# Al–Ca system

> Al–Ca system: 253 accepted literature values (formation 96, crystal structure 78, invariant reaction 56, phase transition 23) and 7 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/AL-CA.html · Markdown: https://data.orchid-project.org/systems/AL-CA.md

253 accepted literature values from 4 paper(s) (experimental 65, model 82, DFT 80, unspecified 26); 7 calculated phase diagram(s). 12 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.json) · [CSV](https://data.orchid-project.org/systems/AL-CA.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AL-CA) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#AL-CA/AlCa-01Kev-LB.json) · [phases (13)](https://data.orchid-project.org/phases/pages/AL-CA.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AL-CA.html) · [Markdown](https://data.orchid-project.org/systems/AL-CA.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 65 |
| model | 82 |
| DFT | 80 |
| unspecified | 26 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 56 |
| phase transition | 23 |
| formation | 96 |
| crystal structure | 78 |

## Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Table: Assessments with a calculated phase diagram

| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| AlCa-01Kev-LB.tdb | D. Kevorkov, R. Schmid-Fetzer, A. Pisch, F. Hodaj, C. Colinet, Z. Metallkd., 92, 953-58(2001). [doi:10.1515/ijmr-2001-0173](https://doi.org/10.1515/ijmr-2001-0173) | `4e8733a4836b005cdd65aae181ecc19c3e4c5d55742a3e09179e1cbe8a2923f1` | [viewer](https://orchid-project.org/phase-diagrams/#AL-CA/AlCa-01Kev-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlCa-01Kev-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlCa-01Kev-LB.json) |
| AlCa-02Ozt-assoc.tdb | K. Ozturk, L.-Q. Chen, Z.-K. Liu, J. Alloys Compd., 340, 199-206(2002). [doi:10.1016/S0925-8388(01)01713-3](https://doi.org/10.1016/S0925-8388%2801%2901713-3) | `a4b933e44307c172395acfa3da932c6983fd657d70f6f8ccbeb184a45cdde28e` | [viewer](https://orchid-project.org/phase-diagrams/#AL-CA/AlCa-02Ozt-assoc.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlCa-02Ozt-assoc.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlCa-02Ozt-assoc.json) |
| AlCa-02Ozt.tdb | K. Ozturk, L.-Q. Chen, Z.-K. Liu, J. Alloys Compd., 340, 199-206(2002). [doi:10.1016/S0925-8388(01)01713-3](https://doi.org/10.1016/S0925-8388%2801%2901713-3) | `bc9f8ec064fb6aa89fdeb3081d98407a99f0bc5e625a1412d783528b266ee4b4` | [viewer](https://orchid-project.org/phase-diagrams/#AL-CA/AlCa-02Ozt.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlCa-02Ozt.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlCa-02Ozt.json) |
| AlCa-05Isl.tdb | F. Islam, M. Medraj, Can. Metall. Quart., 44, 523-36(2005). [doi:10.1179/cmq.2005.44.4.523](https://doi.org/10.1179/cmq.2005.44.4.523) | `595cde9e1659c565d74079d9104fdf1eaac723bfec572a9ee04c021587b6c00b` | [viewer](https://orchid-project.org/phase-diagrams/#AL-CA/AlCa-05Isl.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlCa-05Isl.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlCa-05Isl.json) |
| AlCa-05Ozt.tdb | K. Ozturk, Y. Zhong L.-Q. Chen, C. Wolverton, J.O. Sofo, Z.-K. Liu, Metall. Mater. Trans. A, 36A, 5-13(2005). [doi:10.1007/s11661-005-0133-0](https://doi.org/10.1007/s11661-005-0133-0) | `f614868b6276a66b73a67b234493c4211d9591469eeb48401cced54fe2638899` | [viewer](https://orchid-project.org/phase-diagrams/#AL-CA/AlCa-05Ozt.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlCa-05Ozt.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlCa-05Ozt.json) |
| AlCa-23Hal.tdb | B. Hallstedt, M. Noori, Calphad, 82, 102577(2023). [doi:10.1016/j.calphad.2023.102577](https://doi.org/10.1016/j.calphad.2023.102577) | `b7006b968c68038039c6fee8c9099584693c304b5982ee207a058d1253ad64e0` | [viewer](https://orchid-project.org/phase-diagrams/#AL-CA/AlCa-23Hal.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlCa-23Hal.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlCa-23Hal.json) |
| AlCa-94Ang.tdb | J.-C. Anglezio, C. Servant, I. Ansara, Calphad, 18, 273-309(1994). [doi:10.1016/0364-5916(94)90034-5](https://doi.org/10.1016/0364-5916%2894%2990034-5) | `d30f0116f37bdf756f5db3a613c2e23074b6fe11424bab4f252d8e0008f8b4b4` | [viewer](https://orchid-project.org/phase-diagrams/#AL-CA/AlCa-94Ang.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AlCa-94Ang.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AlCa-94Ang.json) |

