{"artifacts":{"doi:10.1016/j.calphad.2011.09.002/p6/tab-4":{"artifact":"table","caption":"Calculated invariant equilibria in the C–RE (RE = La, Ce, Pr) systems compared with the literature data.","label":"4","page":6},"sha256:fc7d91e994add5bd/p2/tab-1":{"artifact":"table","caption":"Crystal structure data for the solid phases in the C–RE (RE = La, Ce, Pr) systems.","label":"1","page":2},"sha256:fc7d91e994add5bd/p2/tab-2":{"artifact":"table","caption":"Experimentally measured values of enthalpies of formation at 298 K for the intermetallic compounds in the C–RE (RE = La, Ce, Pr) systems.","label":"2","page":2}},"cite_as":{"also_cite":["the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work)"],"bibtex":"@misc{orchid_literature_2026,\n  author    = {Arr{\\'o}yave, Raymundo and Saal, James and Shin, Dongwon},\n  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},\n  version   = {2026.10},\n  publisher = {Zenodo},\n  year      = {2026},\n  doi       = {10.5281/zenodo.23735569},\n  url       = {https://doi.org/10.5281/zenodo.23735569},\n  note      = {Version 1, machine-extracted}\n}","dataset":"literature","doi":"10.5281/zenodo.23735569","license":"CC-BY-4.0","part_of":{"bibtex":"@misc{orchid_data_2026,\n  author    = {Arr{\\'o}yave, Raymundo and Saal, James and Shin, Dongwon},\n  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},\n  version   = {2026.10},\n  publisher = {Zenodo},\n  year      = {2026},\n  doi       = {10.5281/zenodo.23736065},\n  url       = {https://doi.org/10.5281/zenodo.23736065},\n  note      = {Version 1, machine-extracted}\n}","doi":"10.5281/zenodo.23736065","text":"R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23736065","title":"ORCHID data: umbrella record of the ORCHID datasets","url":"https://doi.org/10.5281/zenodo.23736065"},"release_tag":"v2026.10","status":"Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.","text":"R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735569","title":"ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature","url":"https://doi.org/10.5281/zenodo.23735569","version":"2026.10"},"contexts":{},"elements":["C","CE"],"licence":"CC BY 4.0 (ORCHID data; quotes are short excerpts kept for verification, the publishers' copyright, not relicensed)","models":{},"note":"records[].locator.ref -> artifacts; records[].model -> models (full records: orchid-literature.jsonl.gz)","papers":{"doi:10.1016/0022-1902(68)80476-2":{"authors":["R.L. Faircloth","R.H. Flowers","F.C.W. Pummery"],"citation":"R.L. Faircloth, R.H. Flowers, F.C.W. Pummery, Vaporization of some rare-earth dicarbides, Journal of Inorganic and Nuclear Chemistry 30, 499-518 (1968).","container":"Journal of Inorganic and Nuclear Chemistry","doi":"10.1016/0022-1902(68)80476-2","doi_url":"https://doi.org/10.1016/0022-1902(68)80476-2","id":"doi:10.1016/0022-1902(68)80476-2","kind":"cited_work","metadata_source":"crossref","roles":["cited_source"],"source_kinds":["cited_work"],"title":"Vaporization of some rare-earth dicarbides","year":1968},"doi:10.1016/0022-4596(86)90228-8":{"authors":["D.W. Jones","I.J. McColm","R. Steadman","J. Yerkess"],"citation":"D.W. Jones, I.J. McColm, R. Steadman, J. Yerkess, Neutron powder diffraction study of tetragonal crystal structures of cerium-neodymium dicarbides, Journal of Solid State Chemistry 62, 172-176 (1986).","container":"Journal of Solid State Chemistry","doi":"10.1016/0022-4596(86)90228-8","doi_url":"https://doi.org/10.1016/0022-4596(86)90228-8","id":"doi:10.1016/0022-4596(86)90228-8","kind":"cited_work","metadata_source":"crossref","roles":["cited_source"],"source_kinds":["cited_work"],"title":"Neutron powder diffraction study of tetragonal crystal structures of cerium-neodymium dicarbides","year":1986},"doi:10.1016/0022-5088(88)90046-x":{"authors":["A Pialoux"],"citation":"A Pialoux, Etude thermodynamique et structurale du systeme CeCO en presence de carbone libre, Journal of the Less Common Metals 143, 219-242 (1988).","container":"Journal of the Less Common Metals","doi":"10.1016/0022-5088(88)90046-x","doi_url":"https://doi.org/10.1016/0022-5088(88)90046-x","id":"doi:10.1016/0022-5088(88)90046-x","kind":"cited_work","metadata_source":"crossref","roles":["cited_source"],"source_kinds":["cited_work"],"title":"Etude thermodynamique et structurale du systeme CeCO en presence de carbone libre","year":1988},"doi:10.1016/0925-8388(94)06009-6":{"authors":["S.V. Meschel","O.J. Kleppa"],"citation":"S.V. Meschel, O.J. Kleppa, Standard enthalpies of formation of some carbides, silicides and germanides of cerium and praseodymium, Journal of Alloys and Compounds 220, 88-93 (1995).","container":"Journal of Alloys and Compounds","doi":"10.1016/0925-8388(94)06009-6","doi_url":"https://doi.org/10.1016/0925-8388(94)06009-6","id":"doi:10.1016/0925-8388(94)06009-6","kind":"cited_work","metadata_source":"crossref","roles":["cited_source"],"source_kinds":["cited_work"],"title":"Standard enthalpies of formation of some carbides, silicides and germanides of cerium and praseodymium","year":1995},"doi:10.1016/j.calphad.2011.09.002":{"authors":["Yingbiao Peng","Yong Du","Lijun Zhang","Chunsheng Sha","Shuhong Liu","Feng Zheng","Dongdong Zhao","Xiaoming Yuan","Li Chen"],"citation":"Yingbiao Peng, Yong Du, Lijun Zhang, Chunsheng Sha, Shuhong Liu, Feng Zheng et al., Thermodynamic modeling of the C–RE (RE=La, Ce and Pr) systems, Calphad 35, 533-541 (2011).","container":"Calphad","doi":"10.1016/j.calphad.2011.09.002","doi_url":"https://doi.org/10.1016/j.calphad.2011.09.002","id":"doi:10.1016/j.calphad.2011.09.002","kind":"corpus_paper","metadata_source":"crossref","pdf_sha256_prefix":"fc7d91e994add5bd","roles":["reporting_paper"],"source_kinds":["journal_article"],"title":"Thermodynamic modeling of the C–RE (RE=La, Ce and Pr) systems","year":2011},"doi:10.1016/s0021-9614(71)80068-x":{"authors":["Floyd B. Baker","Elmer J. Huber","Charles E. Holley","N.H. Krikorian"],"citation":"Floyd B. Baker, Elmer J. Huber, Charles E. Holley, N.H. Krikorian, Enthalpies of formation of cerium dioxide, cerium sesquicarbide, and cerium dicarbide, The Journal of Chemical Thermodynamics 3, 77-83 (1971).","container":"The Journal of Chemical