# Cr–Pd phases > Cr–Pd system: 6 phases (tier A 4, liquid 1, needs_review 1); 5 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references. HTML: https://data.orchid-project.org/phases/pages/CR-PD.html · Markdown: https://data.orchid-project.org/phases/pages/CR-PD.md 6 phases (tier A 4, liquid 1, needs_review 1); 5 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model). Data: [interactive registry](https://orchid-project.org/phases/?q=CR-PD) · [full JSON](https://data.orchid-project.org/phases/systems/CR-PD.json) · [Cr–Pd system page](https://data.orchid-project.org/systems/CR-PD.html) · [Markdown](https://data.orchid-project.org/phases/pages/CR-PD.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Cr–Pd system (6) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BCC_A2](#phase-cr-pd-bcc-a2); _phase:cr-pd:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2195.93 K, x(Pd) 0–0.01508 | 4 | 1 | | [CR2PD3_L12](#phase-cr-pd-cr2pd3-l12); _phase:cr-pd:cr2pd3-l12_ | | needs_review | stable in 1 of 1 calculated diagram(s): 300–778.66 K, x(Pd) 0.6–0.6 | 2 | 1 | | [CRPD_L10](#phase-cr-pd-crpd-l10); _phase:cr-pd:crpd-l10_ | AuCu · L1_0 · tP4 · P4/mmm (123) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–842.96 K, x(Pd) 0.5–0.5 | 4 | 1 | | [FCC_A1](#phase-cr-pd-fcc-a1); _phase:cr-pd:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1828 K, x(Pd) 0.49667–1 | 6 | 1 | | [HCP_A3](#phase-cr-pd-hcp-a3); _phase:cr-pd:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 | | [LIQUID](#phase-cr-pd-liquid); _phase:cr-pd:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 1576.87–4000 K, x(Pd) 0–1 | 2 | 1 | ## BCC_A2 (Cr–Pd) - Id: `phase:cr-pd:bcc-a2`; status `assigned` - Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 300–2195.93 K, x(Pd) 0–0.01508 - Literature: 4 values (4 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cr-pd:bcc-a2) Names (3): _corpus: _corpus:phase:cr-pd:bcc-a2 _paper: _paper:10.1361/105497100770340390:(Cr) _tdb: _tdb:CrPd-00Gho-LB.tdb:BCC_A2 ### TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written [CrPd-00Gho-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CrPd-00Gho-LB.tdb): BCC_A2, type code %B, sha256 `a3ff7860baad43f0…` ~~~~text 36: PHASE BCC_A2 %B 2 1 3 ! 37: CONST BCC_A2 : CR% PD : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1361/105497100770340390](https://doi.org/10.1361/105497100770340390) G. Ghosh, G. B. Olson, Thermodynamic modeling of the Cr-Pd and Mo-Pd systems, JPE 21, 32-39 (2000). _assessment that models this phase; reports values for this phase_ ## CR2PD3_L12 (Cr–Pd) - Id: `phase:cr-pd:cr2pd3-l12`; status `needs_review` - No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_L1_2; stoichiometry_contradicts_L1_2:CrPd-00Gho-LB.tdb - Candidate (literature_printed): AuCu3 · cP4 — printed with a label mapped to this phase - Candidate (name_token): AuCu3 · L1_2 · cP4 · Pm-3m (221) — Strukturbericht/word 'L12' in the TDB name - Candidate (sgte_mmc2): AuCu3 · L1_2 · cP4 · Pm-3m (221) — Hallstedt 2025 mmc2 row for CR2PD3_L12: Cr2Pd3 - Candidate (tdb_comment): AuCu3 · cP4 · Pm-3m — CrPd-00Gho-LB.tdb: 'Prototype AuCu3 (cP4, Pm-3m)' - Stoichiometry: Cr 0.4000, Pd 0.6000 - Stability: stable in 1 of 1 calculated diagram(s): 300–778.66 K, x(Pd) 0.6–0.6 - Literature: 2 values (2 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cr-pd:cr2pd3-l12) Names (3): _corpus: _corpus:phase:cr-pd:cr2pd3-l12 _paper: _paper:10.1361/105497100770340390:Cr2Pd3 _tdb: _tdb:CrPd-00Gho-LB.tdb:CR2PD3_L12 ### TDB models of CR2PD3_L12 (1): PHASE and CONSTITUENT statements as written [CrPd-00Gho-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CrPd-00Gho-LB.tdb): CR2PD3_L12, type code %A, sha256 `a3ff7860baad43f0…` ~~~~text 51: PHASE CR2PD3_L12 %A 2 0.4 0.6 ! 52: CONST CR2PD3_L12 : CR : PD : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1361/105497100770340390](https://doi.org/10.1361/105497100770340390) G. Ghosh, G. B. Olson, Thermodynamic modeling of the Cr-Pd and Mo-Pd systems, JPE 21, 32-39 (2000). _assessment that models this phase; reports values for this phase_ ## CRPD_L10 (Cr–Pd) - Id: `phase:cr-pd:crpd-l10`; status `assigned` - Structure: AuCu · L1_0 · tP4 · P4/mmm (123); type `st:l1-0-aucu-tp4`; tier A: standard phase name; confidence high - Stoichiometry: Cr 0.5000, Pd 0.5000 - Stability: stable in 1 of 1 calculated diagram(s): 300–842.96 K, x(Pd) 0.5–0.5 - Literature: 4 values (4 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cr-pd:crpd-l10) Names (3): _corpus: _corpus:phase:cr-pd:crpd-l10 _paper: _paper:10.1361/105497100770340390:CrPd _tdb: _tdb:CrPd-00Gho-LB.tdb:CRPD_L10 ### TDB models of CRPD_L10 (1): PHASE and CONSTITUENT statements as written [CrPd-00Gho-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CrPd-00Gho-LB.tdb): CRPD_L10, type code %A, sha256 `a3ff7860baad43f0…` ~~~~text 46: PHASE CRPD_L10 %A 2 0.5 0.5 ! 