Table: Calculated three-phase invariants (model, mole fraction of the second component)

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| AlCa-01Kev-LB.tdb | 974.51 | LIQUID (x(Ca) 0.09794) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-01Kev-LB.tdb | 974.51 | LIQUID (x(Ca) 0.0981) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-01Kev-LB.tdb | 974.51 | LIQUID (x(Ca) 0.09789) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-01Kev-LB.tdb | 906.36 | AL2CA_C15 (x(Ca) 0.33333) + ALCA (x(Ca) 0.5) + LIQUID (x(Ca) 0.61586) |
| AlCa-01Kev-LB.tdb | 906.36 | AL2CA_C15 (x(Ca) 0.33333) + ALCA (x(Ca) 0.5) + LIQUID (x(Ca) 0.61578) |
| AlCa-01Kev-LB.tdb | 886.18 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05101) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-01Kev-LB.tdb | 886.18 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05081) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-01Kev-LB.tdb | 886.18 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05073) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-01Kev-LB.tdb | 827.58 | AL3CA8 (x(Ca) 0.72727) + LIQUID (x(Ca) 0.79505) + BCC_A2 (x(Ca) 1) |
| AlCa-01Kev-LB.tdb | 825.21 | ALCA (x(Ca) 0.5) + LIQUID (x(Ca) 0.66201) + AL3CA8 (x(Ca) 0.72727) |
| AlCa-01Kev-LB.tdb | 825.21 | ALCA (x(Ca) 0.5) + LIQUID (x(Ca) 0.66193) + AL3CA8 (x(Ca) 0.72727) |
| AlCa-01Kev-LB.tdb | 825.21 | ALCA (x(Ca) 0.5) + LIQUID (x(Ca) 0.66207) + AL3CA8 (x(Ca) 0.72727) |
| AlCa-01Kev-LB.tdb | 716.03 | AL3CA8 (x(Ca) 0.72727) + FCC_A1 (x(Ca) 1) + BCC_A2 (x(Ca) 1) |
| AlCa-02Ozt-assoc.tdb | 974.04 | LIQUID (x(Ca) 0.09891) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-02Ozt-assoc.tdb | 905.48 | AL2CA_C15 (x(Ca) 0.33333) + AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.61969) |
| AlCa-02Ozt-assoc.tdb | 885.91 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05451) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-02Ozt-assoc.tdb | 830.48 | AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.66404) + AL3CA8 (x(Ca) 0.72727) |
| AlCa-02Ozt-assoc.tdb | 822.42 | AL3CA8 (x(Ca) 0.72727) + LIQUID (x(Ca) 0.80544) + BCC_A2 (x(Ca) 1) |
| AlCa-02Ozt-assoc.tdb | 716.03 | AL3CA8 (x(Ca) 0.72727) + FCC_A1 (x(Ca) 1) + BCC_A2 (x(Ca) 1) |
| AlCa-02Ozt.tdb | 976.05 | LIQUID (x(Ca) 0.09322) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-02Ozt.tdb | 976.05 | LIQUID (x(Ca) 0.09322) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-02Ozt.tdb | 976.05 | LIQUID (x(Ca) 0.09316) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-02Ozt.tdb | 905.7 | AL2CA_C15 (x(Ca) 0.33333) + AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.62294) |
| AlCa-02Ozt.tdb | 905.7 | AL2CA_C15 (x(Ca) 0.33333) + AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.62276) |
| AlCa-02Ozt.tdb | 881.2 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05453) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-02Ozt.tdb | 881.2 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05446) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-02Ozt.tdb | 881.2 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05446) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-02Ozt.tdb | 837.28 | AL3CA8 (x(Ca) 0.72727) + LIQUID (x(Ca) 0.7779) + BCC_A2 (x(Ca) 1) |
| AlCa-02Ozt.tdb | 837.28 | AL3CA8 (x(Ca) 0.72727) + LIQUID (x(Ca) 0.77829) + BCC_A2 (x(Ca) 1) |
| AlCa-02Ozt.tdb | 829.38 | AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.66814) + AL3CA8 (x(Ca) 0.72727) |
| AlCa-02Ozt.tdb | 829.38 | AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.6683) + AL3CA8 (x(Ca) 0.72727) |
| AlCa-02Ozt.tdb | 716.03 | AL3CA8 (x(Ca) 0.72727) + FCC_A1 (x(Ca) 1) + BCC_A2 (x(Ca) 1) |
| AlCa-05Isl.tdb | 975.41 | LIQUID (x(Ca) 0.09082) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-05Isl.tdb | 975.41 | LIQUID (x(Ca) 0.09092) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-05Isl.tdb | 975.41 | LIQUID (x(Ca) 0.09073) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-05Isl.tdb | 907.62 | AL2CA_C15 (x(Ca) 0.33333) + AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.60954) |