Thermodynamics","doi":"10.1016/s0021-9614(71)80068-x","doi_url":"https://doi.org/10.1016/s0021-9614(71)80068-x","id":"doi:10.1016/s0021-9614(71)80068-x","kind":"cited_work","metadata_source":"crossref","roles":["cited_source"],"source_kinds":["cited_work"],"title":"Enthalpies of formation of cerium dioxide, cerium sesquicarbide, and cerium dicarbide","year":1971},"doi:10.1016/s0022-3115(03)00071-0":{"authors":["R Vidhya","M.P Antony","P.R Vasudeva Rao","B Viswanathan"],"citation":"R Vidhya, M.P Antony, P.R Vasudeva Rao, B Viswanathan, Enthalpy and Gibbs energy of formation of cerium dicarbide, Journal of Nuclear Materials 317, 102-108 (2003).","container":"Journal of Nuclear Materials","doi":"10.1016/s0022-3115(03)00071-0","doi_url":"https://doi.org/10.1016/s0022-3115(03)00071-0","id":"doi:10.1016/s0022-3115(03)00071-0","kind":"cited_work","metadata_source":"crossref","roles":["cited_source"],"source_kinds":["cited_work"],"title":"Enthalpy and Gibbs energy of formation of cerium dicarbide","year":2003},"doi:10.1021/j100872a050":{"authors":["Perrin Winchell","N. L. Baldwin"],"citation":"Perrin Winchell, N. L. Baldwin, Mass spectrometric-Knudsen cell study of cerium dicrbide sublimation and thermal and x-ray analyses of cerium dicarbide, J. Phys. Chem. 71, 4476-4479 (1967).","container":"J. Phys. Chem.","doi":"10.1021/j100872a050","doi_url":"https://doi.org/10.1021/j100872a050","id":"doi:10.1021/j100872a050","kind":"cited_work","metadata_source":"crossref","roles":["cited_source"],"source_kinds":["cited_work"],"title":"Mass spectrometric-Knudsen cell study of cerium dicrbide sublimation and thermal and x-ray analyses of cerium dicarbide","year":1967}},"part":1,"parts":1,"records":[{"chemical_system":"C-CE","cited_sources":[{"first_author":"Atoji","kind":"unknown","label":"13","reference":"M. Atoji, D.E. Williams, J. Chem. Phys. 35 (1961) 1960–1966.","status":"resolved","year":1961,"year_basis":"printed_parenthesised_year","year_read":"1966"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.4,"LA":0.0,"PR":0.0},"phases":["Ce2C3"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-MWHABIRH56","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-1","row":9},"observation_type":"structural_property","origin":{"basis":"cited_work_before_1980_assumed_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.4},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.4,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"Ce2C3"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-1/r09#structural_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"LATTICE_A","property_group":"crystal structure","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.1-pro-preview","gemini-3.8-flash","text_layer"],"record_kind":"general_table","source_system":"C-CE-LA-PR","structure":{"pearson_symbol":"cI40","prototype":"Pu2C3","space_group":"I4-3D"},"system":"C-CE","temperature_K":298.15,"temperature_basis":"assumed_room_temperature","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"reading_resolution","value":0.005},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":0.01857,"sigma_method":{"basis":"calibrated","ci95":[0.001793,0.002549],"class":"unknown","entry":"value_types/LATTICE_LENGTH/classes/unknown","floor":0.0022,"floor_unit":"relative (fraction of the value)","n_pairs":586,"value":0.01857},"sigma_printed":null,"sigma_reading":{"basis":"last_printed_digit","value":0.005},"sigma_scatter":null,"unit":"Å","value_type":"LATTICE_LENGTH"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"Å","unit_stored":"Å","value":8.44,"value_stored":8.44},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1016/0022-4596(86)90228-8","first_author":"Jones","kind":"unknown","label":"14","paper":"doi:10.1016/0022-4596(86)90228-8","reference":"D.W. Jones, I.J. McColm, R. Steadman, J. Yerkess, J. Solid State Chem. 62 (1986) 172–176.","status":"resolved","year":"1986"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["α CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-MHPKDH47I6.1e3f3c","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-1","row":10},"observation_type":"structural_property","origin":{"basis":"cited_work_title_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"α CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-1/r10#structural_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"LATTICE_A","property_group":"crystal structure","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.1-pro-preview","gemini-3.8-flash","text_layer"],"record_kind":"general_table","source_system":"C-CE-LA-PR","structure":{"pearson_symbol":"tI6","prototype":"CaC2","space_group":"I4/mmm"},"system":"C-CE","temperature_K":298.15,"temperature_basis":"assumed_room_temperature","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"reading_resolution","value":0.005},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":0.008536,"sigma_method":{"basis":"calibrated","ci95":[0.001793,0.002549],"class":"unknown","entry":"value_types/LATTICE_LENGTH/classes/unknown","floor":0.0022,"floor_unit":"relative (fraction of the value)","n_pairs":586,"value":0.008536},"sigma_printed":null,"sigma_reading":{"basis":"last_printed_digit","value":0.005},"sigma_scatter":null,"unit":"Å","value_type":"LATTICE_LENGTH"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"Å","unit_stored":"Å","value":3.88,"value_stored":3.88},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1016/0022-4596(86)90228-8","first_author":"Jones","kind":"unknown","label":"14","paper":"doi:10.1016/0022-4596(86)90228-8","reference":"D.W. Jones, I.J. McColm, R. Steadman, J. Yerkess, J. Solid State Chem. 62 (1986) 172–176.","status":"resolved","year":"1986"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["α CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-MHPKDH47I6.33eed6","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-1","row":10},"observation_type":"structural_property","origin":{"basis":"cited_work_title_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"α CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-1/r10#structural_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"LATTICE_C","property_group":"crystal