47: CONST CRPD_L10 : CR : PD : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1361/105497100770340390](https://doi.org/10.1361/105497100770340390) G. Ghosh, G. B. Olson, Thermodynamic modeling of the Cr-Pd and Mo-Pd systems, JPE 21, 32-39 (2000). _assessment that models this phase; reports values for this phase_ ## FCC_A1 (Cr–Pd) - Id: `phase:cr-pd:fcc-a1`; status `assigned` - Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 300–1828 K, x(Pd) 0.49667–1 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cr-pd:fcc-a1) Names (3): _corpus: _corpus:phase:cr-pd:fcc-a1 _paper: _paper:10.1361/105497100770340390:(Pd) _tdb: _tdb:CrPd-00Gho-LB.tdb:FCC_A1 ### TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written [CrPd-00Gho-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CrPd-00Gho-LB.tdb): FCC_A1, type code %A, sha256 `a3ff7860baad43f0…` ~~~~text 31: PHASE FCC_A1 %A 2 1 1 ! 32: CONST FCC_A1 : CR PD% : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1361/105497100770340390](https://doi.org/10.1361/105497100770340390) G. Ghosh, G. B. Olson, Thermodynamic modeling of the Cr-Pd and Mo-Pd systems, JPE 21, 32-39 (2000). _assessment that models this phase; reports values for this phase_ ## HCP_A3 (Cr–Pd) - Id: `phase:cr-pd:hcp-a3`; status `assigned` - Structure: Mg · A3 · hP2 · P6_3/mmc (194); type `st:a3-mg-hp2`; tier A: standard phase name; confidence high - Stability: not stable in 1 calculated diagram(s) - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cr-pd:hcp-a3) Names (2): _corpus: _corpus:phase:cr-pd:hcp-a3 _tdb: _tdb:CrPd-00Gho-LB.tdb:HCP_A3 ### TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written [CrPd-00Gho-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CrPd-00Gho-LB.tdb): HCP_A3, type code %A, sha256 `a3ff7860baad43f0…` ~~~~text 41: PHASE HCP_A3 %A 2 1 0.5 ! 42: CONST HCP_A3 : CR PD : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1361/105497100770340390](https://doi.org/10.1361/105497100770340390) G. Ghosh, G. B. Olson, Thermodynamic modeling of the Cr-Pd and Mo-Pd systems, JPE 21, 32-39 (2000). _assessment that models this phase_ ## LIQUID (Cr–Pd) - Id: `phase:cr-pd:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 1576.87–4000 K, x(Pd) 0–1 - Literature: 2 values (2 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cr-pd:liquid) Names (3): _corpus: _corpus:phase:cr-pd:liquid _paper: _paper:10.1361/105497100770340390:L _tdb: _tdb:CrPd-00Gho-LB.tdb:LIQUID ### TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written [CrPd-00Gho-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CrPd-00Gho-LB.tdb): LIQUID, type code %, sha256 `a3ff7860baad43f0…` ~~~~text 26: PHASE LIQUID:L % 1 1 ! 27: CONST LIQUID:L : CR PD : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1361/105497100770340390](https://doi.org/10.1361/105497100770340390) G. Ghosh, G. B. Olson, Thermodynamic modeling of the Cr-Pd and Mo-Pd systems, JPE 21, 32-39 (2000). _assessment that models this phase; reports values for this phase_ ## Please cite - R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735970 - 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 Also cite B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). 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. ```bibtex @misc{orchid_phase_registry_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID-Registry: phase registry of binary systems}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23735970}, url = {https://doi.org/10.5281/zenodo.23735970}, note = {Version 1, machine-extracted} } @misc{orchid_data_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID data: umbrella record of the ORCHID datasets}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23736065}, url = {https://doi.org/10.5281/zenodo.23736065}, note = {Version 1, machine-extracted} } ``` --- Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).