| AlCa-05Isl.tdb | 907.62 | AL2CA_C15 (x(Ca) 0.33333) + AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.60948) |
| AlCa-05Isl.tdb | 886 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05268) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-05Isl.tdb | 886 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05248) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-05Isl.tdb | 886 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05242) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-05Isl.tdb | 827.88 | AL3CA8 (x(Ca) 0.72727) + LIQUID (x(Ca) 0.7969) + BCC_A2 (x(Ca) 1) |
| AlCa-05Isl.tdb | 825.25 | AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.65973) + AL3CA8 (x(Ca) 0.72727) |
| AlCa-05Isl.tdb | 825.25 | AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.65978) + AL3CA8 (x(Ca) 0.72727) |
| AlCa-05Isl.tdb | 716.03 | AL3CA8 (x(Ca) 0.72727) + FCC_A1 (x(Ca) 1) + BCC_A2 (x(Ca) 1) |
| AlCa-05Ozt.tdb | 973.68 | LIQUID (x(Ca) 0.09191) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33328) |
| AlCa-05Ozt.tdb | 973.68 | LIQUID (x(Ca) 0.09188) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33328) |
| AlCa-05Ozt.tdb | 901.98 | AL2CA_C15 (x(Ca) 0.34053) + AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.61521) |
| AlCa-05Ozt.tdb | 884.24 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05315) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-05Ozt.tdb | 884.24 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.053) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-05Ozt.tdb | 884.24 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05294) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-05Ozt.tdb | 828.1 | AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.6634) + AL3CA8 (x(Ca) 0.72727) |
| AlCa-05Ozt.tdb | 827.8 | AL3CA8 (x(Ca) 0.72727) + LIQUID (x(Ca) 0.7974) + BCC_A2 (x(Ca) 1) |
| AlCa-05Ozt.tdb | 716.03 | AL3CA8 (x(Ca) 0.72727) + FCC_A1 (x(Ca) 1) + BCC_A2 (x(Ca) 1) |
| AlCa-23Hal.tdb | 973.43 | LIQUID (x(Ca) 0.09177) + AL4CA_D13 (x(Ca) 0.2) + C15_LAVES (x(Ca) 0.33281) |
| AlCa-23Hal.tdb | 973.43 | LIQUID (x(Ca) 0.09176) + AL4CA_D13 (x(Ca) 0.2) + C15_LAVES (x(Ca) 0.33281) |
| AlCa-23Hal.tdb | 899.99 | C15_LAVES (x(Ca) 0.3453) + AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.61667) |
| AlCa-23Hal.tdb | 884.4 | FCC_A1 (x(Ca) 3.600e-4) + LIQUID (x(Ca) 0.05321) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-23Hal.tdb | 884.4 | FCC_A1 (x(Ca) 3.600e-4) + LIQUID (x(Ca) 0.05306) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-23Hal.tdb | 828.68 | AL3CA8 (x(Ca) 0.72727) + LIQUID (x(Ca) 0.79572) + BCC_A2 (x(Ca) 0.99319) |
| AlCa-23Hal.tdb | 828.68 | AL3CA8 (x(Ca) 0.72727) + LIQUID (x(Ca) 0.79584) + BCC_A2 (x(Ca) 0.99319) |
| AlCa-23Hal.tdb | 828.1 | AL14CA13 (x(Ca) 0.48148) + LIQUID (x(Ca) 0.6634) + AL3CA8 (x(Ca) 0.72727) |
| AlCa-23Hal.tdb | 740.74 | AL3CA8 (x(Ca) 0.72727) + FCC_A1 (x(Ca) 0.99234) + BCC_A2 (x(Ca) 0.99724) |
| AlCa-23Hal.tdb | 740.74 | AL3CA8 (x(Ca) 0.72727) + FCC_A1 (x(Ca) 0.99234) + BCC_A2 (x(Ca) 0.99724) |
| AlCa-94Ang.tdb | 968.26 | LIQUID (x(Ca) 0.10003) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-94Ang.tdb | 968.26 | LIQUID (x(Ca) 0.10024) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-94Ang.tdb | 968.26 | LIQUID (x(Ca) 0.09997) + AL4CA_D13 (x(Ca) 0.2) + AL2CA_C15 (x(Ca) 0.33333) |
| AlCa-94Ang.tdb | 901.64 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05642) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-94Ang.tdb | 901.64 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05627) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-94Ang.tdb | 901.64 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.05611) + AL4CA_D13 (x(Ca) 0.2) |
| AlCa-94Ang.tdb | 817.45 | AL2CA_C15 (x(Ca) 0.33333) + LIQUID (x(Ca) 0.64782) + BCC_A2 (x(Ca) 1) |