structure","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.1-pro-preview","gemini-3.8-flash","text_layer"],"record_kind":"general_table","source_system":"C-CE-LA-PR","structure":{"pearson_symbol":"tI6","prototype":"CaC2","space_group":"I4/mmm"},"system":"C-CE","temperature_K":298.15,"temperature_basis":"assumed_room_temperature","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"reading_resolution","value":0.005},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":0.01426,"sigma_method":{"basis":"calibrated","ci95":[0.001793,0.002549],"class":"unknown","entry":"value_types/LATTICE_LENGTH/classes/unknown","floor":0.0022,"floor_unit":"relative (fraction of the value)","n_pairs":586,"value":0.01426},"sigma_printed":null,"sigma_reading":{"basis":"last_printed_digit","value":0.005},"sigma_scatter":null,"unit":"Å","value_type":"LATTICE_LENGTH"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"Å","unit_stored":"Å","value":6.48,"value_stored":6.48},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1021/j100872a050","first_author":"Winchell","kind":"unknown","label":"15","paper":"doi:10.1021/j100872a050","reference":"P. Winchell, N.L. Baldwin, J. Phys. Chem. 71 (1967) 4476–4479.","status":"resolved","year":"1967"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["β CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","specification_gaps":["state:T_K_explicit","temperature not stated"],"state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-UUJQ7CFIHH.6ee29d","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-1","row":11},"observation_type":"structural_property","origin":{"basis":"cited_work_before_1980_assumed_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"β CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-1/r11#structural_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"LATTICE_A","property_group":"crystal structure","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.1-pro-preview","gemini-3.8-flash","text_layer"],"record_kind":"general_table","source_system":"C-CE-LA-PR","structure":{"pearson_symbol":"cF12","prototype":"CaF2","space_group":"Fm-3m"},"system":"C-CE","temperature_basis":"not_printed","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"reading_resolution","value":0.005},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":0.01305,"sigma_method":{"basis":"calibrated","ci95":[0.001793,0.002549],"class":"unknown","entry":"value_types/LATTICE_LENGTH/classes/unknown","floor":0.0022,"floor_unit":"relative (fraction of the value)","n_pairs":586,"value":0.01305},"sigma_printed":null,"sigma_reading":{"basis":"last_printed_digit","value":0.005},"sigma_scatter":null,"unit":"Å","value_type":"LATTICE_LENGTH"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"Å","unit_stored":"Å","value":5.93,"value_stored":5.93},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1021/j100872a050","first_author":"Winchell","kind":"unknown","label":"15","paper":"doi:10.1021/j100872a050","reference":"P. Winchell, N.L. Baldwin, J. Phys. Chem. 71 (1967) 4476–4479.","status":"resolved","year":"1967"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["β CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","specification_gaps":["state:T_K_explicit","temperature not stated"],"state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-UUJQ7CFIHH.792bda","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-1","row":11},"observation_type":"structural_property","origin":{"basis":"cited_work_before_1980_assumed_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"β CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-1/r11#structural_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"LATTICE_C","property_group":"crystal structure","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.1-pro-preview","gemini-3.8-flash","text_layer"],"record_kind":"general_table","source_system":"C-CE-LA-PR","structure":{"pearson_symbol":"cF12","prototype":"CaF2","space_group":"Fm-3m"},"system":"C-CE","temperature_basis":"not_printed","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"reading_resolution","value":0.05},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":0.05,"sigma_method":{"basis":"calibrated","ci95":[0.001793,0.002549],"class":"unknown","entry":"value_types/LATTICE_LENGTH/classes/unknown","floor":0.0022,"floor_unit":"relative (fraction of the value)","n_pairs":586,"value":0.01144},"sigma_printed":null,"sigma_reading":{"basis":"last_printed_digit","value":0.05},"sigma_scatter":null,"unit":"Å","value_type":"LATTICE_LENGTH"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"Å","unit_stored":"Å","value":5.2,"value_stored":5.2},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1016/s0021-9614(71)80068-x","first_author":"Baker","kind":"unknown","label":"41","paper":"doi:10.1016/s0021-9614(71)80068-x","reference":"F.B. Baker, E.J. Huber Jr., C.E. Holley Jr., N.H. Krikorian, J. Chem. Thermodyn. 3 (1971) 77–83.","status":"resolved","year":"1971"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":298.15,"before":298.0,"evidence":{"printed":"298"},"field":"temperature_K","gate":"G1","rule":"standard_reference_temperature"},{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.4,"LA":0.0,"PR":0.0},"phases":["Ce2C3"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","specification_gaps":["reference-dependent quantity without a resolved reference state","state:reference_state"],"state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-JGMS3QYHGU.04cfd2","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-2","row":8},"merged_ids":["ORC-JGMS3QYHGU.c4c2f2"],"method":"Bomb calorimetry","method_basis":"printed in the table row/column","observation_type":"equilibrium_property","origin":{"basis":"printed_source_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.4},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.4,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"Ce2C3"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-2/r08#equilibrium_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"HM_FORM","property_group":"formation","property_printed":"ΔfH (298 