# Al–Ca–Ti system > Al–Ca–Ti system: 12 accepted literature values (phase equilibrium 10, phase transition 2) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote. HTML: https://data.orchid-project.org/systems/AL-CA-TI.html · Markdown: https://data.orchid-project.org/systems/AL-CA-TI.md 12 accepted literature values from 1 paper(s) (experimental 10, model 2); 0 calculated phase diagram(s). 2 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV. Data: [JSON](https://data.orchid-project.org/literature/systems/AL-CA-TI.json) · [CSV](https://data.orchid-project.org/systems/AL-CA-TI.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AL-CA-TI) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AL-CA-TI.html) · [Markdown](https://data.orchid-project.org/systems/AL-CA-TI.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | experimental | 10 | | model | 2 | Table: Accepted values by property group | Property group | Values | |---|---:| | phase transition | 2 | | phase equilibrium | 10 | ## Other properties ### Phase transition (2) Table: Phase transition, Al–Ca–Ti system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Phase transition | 1573.15 K | 1573.15 | congruent transformation | model | [1] Hampl 2015 | p. 9; `ORC-R7XRQ3WMTF` | “For this choice the Al20CaTi2 phase is almost congruently melting at 1300 °C.” | | Phase transition | 2503.15 K | 2503.15 | congruent transformation | model | [1] Hampl 2015 | p. 9; `ORC-75IQ5S6OOS` | “However, the consequence of this extreme choice for the Gibbs energy of formation of Al20CaTi2, (-31000 ? 2T) J/mol-at., is the generation of a very large liquidus surface (primary crystallization field) of Al20CaTi2 with a congruent melting point of Al20CaTi2 at 2230 °C.” | ### Phase equilibrium (10) Table: Phase equilibrium, Al–Ca–Ti system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Phase composition | | 823.15 | Al2Ca; _Al2Ca: Al 0.721, Ca 0.278, Ti 0.001_ | experimental | [1] Hampl 2015 | Table 4, p. 7, row 2; `ORC-7EMXJSIRMJ` | | | Phase composition | | 823.15 | Al2Ca; _Al2Ca: Al 0.726, Ca 0.273, Ti 0.001_ | experimental | [1] Hampl 2015 | Table 4, p. 7, row 7; `ORC-FXOJVRN65G` | | | Phase composition | | 823.15 | Al2Ca; _Al2Ca: Al 0.722, Ca 0.278, Ti 0_ | experimental | [1] Hampl 2015 | Table 4, p. 7, row 1; `ORC-XBGRWJZRSF` | | | Phase composition | | 823.15 | Al2Ti(η); _Al2Ti(η): Al 0.673, Ca 0.005, Ti 0.322_ | experimental | [1] Hampl 2015 | Table 4, p. 7, row 4; `ORC-EQZQ6CLXDM` | | | Phase composition | | 823.15 | Al3Ti(ε); _Al3Ti(ε): Al 0.719, Ca 0.01, Ti 0.271_ | experimental | [1] Hampl 2015 | Table 4, p. 7, row 3; `ORC-KCN3J7JMVX` | | | Phase composition | | 823.15 | Al3Ti(ε); _Al3Ti(ε): Al 0.736, Ca 0.005, Ti 0.259_ | experimental | [1] Hampl 2015 | Table 4, p. 7, row 9; `ORC-P2PD4NIZQ7` | | | Phase composition | | 823.15 | AlTi(γ); _AlTi(γ): Al 0.591, Ca 0.009, Ti 0.4_ | experimental | [1] Hampl 2015 | Table 4, p. 7, row 10; `ORC-BVQD32NR2E` | | | Phase composition | | 823.15 | AlTi(γ); _AlTi(γ): Al 0.542, Ca 0.023, Ti 0.434_ | experimental | [1] Hampl 2015 | Table 4, p. 7, row 5; `ORC-QGLF5RKNCA` | | | Phase composition | | 823.15 | AlTi(γ); _AlTi(γ): Al 0.599, Ca 0.006, Ti 0.395_ | experimental | [1] Hampl 2015 | Table 4, p. 7, row 6; `ORC-X43XD4YWEY` | | | Phase composition | | 823.15 | αTi; _αTi: Al 0.022, Ca 0.009, Ti 0.969_ | experimental | [1] Hampl 2015 | Table 4, p. 7, row 11; `ORC-26ESO7LZEO` | | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. Milan Hampl, Rainer Schmid-Fetzer, Experimental investigation and thermodynamic assessment of the Al–Ca–Ti system, J Mater Sci 50, 5822-5832 (2015). [doi:10.1007/s10853-015-9130-x](https://doi.org/10.1007/s10853-015-9130-x) ## Please cite - 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 - 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 the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); 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). 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_literature_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23735569}, url = {https://doi.org/10.5281/zenodo.23735569}, 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 ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).