| AlCa-94Ang.tdb | 716.03 | AL2CA_C15 (x(Ca) 0.33333) + FCC_A1 (x(Ca) 1) + BCC_A2 (x(Ca) 1) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/AL/AL-CA.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/AL/AL-CA.json) · [CALPHAD hull AlCa-01Kev-LB](https://data.orchid-project.org/hulls/calphad-sgte/AL/AL-CA--AlCa-01Kev-LB.json) · [CALPHAD hull AlCa-02Ozt-assoc](https://data.orchid-project.org/hulls/calphad-sgte/AL/AL-CA--AlCa-02Ozt-assoc.json) · [CALPHAD hull AlCa-02Ozt](https://data.orchid-project.org/hulls/calphad-sgte/AL/AL-CA--AlCa-02Ozt.json) · [CALPHAD hull AlCa-05Isl](https://data.orchid-project.org/hulls/calphad-sgte/AL/AL-CA--AlCa-05Isl.json) · [CALPHAD hull AlCa-05Ozt](https://data.orchid-project.org/hulls/calphad-sgte/AL/AL-CA--AlCa-05Ozt.json) · [CALPHAD hull AlCa-94Ang](https://data.orchid-project.org/hulls/calphad-sgte/AL/AL-CA--AlCa-94Ang.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Al–Ca system (56)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 976.1 | peritectic: Liquid + C15 = Al4Ca | Liquid: Ca 0.0932; C15: Ca 0.333333; Al4Ca: Ca 0.2 | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 37; `ORC-CWPYHG34HI` |  |
| 974.3 | peritectic: Liquid + C15 = Al4Ca | Liquid: Ca 0.098; C15: Ca 0.333333; Al4Ca: Ca 0.2 | model | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0173) | Table V, p. 7, row 38; `ORC-CDF3MIIBFL` |  |
| 974.3 | peritectic: L + Al2Ca -> Al4Ca | L: Ca 0.098; Al2Ca: Ca 0.333333; Al4Ca: Ca 0.2 | unspecified | [2] ISLAM 2005; _cites ref. 26_ | Table IV, p. 8, row 25; `ORC-SE5ZZK5NKQ` |  |
| 974.02 | peritectic: L + Al2Ca -> Al4Ca | L: Ca 0.0906; Al2Ca: Ca 0.333333; Al4Ca: Ca 0.2 | model | [2] ISLAM 2005 | Table IV, p. 8, row 27; `ORC-JTZZH2SYAG` |  |
| 974 | peritectic: L + Al2Ca -> Al4Ca | L: Ca 0.0989; Al2Ca: Ca 0.333333; Al4Ca: Ca 0.2 | unspecified | [2] ISLAM 2005; _cites ref. 28_ | Table IV, p. 8, row 26; `ORC-6OZCWXW5S3` |  |
| 974 | peritectic: Liquid + C15 = Al4Ca | Liquid: Ca 0.0989; C15: Ca 0.333333; Al4Ca: Ca 0.2 | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 36; `ORC-WNNWNSDSZT` |  |
| 973.7 | peritectic: Liquid + C15 = Al4Ca | Liquid: Ca 0.0919; C15: Ca 0.333333; Al4Ca: Ca 0.2 | model | [1] Ozturk 2005 | Table V, p. 7, row 39; `ORC-D736OZZASL` |  |
| 973 | peritectic: L + Al2Ca -> Al4Ca | Al2Ca: Ca 0.333333; Al4Ca: Ca 0.2 | unspecified | [2] ISLAM 2005; _cites ref. 25_ | Table IV, p. 8, row 24; `ORC-DLFHMKWJHK` |  |
| 973 | peritectic: Liquid + C15 = Al4Ca | Liquid: Ca 0.1; C15: Ca 0.333333; Al4Ca: Ca 0.2 | experimental | [1] Ozturk 2005; _cites Matsuyama 1928_ | Table V, p. 7, row 34; `ORC-EP4ZTRGEJH` |  |
| 973 | peritectic: Liquid + C15 = Al4Ca | C15: Ca 0.333333; Al4Ca: Ca 0.2 | experimental | [1] Ozturk 2005 | Table V, p. 7, row 35; `ORC-M2ZTBFLJ2G` |  |
| 973 | peritectic: L + Al2Ca -> Al4Ca | L: Ca 0.1; Al2Ca: Ca 0.333333; Al4Ca: Ca 0.2 | unspecified | [2] ISLAM 2005; _cites ref. 24_ | Table IV, p. 8, row 23; `ORC-OSULBUV5PH` |  |
| 907.46 | peritectic: L+ Al2Ca -> Al14Ca13 | L: Ca 0.6095; Al2Ca: Ca 0.333333; Al14Ca13: Ca 0.481481 | model | [2] ISLAM 2005 | Table IV, p. 8, row 31; `ORC-CW455HRSAC` |  |
| 906.2 | peritectic: Liquid + C15 = Al14Ca13 | Liquid: Ca 0.616; C15: Ca 0.333333; Al14Ca13: Ca 0.481481 | model | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0173) | Table V, p. 7, row 43; `ORC-PLKRWAJSIG` |  |
| 906.2 | peritectic: L+ Al2Ca -> Al14Ca13 | L: Ca 0.616; Al2Ca: Ca 0.333333; Al14Ca13: Ca 0.481481 | unspecified | [2] ISLAM 2005; _cites ref. 26_ | Table IV, p. 8, row 29; `ORC-UX3ZUKBPZ6` |  |
| 906 | peritectic: Liquid + C15 = Al14Ca13 | Liquid: Ca 0.616; C15: Ca 0.333333; Al14Ca13: Ca 0.481481 | experimental | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0172) | Table V, p. 7, row 40; `ORC-34D7QJZL3T` |  |
| 906 | peritectic: Al14Ca13 -> liquid + Al2Ca |  | experimental | [3] Ozturk 2002; _cites Kevorkov 2001_ | p. 3; `ORC-NOJXZMFKLJ` | “It melts incongruently at the peritectic reaction temperature of about 906 K forming liquid (61.6 at.% Ca) and Al 2 Ca phases \[16\].” |
| 906 | peritectic: L+ Al2Ca -> Al14Ca13 | Al2Ca: Ca 0.333333; Al14Ca13: Ca 0.481481 | unspecified | [2] ISLAM 2005; _cites ref. 25_ | Table IV, p. 8, row 28; `ORC-Z2YMTL4P72` |  |
| 905.7 | peritectic: Liquid + C15 = Al14Ca13 | Liquid: Ca 0.6229; C15: Ca 0.333333; Al14Ca13: Ca 0.481481 | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 42; `ORC-NCIL24Q6KD` |  |
| 905.5 | peritectic: Liquid + C15 = Al14Ca13 | Liquid: Ca 0.6197; C15: Ca 0.333333; Al14Ca13: Ca 0.481481 | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 41; `ORC-I4KE4T5736` |  |
| 905.5 | peritectic: L+ Al2Ca -> Al14Ca13 | L: Ca 0.6197; Al2Ca: Ca 0.333333; Al14Ca13: Ca 0.481481 | unspecified | [2] ISLAM 2005; _cites ref. 28_ | Table IV, p. 8, row 30; `ORC-OCMSRMZQFJ` |  |