K)","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"general_table","reference_state":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"}},"reference_state_stored":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"},"LA":{"phase":"printed:none"},"PR":{"phase":"printed:none"}},"source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":298.15,"temperature_K_stored":298.0,"temperature_basis":"printed","temperature_printed":"298","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"printed","value":1.1},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":1.1,"sigma_method":{"basis":"cleaned_below_threshold","ci95":[0.088062,5.330144],"class":"combustion_calorimetry","entry":"value_types/HM_FORM/classes/combustion_calorimetry","floor":1.0,"floor_unit":"kJ/mol-atom","n_pairs":15,"prior_source":"kubaschewski","value":1.0},"sigma_printed":{"kind":"plus_minus_coverage_not_stated","taken_as":"1 sigma","value":1.1},"sigma_reading":{"basis":"last_printed_digit","value":0.05},"sigma_scatter":null,"unit":"kJ/mol-atom","value_type":"HM_FORM"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"kJ/mol-atom","unit_basis":"column_header","unit_printed":"kJ/mol-atom","unit_stored":"J/mol-atom","value":-35.3,"value_printed":-35.3,"value_stored":-35300.0},{"chemical_system":"C-CE","cited_sources":[{"first_author":"Balducci","kind":"unknown","label":"42","reference":"G. Balducci, A. Capalbi, G. De Maria, M. Guido, J. Chem. Phys. 50 (1969) 1969–1974.","status":"resolved","year":1969,"year_basis":"printed_parenthesised_year","year_read":"1974"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":298.15,"before":298.0,"evidence":{"printed":"298"},"field":"temperature_K","gate":"G1","rule":"standard_reference_temperature"},{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","specification_gaps":["reference-dependent quantity without a resolved reference state","state:reference_state"],"state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-LYASWSGJGJ.1deb6c","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-2","row":9},"merged_ids":["ORC-LYASWSGJGJ.9a5be0"],"method":"Knudsen cell MS","method_basis":"printed in the table row/column","observation_type":"equilibrium_property","origin":{"basis":"printed_source_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-2/r09#equilibrium_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"HM_FORM","property_group":"formation","property_printed":"ΔfH (298 K)","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"general_table","reference_state":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"}},"reference_state_stored":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"},"LA":{"phase":"printed:none"},"PR":{"phase":"printed:none"}},"source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":298.15,"temperature_K_stored":298.0,"temperature_basis":"printed","temperature_printed":"298","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"printed","value":7.0},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":7.0,"sigma_method":{"basis":"calibrated","ci95":[1.153192,7.653003],"class":"kems_vapour","entry":"value_types/HM_FORM/classes/kems_vapour","floor":4.2,"floor_unit":"kJ/mol-atom","n_pairs":20,"value":4.2},"sigma_printed":{"kind":"plus_minus_coverage_not_stated","taken_as":"1 sigma","value":7.0},"sigma_reading":{"basis":"last_printed_digit","value":0.05},"sigma_scatter":null,"unit":"kJ/mol-atom","value_type":"HM_FORM"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"kJ/mol-atom","unit_basis":"column_header","unit_printed":"kJ/mol-atom","unit_stored":"J/mol-atom","value":-20.9,"value_printed":-20.9,"value_stored":-20900.0},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1021/j100872a050","first_author":"Winchell","kind":"unknown","label":"15","paper":"doi:10.1021/j100872a050","reference":"P. Winchell, N.L. Baldwin, J. Phys. Chem. 71 (1967) 4476–4479.","status":"resolved","year":"1967"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":298.15,"before":298.0,"evidence":{"printed":"298"},"field":"temperature_K","gate":"G1","rule":"standard_reference_temperature"},{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","specification_gaps":["reference-dependent quantity without a resolved reference state","state:reference_state"],"state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-7ZU55J4DMS","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-2","row":10},"method":"Knudsen cell MS","method_basis":"printed in the table row/column","observation_type":"equilibrium_property","origin":{"basis":"printed_source_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-2/r10#equilibrium_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"HM_FORM","property_group":"formation","property_printed":"ΔfH (298 K)","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"general_table","reference_state":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"}},"reference_state_stored":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"},"LA":{"phase":"printed:none"},"PR":{"phase":"printed:none"}},"source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":298.15,"temperature_K_stored":298.0,"temperature_basis":"printed","temperature_printed":"298","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"stated_default","note":"5% default","value":1.36},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":4.2,"sigma_method":{"basis":"calibrated","ci95":[1.153192,7.653003],"class":"kems_vapour","entry":"value_types/HM_FORM/classes/kems_vapour","floor":4.2,"floor_unit":"kJ/mol-atom","n_pairs":20,"value":4.2},"sigma_printed":null,"sigma_reading":{"basis":"last_printed_digit","value":0.05},"sigma_scatter":null,"unit":"kJ/mol-atom","value_type":"HM_FORM"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"kJ/mol-atom","unit_basis":"column_header","unit_printed":"kJ/mol-atom","unit_stored":"J/mol-atom","value":-27.2,"value_printed":-27.2,"value_stored":-27200.0},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1016/0925-8388(94)06009-6","first_author":"Meschel","kind":"unknown","label":"43","paper":"doi:10.1016/0925-8388(94)06009-6","reference":"S.V. Meschel, O.J. Kleppa, J. Alloys Compd. 220 (1995) 88–93.","status":"resolved","year":"1995"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":298.15,"before":298.0,"evidence":{"printed":"298"},"field":"temperature_K","gate":"G1","rule":"standard_reference_temperature"},{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","specification_gaps":["reference-dependent quantity without a resolved reference state","state:reference_state"],"state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-IJVD6G4UC3.004536","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-2","row":11},"merged_ids":["ORC-IJVD6G4UC3.bd4684"],"method":"Synthesis calorimetry","method_basis":"printed in the table row/column","observation_type":"equilibrium_property","origin":{"basis":"printed_source_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-2/r11#equilibrium_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"HM_FORM","property_group":"formation","property_printed":"ΔfH (298 K)","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"general_table","reference_state":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"}},"reference_state_stored":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"},"LA":{"phase":"printed:none"},"PR":{"phase":"printed:none"}},"source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":298.15,"temperature_K_stored":298.0,"temperature_basis":"printed","temperature_printed":"298","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"printed","value":1.4},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":3.2,"sigma_method":{"basis":"calibrated","ci95":[2.201549,4.602285],"class":"solution_reaction_calorimetry","entry":"value_types/HM_FORM/classes/solution_reaction_calorimetry","floor":3.2,"floor_unit":"kJ/mol-atom","n_pairs":80,"value":3.2},"sigma_printed":{"kind":"plus_minus_coverage_not_stated","taken_as":"1 sigma","value":1.4},"sigma_reading":{"basis":"last_printed_digit","value":0.05},"sigma_scatter":null,"unit":"kJ/mol-atom","value_type":"HM_FORM"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"kJ/mol-atom","unit_basis":"column_header","unit_printed":"kJ/mol-atom","unit_stored":"J/mol-atom","value":-25.4,"value_printed":-25.4,"value_stored":-25400.0},{"chemical_system":"C-CE","cited_sources":[{"first_author":"Anderson","kind":"assessment","label":"35","reference":"J.S. Anderson, A.N. Bagshaw, Rev. Chim. Miner. 9 (1972) 115–138. Y. Peng et al. / CALPHAD: Computer Coupling of Phase Diagrams and Thermochemistry 35 (2011) 533–541","status":"resolved","year":"2011"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":298.15,"before":298.0,"evidence":{"printed":"298"},"field":"temperature_K","gate":"G1","rule":"standard_reference_temperature"},{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","specification_gaps":["reference-dependent quantity without a resolved reference state","state:reference_state"],"state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-33HYQ2NTQM.39f3d1","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-2","row":12},"merged_ids":["ORC-33HYQ2NTQM.e73460"],"method":"emf","method_basis":"printed in the table row/column","observation_type":"equilibrium_property","origin":{"basis":"printed_source_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-2/r12#equilibrium_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"HM_FORM","property_group":"formation","property_printed":"ΔfH (298 K)","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"general_table","reference_state":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"}},"reference_state_stored":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"},"LA":{"phase":"printed:none"},"PR":{"phase":"printed:none"}},"source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":298.15,"temperature_K_stored":298.0,"temperature_basis":"printed","temperature_printed":"298","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"printed","value":3.5},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":4.6,"sigma_method":{"basis":"cleaned_below_threshold","ci95":[1.887042,14.818519],"class":"emf","entry":"value_types/HM_FORM/classes/emf","floor":4.6,"floor_unit":"kJ/mol-atom","n_pairs":17,"prior_source":"kubaschewski","value":4.6},"sigma_printed":{"kind":"plus_minus_coverage_not_stated","taken_as":"1 sigma","value":3.5},"sigma_reading":{"basis":"last_printed_digit","value":0.05},"sigma_scatter":null,"unit":"kJ/mol-atom","value_type":"HM_FORM"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"kJ/mol-atom","unit_basis":"column_header","unit_printed":"kJ/mol-atom","unit_stored":"J/mol-atom","value":-29.5,"value_printed":-29.5,"value_stored":-29500.0},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1016/0022-5088(88)90046-x","first_author":"Pialoux","kind":"unknown","label":"44","paper":"doi:10.1016/0022-5088(88)90046-x","reference":"A. Pialoux, J. Less-Common Met. 143 (1988) 219–242.","status":"resolved","year":"1988"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":298.15,"before":298.0,"evidence":{"printed":"298"},"field":"temperature_K","gate":"G1","rule":"standard_reference_temperature"},{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","specification_gaps":["reference-dependent quantity without a resolved reference state","state:reference_state"],"state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-VQHVGJKEGN","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-2","row":13},"method":"Controlled CO pressure","method_basis":"printed in the table row/column","observation_type":"equilibrium_property","origin":{"basis":"printed_source_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-2/r13#equilibrium_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"HM_FORM","property_group":"formation","property_printed":"ΔfH (298 K)","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"general_table","reference_state":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"}},"reference_state_stored":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"},"LA":{"phase":"printed:none"},"PR":{"phase":"printed:none"}},"source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":298.15,"temperature_K_stored":298.0,"temperature_basis":"printed","temperature_printed":"298","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"stated_default","note":"5% default","value":1.565},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":4.1,"sigma_method":{"basis":"cleaned_below_threshold","ci95":[1.991877,9.330373],"class":"experimental_unspecified","entry":"value_types/HM_FORM/classes/experimental_unspecified","floor":4.1,"floor_unit":"kJ/mol-atom","n_pairs":29,"prior_source":"kubaschewski","value":4.1},"sigma_printed":null,"sigma_reading":{"basis":"last_printed_digit","value":0.05},"sigma_scatter":null,"unit":"kJ/mol-atom","value_type":"HM_FORM"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"kJ/mol-atom","unit_basis":"column_header","unit_printed":"kJ/mol-atom","unit_stored":"J/mol-atom","value":-31.3,"value_printed":-31.3,"value_stored":-31300.0},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1016/s0021-9614(71)80068-x","first_author":"Baker","kind":"unknown","label":"41","paper":"doi:10.1016/s0021-9614(71)80068-x","reference":"F.B. Baker, E.J. Huber Jr., C.E. Holley Jr., N.H. Krikorian, J. Chem. Thermodyn. 