| 905 | peritectic: Liquid + C15 = Al14Ca13 | Liquid: Ca 0.6129; C15: Ca 0.333333; Al14Ca13: Ca 0.481481 | model | [1] Ozturk 2005 | Table V, p. 7, row 44; `ORC-7RMJCWK2DK` |  |
| 889 | eutectic: L -> Al4Ca+ Al-fcc | L: Ca 0.052; Al4Ca: Ca 0.2 | unspecified | [2] ISLAM 2005; _cites ref. 24_ | Table IV, p. 8, row 10; `ORC-PTG5WZUN3V` |  |
| 889 | eutectic: Liquid = Al + Al4Ca | Liquid: Ca 0.052; Al4Ca: Ca 0.2 | experimental | [1] Ozturk 2005; _cites Matsuyama 1928_ | Table V, p. 7, row 3; `ORC-V43H3NM4ZV` |  |
| 886 | eutectic: L -> Al4Ca+ Al-fcc | L: Ca 0.051; Al4Ca: Ca 0.2 | unspecified | [2] ISLAM 2005; _cites ref. 26_ | Table IV, p. 8, row 12; `ORC-DHQTOWUXS7` |  |
| 886 | eutectic: L -> Al4Ca+ Al-fcc | Al4Ca: Ca 0.2 | unspecified | [2] ISLAM 2005; _cites ref. 25_ | Table IV, p. 8, row 11; `ORC-QLPY3LVQYS` |  |
| 886 | eutectic: Liquid = Al + Al4Ca | Al4Ca: Ca 0.2 | experimental | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0172) | Table V, p. 7, row 4; `ORC-UFRUXEY2HB` |  |
| 886 | eutectic: Liquid = Al + Al4Ca | Liquid: Ca 0.064; Al4Ca: Ca 0.2 | experimental | [1] Ozturk 2005; _cites Bozza 1928_ | Table V, p. 7, row 2; `ORC-YAZBHKUIZO` |  |
| 886 | eutectic: Liquid = Al + Al4Ca | Liquid: Ca 0.051; Al4Ca: Ca 0.2 | model | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0173) | Table V, p. 7, row 7; `ORC-ZQLWHYVV4P` |  |
| 885.9 | eutectic: Liquid = Al + Al4Ca | Liquid: Ca 0.0545; Al4Ca: Ca 0.2 | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 5; `ORC-6TTLJHP3YX` |  |
| 885.9 | eutectic: L -> Al4Ca+ Al-fcc | L: Ca 0.052; Al4Ca: Ca 0.2 | model | [2] ISLAM 2005 | Table IV, p. 8, row 14; `ORC-XJM3ESA54L` |  |
| 885.9 | eutectic: L -> Al4Ca+ Al-fcc | L: Ca 0.0545; Al4Ca: Ca 0.2 | unspecified | [2] ISLAM 2005; _cites ref. 28_ | Table IV, p. 8, row 13; `ORC-XQJV62ETQ2` |  |
| 884.2 | eutectic: Liquid = Al + Al4Ca | Liquid: Ca 0.053; Al4Ca: Ca 0.2 | model | [1] Ozturk 2005 | Table V, p. 7, row 8; `ORC-MPSGM3DXOF` |  |
| 884 | eutectic: Liquid = Al + Al4Ca | Liquid: Ca 0.056; Al4Ca: Ca 0.2 | experimental | [1] Ozturk 2005; _cites Donski 1908_ [doi](https://doi.org/10.1002/zaac.19080570109) | Table V, p. 7, row 1; `ORC-PWCITDEOCO` |  |
| 881.2 | eutectic: Liquid = Al + Al4Ca | Liquid: Ca 0.0545; Al4Ca: Ca 0.2 | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 6; `ORC-EPI4WQ5NEJ` |  |
| 837.3 | eutectic: Liquid = Al3Ca8 + βCa | Liquid: Ca 0.7779; Al3Ca8: Ca 0.727273 | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 20; `ORC-VYZNFYUIGK` |  |
| 833 | eutectic: L -> Al14Ca13+ Ca-bcc | Al14Ca13: Ca 0.481481 | unspecified | [2] ISLAM 2005; _cites ref. 25_ | Table IV, p. 8, row 19; `ORC-KMZ6CMVQ3D` |  |
| 833 | eutectic: Liquid = Al3Ca8 + βCa | Liquid: Ca 0.795; Al3Ca8: Ca 0.727273 | experimental | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0172) | Table V, p. 7, row 18; `ORC-U57BI5VPG6` |  |
| 830.5 | eutectic: Liquid = Al14Ca13 + Al3Ca8 | Liquid: Ca 0.664; Al14Ca13: Ca 0.481481; Al3Ca8: Ca 0.727273 | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 12; `ORC-MN2JE6L2VQ` |  |
| 830.5 | eutectic: L -> Al14Ca13+ Al3Ca8 | L: Ca 0.664; Al14Ca13: Ca 0.481481; Al3Ca8: Ca 0.727273 | unspecified | [2] ISLAM 2005; _cites ref. 28_ | Table IV, p. 8, row 17; `ORC-ZEIEXINNJB` |  |
| 829.4 | eutectic: Liquid = Al14Ca13 + Al3Ca8 | Liquid: Ca 0.6681; Al14Ca13: Ca 0.481481; Al3Ca8: Ca 0.727273 | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 13; `ORC-A6UHVM5VSO` |  |
| 829 | eutectic: L -> Al14Ca13+ Al3Ca8 | Al14Ca13: Ca 0.481481; Al3Ca8: Ca 0.727273 | unspecified | [2] ISLAM 2005; _cites ref. 25_ | Table IV, p. 8, row 15; `ORC-FP2C7KS44E` |  |
| 829 | eutectic: Liquid = Al14Ca13 + Al3Ca8 | Liquid: Ca 0.662; Al14Ca13: Ca 0.481481; Al3Ca8: Ca 0.727273 | experimental | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0172) | Table V, p. 7, row 11; `ORC-IA6GACXBCJ` |  |
| 828.1 | eutectic: Liquid = Al14Ca13 + Al3Ca8 | Liquid: Ca 0.6634; Al14Ca13: Ca 0.481481; Al3Ca8: Ca 0.727273 | model | [1] Ozturk 2005 | Table V, p. 7, row 15; `ORC-EXWSE3LIKY` |  |
| 827.85 | eutectic: L -> Al14Ca13+ Ca-bcc | L: Ca 0.7969; Al14Ca13: Ca 0.481481 | model | [2] ISLAM 2005 | Table IV, p. 8, row 22; `ORC-VVLIX7QXD3` |  |