3 (1971) 77–83.","status":"resolved","year":"1971"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":298.15,"before":298.0,"evidence":{"printed":"298"},"field":"temperature_K","gate":"G1","rule":"standard_reference_temperature"},{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","specification_gaps":["reference-dependent quantity without a resolved reference state","state:reference_state"],"state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-G6NSZLCZ6G.8b7d6b","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-2","row":14},"merged_ids":["ORC-G6NSZLCZ6G.9eba4e"],"method":"Bomb calorimetry","method_basis":"printed in the table row/column","observation_type":"equilibrium_property","origin":{"basis":"printed_source_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-2/r14#equilibrium_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"HM_FORM","property_group":"formation","property_printed":"ΔfH (298 K)","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"general_table","reference_state":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"}},"reference_state_stored":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"},"LA":{"phase":"printed:none"},"PR":{"phase":"printed:none"}},"source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":298.15,"temperature_K_stored":298.0,"temperature_basis":"printed","temperature_printed":"298","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"printed","value":1.8},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":1.8,"sigma_method":{"basis":"cleaned_below_threshold","ci95":[0.088062,5.330144],"class":"combustion_calorimetry","entry":"value_types/HM_FORM/classes/combustion_calorimetry","floor":1.0,"floor_unit":"kJ/mol-atom","n_pairs":15,"prior_source":"kubaschewski","value":1.0},"sigma_printed":{"kind":"plus_minus_coverage_not_stated","taken_as":"1 sigma","value":1.8},"sigma_reading":{"basis":"last_printed_digit","value":0.05},"sigma_scatter":null,"unit":"kJ/mol-atom","value_type":"HM_FORM"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"kJ/mol-atom","unit_basis":"column_header","unit_printed":"kJ/mol-atom","unit_stored":"J/mol-atom","value":-32.4,"value_printed":-32.4,"value_stored":-32400.0},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1016/0022-1902(68)80476-2","first_author":"Faircloth","kind":"unknown","label":"33","paper":"doi:10.1016/0022-1902(68)80476-2","reference":"R.L. Faircloth, R.H. Flowers, F.C.W. Pummery, J. Inorg. Nucl. Chem. 30 (1968) 499–518.","status":"resolved","year":"1968"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":298.15,"before":298.0,"evidence":{"printed":"298"},"field":"temperature_K","gate":"G1","rule":"standard_reference_temperature"},{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","specification_gaps":["reference-dependent quantity without a resolved reference state","state:reference_state"],"state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-JQOKSVUD7L","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-2","row":15},"method":"Knudsen effusion","method_basis":"printed in the table row/column","observation_type":"equilibrium_property","origin":{"basis":"printed_source_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-2/r15#equilibrium_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"HM_FORM","property_group":"formation","property_printed":"ΔfH (298 K)","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"general_table","reference_state":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"}},"reference_state_stored":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"},"LA":{"phase":"printed:none"},"PR":{"phase":"printed:none"}},"source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":298.15,"temperature_K_stored":298.0,"temperature_basis":"printed","temperature_printed":"298","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"stated_default","note":"5% default","value":1.745},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":4.2,"sigma_method":{"basis":"calibrated","ci95":[1.153192,7.653003],"class":"kems_vapour","entry":"value_types/HM_FORM/classes/kems_vapour","floor":4.2,"floor_unit":"kJ/mol-atom","n_pairs":20,"value":4.2},"sigma_printed":null,"sigma_reading":{"basis":"last_printed_digit","value":0.05},"sigma_scatter":null,"unit":"kJ/mol-atom","value_type":"HM_FORM"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"kJ/mol-atom","unit_basis":"column_header","unit_printed":"kJ/mol-atom","unit_stored":"J/mol-atom","value":-34.9,"value_printed":-34.9,"value_stored":-34900.0},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1016/s0022-3115(03)00071-0","first_author":"Vidhya","kind":"unknown","label":"45","paper":"doi:10.1016/s0022-3115(03)00071-0","reference":"R. Vidhya, M.P. Antony, P.R. Vasudeva Rao, B. Viswanathan, J. Nucl. Mater. 317 (2003) 102–108.","status":"resolved","year":"2003"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":298.15,"before":298.0,"evidence":{"printed":"298"},"field":"temperature_K","gate":"G1","rule":"standard_reference_temperature"},{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"phase_formula","overall_composition":{"CE":0.333333,"LA":0.0,"PR":0.0},"phases":["CeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","specification_gaps":["reference-dependent quantity without a resolved reference state","state:reference_state"],"state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-UPE37JFFSG.27e28e","locator":{"ref":"sha256:fc7d91e994add5bd/p2/tab-2","row":16},"merged_ids":["ORC-UPE37JFFSG.eed68c"],"method":"Dynamic effusion MS","method_basis":"printed in the table row/column","observation_type":"equilibrium_property","origin":{"basis":"printed_source_experimental","class":"experimental","own_work_of_paper":false},"overall_composition":{"CE":0.333333},"overall_composition_basis":"from_formula","overall_composition_stored":{"CE":0.333333,"LA":0.0,"PR":0.0},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"CeC2"}],"pid":"sha256:fc7d91e994add5bd/p2/tab-2/r16#equilibrium_property","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"unstated_assumed","property":"HM_FORM","property_group":"formation","property_printed":"ΔfH (298 K)","reader_agreement":"multi_reader","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"general_table","reference_state":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"}},"reference_state_stored":{"C":{"phase":"printed:none"},"CE":{"phase":"printed:none"},"LA":{"phase":"printed:none"},"PR":{"phase":"printed:none"}},"source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":298.15,"temperature_K_stored":298.0,"temperature_basis":"printed","temperature_printed":"298","tool_release":"tools-release-v2.1.18","uncertainty":{"basis":"printed","value":3.7},"uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":4.2,"sigma_method":{"basis":"calibrated","ci95":[1.153192,7.653003],"class":"kems_vapour","entry":"value_types/HM_FORM/classes/kems_vapour","floor":4.2,"floor_unit":"kJ/mol-atom","n_pairs":20,"value":4.2},"sigma_printed":{"kind":"plus_minus_coverage_not_stated","taken_as":"1 sigma","value":3.7},"sigma_reading":{"basis":"last_printed_digit","value":0.005},"sigma_scatter":null,"unit":"kJ/mol-atom","value_type":"HM_FORM"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"kJ/mol-atom","unit_basis":"column_header","unit_printed":"kJ/mol-atom","unit_stored":"J/mol-atom","value":-40.03,"value_printed":-40.03,"value_stored":-40030.0},{"chemical_system":"C-CE","conditions":{"kind":"not_applicable_own_calculation"},"corrections":[{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"every_phase_determined","overall_composition":null,"phases":["βCeC2","(C)","αCeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"model","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","row_state":"settled","state_fully_specified":true,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-ITKYX3YG5T","locator":{"ref":"doi:10.1016/j.calphad.2011.09.002/p6/tab-4","row":19},"model_unlinked_reason":"reporting paper's own calculation, but no TDB linked to the table","observation_type":"invariant_reaction","origin":{"basis":"this_work+paper_text_states_calculated","class":"model_value","measured_in":"doi:10.1016/j.calphad.2011.09.002","own_work_of_paper":true},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phase_compositions":[{"basis":"mole_fraction (converted from atomic percent)","composition":{"C":0.667},"composition_source":"printed","phase":"βCeC2"},{"basis":"mole_fraction (converted from atomic percent)","composition":{"C":1.0},"composition_source":"printed","phase":"(C)"},{"basis":"mole_fraction (converted from atomic percent)","composition":{"C":0.667},"composition_source":"printed","phase":"αCeC2"}],"phases":[{"label":"βCeC2"},{"label":"(C)"},{"label":"αCeC2"}],"pid":"doi:10.1016/j.calphad.2011.09.002/p6/tab-4/r19#invariant_reaction","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"stated_default_1_atm","property":"INVARIANT_TEMPERATURE","property_group":"invariant reaction","reaction":{"printed":"βCeC2 + (C) <-> αCeC2"},"reader_agreement":"multi_reader","reader_agreement_basis":"derived_from_readers","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"invariant_table","source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":1372.95,"temperature_printed":"1099.8","temperature_uncertainty":{"basis":"stated_default","value":2.0},"tool_release":"v2.1.19n","uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"composition":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":0.005,"sigma_method":{"basis":"calibrated","ci95":[0.004448,0.004448],"class":"model_calculated","entry":"model/X_PHASE","floor":0.005,"floor_unit":"mole fraction","n_pairs":16730,"value":0.005},"sigma_printed":null,"sigma_reading":{"basis":"last_stored_digit","value":0.0005},"sigma_scatter":null,"unit":"mole fraction","value_type":"X_PHASE"},"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":4.0,"sigma_method":{"basis":"calibrated","ci95":[3.11346,4.29954],"class":"model_calculated","entry":"model/T_INVARIANT","floor":4.0,"floor_unit":"K","n_pairs":14146,"value":4.0},"sigma_printed":null,"sigma_reading":{"basis":"last_printed_digit","value":0.005},"sigma_scatter":null,"unit":"K","value_type":"T_INVARIANT"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"K","value":1372.95},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1021/j100872a050","first_author":"Winchell","kind":"unknown","label":"15","paper":"doi:10.1021/j100872a050","reference":"P. Winchell, N.L. Baldwin, J. Phys. Chem. 71 (1967) 4476–4479.","status":"resolved","year":"1967"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"every_phase_determined","overall_composition":null,"phases":["βCeC2","(C)","αCeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","row_state":"settled","state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-5C3XLYMH7A","locator":{"ref":"doi:10.1016/j.calphad.2011.09.002/p6/tab-4","row":20},"observation_type":"invariant_reaction","origin":{"basis":"printed_source_experimental","class":"experimental","own_work_of_paper":false},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"βCeC2"},{"label":"(C)"},{"label":"αCeC2"}],"pid":"doi:10.1016/j.calphad.2011.09.002/p6/tab-4/r20#invariant_reaction","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"stated_default_1_atm","property":"INVARIANT_TEMPERATURE","property_group":"invariant reaction","reaction":{"printed":"βCeC2 + (C) <-> αCeC2"},"reader_agreement":"multi_reader","reader_agreement_basis":"derived_from_readers","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"invariant_table","source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":1373.15,"temperature_uncertainty":{"basis":"printed","value":20.0},"tool_release":"v2.1.19n","uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":20.0,"sigma_method":{"basis":"calibrated","ci95":[9.435209,10.483565],"class":"unknown","entry":"value_types/T_INVARIANT/classes/unknown","floor":11.0,"floor_unit":"K","n_pairs":4912,"value":11.0},"sigma_printed":{"kind":"plus_minus_coverage_not_stated","taken_as":"1 sigma","value":20.0},"sigma_reading":{"basis":"last_printed_digit","value":0.005},"sigma_scatter":null,"unit":"K","value_type":"T_INVARIANT"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"K","value":1373.15},{"chemical_system":"C-CE","conditions":{"kind":"not_applicable_own_calculation"},"corrections":[{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"every_phase_determined","overall_composition":null,"phases":["βCeC2","Ce2C3","αCeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"model","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","row_state":"settled","state_fully_specified":true,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-3MFQV3T3W5","locator":{"ref":"doi:10.1016/j.calphad.2011.09.002/p6/tab-4","row":21},"model_unlinked_reason":"reporting paper's own calculation, but no TDB linked to the table","observation_type":"invariant_reaction","origin":{"basis":"this_work+paper_text_states_calculated","class":"model_value","measured_in":"doi:10.1016/j.calphad.2011.09.002","own_work_of_paper":true},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phase_compositions":[{"basis":"mole_fraction (converted from atomic percent)","composition":{"C":0.667},"composition_source":"printed","phase":"βCeC2"},{"basis":"mole_fraction (converted from atomic percent)","composition":{"C":0.6},"composition_source":"printed","phase":"Ce2C3"},{"basis":"mole_fraction (converted from atomic percent)","composition":{"C":0.667},"composition_source":"printed","phase":"αCeC2"}],"phases":[{"label":"βCeC2"},{"label":"Ce2C3"},{"label":"αCeC2"}],"pid":"doi:10.1016/j.calphad.2011.09.002/p6/tab-4/r21#invariant_reaction","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"stated_default_1_atm","property":"INVARIANT_TEMPERATURE","property_group":"invariant reaction","reaction":{"printed":"βCeC2 <-> Ce2C3 + αCeC2"},"reader_agreement":"multi_reader","reader_agreement_basis":"derived_from_readers","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"invariant_table","source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":1372.95,"temperature_printed":"1099.8","temperature_uncertainty":{"basis":"stated_default","value":2.0},"tool_release":"v2.1.19n","uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"composition":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":0.005,"sigma_method":{"basis":"calibrated","ci95":[0.004448,0.004448],"class":"model_calculated","entry":"model/X_PHASE","floor":0.005,"floor_unit":"mole fraction","n_pairs":16730,"value":0.005},"sigma_printed":null,"sigma_reading":{"basis":"last_stored_digit","value":0.0005},"sigma_scatter":null,"unit":"mole fraction","value_type":"X_PHASE"},"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":4.0,"sigma_method":{"basis":"calibrated","ci95":[3.11346,4.29954],"class":"model_calculated","entry":"model/T_INVARIANT","floor":4.0,"floor_unit":"K","n_pairs":14146,"value":4.0},"sigma_printed":null,"sigma_reading":{"basis":"last_printed_digit","value":0.005},"sigma_scatter":null,"unit":"K","value_type":"T_INVARIANT"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"K","value":1372.95},{"chemical_system":"C-CE","cited_sources":[{"doi":"10.1021/j100872a050","first_author":"Winchell","kind":"unknown","label":"15","paper":"doi:10.1021/j100872a050","reference":"P. Winchell, N.L. Baldwin, J. Phys. Chem. 71 (1967) 4476–4479.","status":"resolved","year":"1967"}],"conditions":{"kind":"cited_source","note":"conditions in the cited source"},"corrections":[{"after":"C-CE","before":"C-CE-LA-PR","evidence":{"basis":"every_phase_determined","overall_composition":null,"phases":["βCeC2","Ce2C3","αCeC2"]},"field":"system","gate":"A1","rule":"system_of_the_state"}],"evidence_class":"experimental","flags":{"calphad_check":"not_available","espei_certified":false,"espei_ready":false,"extraction_accepted":true,"review_state":"extracted","row_state":"settled","state_fully_specified":false,"system_is_state_subsystem":true},"fold_lpo":1,"fold_lso":4,"id":"ORC-HTYBPDQL2W","locator":{"ref":"doi:10.1016/j.calphad.2011.09.002/p6/tab-4","row":22},"observation_type":"invariant_reaction","origin":{"basis":"printed_source_experimental","class":"experimental","own_work_of_paper":false},"paper":"doi:10.1016/j.calphad.2011.09.002","paper_id":"doi:10.1016/j.calphad.2011.09.002","phases":[{"label":"βCeC2"},{"label":"Ce2C3"},{"label":"αCeC2"}],"pid":"doi:10.1016/j.calphad.2011.09.002/p6/tab-4/r22#invariant_reaction","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"stated_default_1_atm","property":"INVARIANT_TEMPERATURE","property_group":"invariant reaction","reaction":{"printed":"βCeC2 <-> Ce2C3 + αCeC2"},"reader_agreement":"multi_reader","reader_agreement_basis":"derived_from_readers","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash+claude","readers":["claude-opus-5.5","gemini-3.8-flash","text_layer"],"record_kind":"invariant_table","source_system":"C-CE-LA-PR","system":"C-CE","temperature_K":1373.15,"temperature_uncertainty":{"basis":"printed","value":20.0},"tool_release":"v2.1.19n","uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"value":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":20.0,"sigma_method":{"basis":"calibrated","ci95":[9.435209,10.483565],"class":"unknown","entry":"value_types/T_INVARIANT/classes/unknown","floor":11.0,"floor_unit":"K","n_pairs":4912,"value":11.0},"sigma_printed":{"kind":"plus_minus_coverage_not_stated","taken_as":"1 sigma","value":20.0},"sigma_reading":{"basis":"last_printed_digit","value":0.005},"sigma_scatter":null,"unit":"K","value_type":"T_INVARIANT"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"},"unit":"K","value":1373.15}],"release":"orchid-literature 2026-10-23 (record store db-v2.1: invariant/general v2.1.19r, text+context fixup-20261022)","system":"C-CE"}