| 827.8 | eutectic: Liquid = Al3Ca8 + βCa | Liquid: Ca 0.7975; Al3Ca8: Ca 0.727273 | model | [1] Ozturk 2005 | Table V, p. 7, row 22; `ORC-WSV2RMJ44R` |  |
| 827.5 | eutectic: Liquid = Al3Ca8 + βCa | Liquid: Ca 0.795; Al3Ca8: Ca 0.727273 | model | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0173) | Table V, p. 7, row 21; `ORC-EMSRXIOK7V` |  |
| 827.5 | eutectic: L -> Al14Ca13+ Ca-bcc | L: Ca 0.795; Al14Ca13: Ca 0.481481 | unspecified | [2] ISLAM 2005; _cites ref. 26_ | Table IV, p. 8, row 20; `ORC-JAUSLOIEAE` |  |
| 825.24 | eutectic: L -> Al14Ca13+ Al3Ca8 | L: Ca 0.6597; Al14Ca13: Ca 0.481481; Al3Ca8: Ca 0.727273 | model | [2] ISLAM 2005 | Table IV, p. 8, row 18; `ORC-OKEFBXRAY4` |  |
| 825.1 | eutectic: Liquid = Al14Ca13 + Al3Ca8 | Liquid: Ca 0.622; Al14Ca13: Ca 0.481481; Al3Ca8: Ca 0.727273 | model | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0173) | Table V, p. 7, row 14; `ORC-4BP4GG37BD` |  |
| 825.1 | eutectic: L -> Al14Ca13+ Al3Ca8 | L: Ca 0.662; Al14Ca13: Ca 0.481481; Al3Ca8: Ca 0.727273 | unspecified | [2] ISLAM 2005; _cites ref. 26_ | Table IV, p. 8, row 16; `ORC-WQYWOYPSKR` |  |
| 822.5 | eutectic: L -> Al14Ca13+ Ca-bcc | L: Ca 0.8053; Al14Ca13: Ca 0.481481 | unspecified | [2] ISLAM 2005; _cites ref. 28_ | Table IV, p. 8, row 21; `ORC-DV2UMNHU6D` |  |
| 822.5 | eutectic: Liquid = Al3Ca8 + βCa | Liquid: Ca 0.8053; Al3Ca8: Ca 0.727273 | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 19; `ORC-H3I3VPV4AI` |  |
| 820 | eutectic: Liquid = Al3Ca8 + βCa | Al3Ca8: Ca 0.727273 | experimental | [1] Ozturk 2005; _cites Donski 1908_ [doi](https://doi.org/10.1002/zaac.19080570109) | Table V, p. 7, row 17; `ORC-JTP4H7ZJAP` |  |
| 820 | eutectic: Liquid = Al14Ca13 + Al3Ca8 | Al14Ca13: Ca 0.481481; Al3Ca8: Ca 0.727273 | experimental | [1] Ozturk 2005; _cites Donski 1908_ [doi](https://doi.org/10.1002/zaac.19080570109) | Table V, p. 7, row 10; `ORC-XNCTZ2SWF4` |  |
| 818 | eutectic: Liquid = Al14Ca13 + Al3Ca8 | Al14Ca13: Ca 0.481481; Al3Ca8: Ca 0.727273 | experimental | [1] Ozturk 2005; _cites Matsuyama 1928_ | Table V, p. 7, row 9; `ORC-AWRX62W2EK` |  |
| 818 | eutectic: Liquid = Al3Ca8 + βCa | Al3Ca8: Ca 0.727273 | experimental | [1] Ozturk 2005; _cites Matsuyama 1928_ | Table V, p. 7, row 16; `ORC-R2ZRJV3MP3` |  |

## Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from [dft_parity.json](https://data.orchid-project.org/literature/dft_parity.json).

Table: Enthalpies of formation, Al–Ca system (65)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Al14Ca13 | [Al14Ca13](https://data.orchid-project.org/compounds/Al14Ca13.html) | -26.06 kJ/mol-atom | 298.15 | model | -25.073 (mp-aaacpwwt) | -25.969 (oqmd-20962) | [2] ISLAM 2005 | Table V, p. 9, row 16; `ORC-V5VZIMYFHZ.c4dcbc` |  |
| Al14Ca13 | [Al14Ca13](https://data.orchid-project.org/compounds/Al14Ca13.html) | -22.8 kJ/mol-atom | 800 | model | -25.073 (mp-aaacpwwt) | -25.969 (oqmd-20962) | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 15; `ORC-7RIDVI66SQ.7692c5` |  |
| Al14Ca13 (AlCa) |  | -28.904 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 36; `ORC-OUCQVWPDTV.ee70fc` |  |
| Al14Ca13 (AlCa) |  | -28.386 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 35; `ORC-7J2LUXC77P.edec96` |  |
| Al14Ca13 (AlCa) |  | -27.689 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 39; `ORC-7FT4GX35DF.9458bf` |  |
| Al14Ca13 (AlCa) | [Al14Ca13](https://data.orchid-project.org/compounds/Al14Ca13.html) | -24.843 kJ/mol-atom |  | model | -25.073 (mp-aaacpwwt) | -25.969 (oqmd-20962) | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table IV, p. 5, row 37; `ORC-YGPZGOLQTD.c1b062` |  |
| Al14Ca13 (AlCa) | [Al14Ca13](https://data.orchid-project.org/compounds/Al14Ca13.html) | -22.8 kJ/mol-atom |  | model | -25.073 (mp-aaacpwwt) | -25.969 (oqmd-20962) | [1] Ozturk 2005; _cites Kevorkov 2001_ | Table IV, p. 5, row 38; `ORC-6UZTPUZLR7.29a4ab` |  |
| Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -34.3 kJ/mol-atom ± 3.5 | 800 | experimental | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [2] ISLAM 2005; _cites ref. 35_ | Table V, p. 9, row 3; `ORC-EVWHCHSGOM.95afda` |  |
| Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -33.4 kJ/mol-atom ± 0.6 | 1038 | experimental | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [2] ISLAM 2005; _cites ref. 31_ | Table V, p. 9, row 2; `ORC-VM6THGCH2Z` |  |
| Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -31.28 kJ/mol-atom ± 0.46 | 788 | experimental | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [2] ISLAM 2005; _cites ref. 34_ | Table V, p. 9, row 1; `ORC-4VF2YU5IU5.e8975a` |  |
| Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -29.7 kJ/mol-atom | 800 | model | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 5; `ORC-UW6X4DZ2U2.ada1d7` |  |
| Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -29.4 kJ/mol-atom ± 0.9 | 298.15 | experimental | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 4; `ORC-UTECLILISV` |  |
| Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -29.28 kJ/mol-atom | 298.15 | model | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [2] ISLAM 2005 | Table V, p. 9, row 6; `ORC-SNUCDIATXV.ffb8e2` |  |
| Al3Ca8 |  | -18.705 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 41; `ORC-EFRE3KLDTL.1688b1` |  |
| Al3Ca8 |  | -18.301 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 40; `ORC-H5Q7XJZTLL.130450` |  |
| Al3Ca8 |  | -17.679 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 44; `ORC-LJMIPJOCL3.e94931` |  |
| Al3Ca8 | [Al3Ca8](https://data.orchid-project.org/compounds/Al3Ca8.html) | -15.63 kJ/mol-atom | 298.15 | model | -14.913 (mp-aaacptlo) | -16.15 (oqmd-20963) | [2] ISLAM 2005 | Table V, p. 9, row 14; `ORC-3VEUOFIRK3.855431` |  |
| Al3Ca8 | [Al3Ca8](https://data.orchid-project.org/compounds/Al3Ca8.html) | -14 kJ/mol-atom |  | model | -14.913 (mp-aaacptlo) | -16.15 (oqmd-20963) | [1] Ozturk 2005; _cites Kevorkov 2001_ | Table IV, p. 5, row 43; `ORC-WNYDTZA554.005e21` |  |
| Al3Ca8 | [Al3Ca8](https://data.orchid-project.org/compounds/Al3Ca8.html) | -14 kJ/mol-atom | 800 | model | -14.913 (mp-aaacptlo) | -16.15 (oqmd-20963) | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 13; `ORC-Z2ONGEH2AN.a3e0a0` |  |
| Al3Ca8 | [Al3Ca8](https://data.orchid-project.org/compounds/Al3Ca8.html) | -13.7 kJ/mol-atom ± 1.3 | 298.15 | experimental | -14.913 (mp-aaacptlo) | -16.15 (oqmd-20963) | [1] Ozturk 2005; _cites Kevorkov 2001_ | Table IV, p. 5, row 45; `ORC-DJDAA52VRM.636ac4` |  |
| Al3Ca8 | [Al3Ca8](https://data.orchid-project.org/compounds/Al3Ca8.html) | -13.7 kJ/mol-atom ± 1.3 | 298.15 | experimental | -14.913 (mp-aaacptlo) | -16.15 (oqmd-20963) | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 12; `ORC-SS77NMX7TQ` |  |
| Al3Ca8 | [Al3Ca8](https://data.orchid-project.org/compounds/Al3Ca8.html) | -12.83 kJ/mol-atom |  | model | -14.913 (mp-aaacptlo) | -16.15 (oqmd-20963) | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table IV, p. 5, row 42; `ORC-QW3V5BNQH2.d895ef` |  |
| Al4Ca | [Al4Ca](https://data.orchid-project.org/compounds/Al4Ca.html) | -28.968 kJ/mol-atom |  | model | -18.794 (mp-aaaaacph) | -18.472 (oqmd-2168879) | [1] Ozturk 2005; _cites Itkin 1988_ [doi](https://doi.org/10.1007/bf02883160) | Table IV, p. 5, row 4; `ORC-5BNEP3SMRJ.9e2ab6` |  |
| Al4Ca |  | -21.615 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 3; `ORC-J5T6TBKDML.ce13f5` |  |
| Al4Ca | [Al4Ca](https://data.orchid-project.org/compounds/Al4Ca.html) | -21 kJ/mol-atom | 800 | model | -18.794 (mp-aaaaacph) | -18.472 (oqmd-2168879) | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 10; `ORC-PM3XOMMOPJ.ef7fa2` |  |
| Al4Ca | [Al4Ca](https://data.orchid-project.org/compounds/Al4Ca.html) | -21 kJ/mol-atom |  | model | -18.794 (mp-aaaaacph) | -18.472 (oqmd-2168879) | [1] Ozturk 2005; _cites Kevorkov 2001_ | Table IV, p. 5, row 6; `ORC-Y4OP5S2EAC.694bd0` |  |
| Al4Ca | [Al4Ca](https://data.orchid-project.org/compounds/Al4Ca.html) | -20.2 kJ/mol-atom ± 0.4 | 298.15 | experimental | -18.794 (mp-aaaaacph) | -18.472 (oqmd-2168879) | [1] Ozturk 2005; _cites Veleckis 1981_ [doi](https://doi.org/10.1016/0022-5088%2881%2990098-9) | Table IV, p. 5, row 9; `ORC-IGHKVCH3WK.e8a495` |  |
| Al4Ca | [Al4Ca](https://data.orchid-project.org/compounds/Al4Ca.html) | -20.18 kJ/mol-atom ± 0.38 | 788 | experimental | -18.794 (mp-aaaaacph) | -18.472 (oqmd-2168879) | [2] ISLAM 2005; _cites ref. 34_ | Table V, p. 9, row 7; `ORC-V6C7CC5AWB.96c99b` |  |
| Al4Ca |  | -20.034 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 7; `ORC-ARDICSAW5Q.302cb1` |  |
| Al4Ca |  | -19.56 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 1; `ORC-72BYE267EP.c00d79` |  |
| Al4Ca | [Al4Ca](https://data.orchid-project.org/compounds/Al4Ca.html) | -19.4 kJ/mol-atom ± 3.3 | 298.15 | experimental | -18.794 (mp-aaaaacph) | -18.472 (oqmd-2168879) | [1] Ozturk 2005; _cites Notin 1982_ [doi](https://doi.org/10.1016/0364-5916%2882%2990015-3) | Table IV, p. 5, row 10; `ORC-NEIOD6VMFX.382bad` |  |
| Al4Ca | [Al4Ca](https://data.orchid-project.org/compounds/Al4Ca.html) | -19.4 kJ/mol-atom ± 3.3 | 800 | experimental | -18.794 (mp-aaaaacph) | -18.472 (oqmd-2168879) | [2] ISLAM 2005; _cites ref. 35_ | Table V, p. 9, row 9; `ORC-XCFMJUUOJ7.2df71d` |  |
| Al4Ca | [Al4Ca](https://data.orchid-project.org/compounds/Al4Ca.html) | -19.248 kJ/mol-atom |  | model | -18.794 (mp-aaaaacph) | -18.472 (oqmd-2168879) | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table IV, p. 5, row 5; `ORC-YFAK27MANA.76e24e` |  |
| Al4Ca |  | -19.208 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 2; `ORC-2KOSDBV2KV.80c689` |  |
| Al4Ca | [Al4Ca](https://data.orchid-project.org/compounds/Al4Ca.html) | -18.7 kJ/mol-atom ± 0.3 | 1038 | experimental | -18.794 (mp-aaaaacph) | -18.472 (oqmd-2168879) | [2] ISLAM 2005; _cites ref. 31_ | Table V, p. 9, row 8; `ORC-6QKP4VARKE` |  |
| Al4Ca | [Al4Ca](https://data.orchid-project.org/compounds/Al4Ca.html) | -18.7 kJ/mol-atom ± 0.3 | 298.15 | experimental | -18.794 (mp-aaaaacph) | -18.472 (oqmd-2168879) | [1] Ozturk 2005; _cites Notin 1995_ [doi](https://doi.org/10.1016/0925-8388%2894%2906001-0) | Table IV, p. 5, row 8; `ORC-PNDWNRMG4M.781315` |  |
| Al4Ca | [Al4Ca](https://data.orchid-project.org/compounds/Al4Ca.html) | -17.27 kJ/mol-atom | 298.15 | model | -18.794 (mp-aaaaacph) | -18.472 (oqmd-2168879) | [2] ISLAM 2005 | Table V, p. 9, row 11; `ORC-NEVTWCUSSA.579ca6` |  |
| AlCa | [AlCa](https://data.orchid-project.org/compounds/AlCa.html) | -22.8 kJ/mol-atom | 800 | model |  | -25.348 (oqmd-1782653) | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 15; `ORC-7RIDVI66SQ.83d39e` |  |
| Al₄Ca |  | -219.5 kJ/mol (basis unstated) ± 20 | 298.15 | experimental |  |  | [4] Anglezio 1994; _cites ref. 59Koc_ | Table II, p. 8, row 2; `ORC-LXRU5OQKZV.15fe71` |  |
| Al₄Ca |  | -209 kJ/mol (basis unstated) ± 30 | 298.15 | experimental |  |  | [4] Anglezio 1994; _cites ref. 59Koc_ | Table II, p. 8, row 1; `ORC-EJFC52C5XG.dc96fc` |  |
| Al₄Ca |  | -100.9 kJ/mol (basis unstated) ± 1.9 | 298.15 | experimental |  |  | [4] Anglezio 1994; _cites ref. 81Vel_ | Table II, p. 8, row 9; `ORC-5XLNAMXD2F.b40b90` |  |
| Al₄Ca |  | -100.509 kJ/mol (basis unstated) | 800 | model |  |  | [4] Anglezio 1994 | Table II, p. 8, row 8; `ORC-VFOS3PDKWJ.035384` |  |
| Al₄Ca |  | -97 kJ/mol (basis unstated) ± 16.5 | 800 | experimental |  |  | [4] Anglezio 1994; _cites ref. 82Not2_ | Table II, p. 8, row 6; `ORC-JJXT5PKAWV.05737a` |  |
| Al₄Ca |  | -93.5 kJ/mol (basis unstated) |  | model |  |  | [4] Anglezio 1994; _cites ref. 88Itk_ | Table II, p. 8, row 10; `ORC-QATZUPXM73.904686` |  |
| Al₄Ca |  | -93.5 kJ/mol (basis unstated) ± 1.25 | 953 | experimental |  |  | [4] Anglezio 1994; _cites ref. 82Not1_ | Table II, p. 8, row 5; `ORC-TSGCRXNQPF.382a6d` |  |
| C15-Al2Al |  | 14.653 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 25; `ORC-3QIK7OVINP.90029a` |  |
| C15-Al2Al |  | 15.391 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 23; `ORC-4AIGKIGSRZ.f2f361` |  |
| C15-Al2Al |  | 15.391 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 26; `ORC-56LEO63NHI.173bf6` |  |
| C15-Al2Al |  | 15.57 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 24; `ORC-ZKD74CCMXO.fb87dd` |  |
| C15-Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -41.732 kJ/mol-atom |  | model | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [1] Ozturk 2005; _cites Itkin 1988_ [doi](https://doi.org/10.1007/bf02883160) | Table IV, p. 5, row 15; `ORC-KZBC6CU7AU.9f5935` |  |
| C15-Al2Ca |  | -36.604 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 11; `ORC-BIBOWE6FPC.9d438f` |  |
| C15-Al2Ca |  | -36.272 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 13; `ORC-AJBLYDVVJ7.a01f20` |  |
| C15-Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -34.3 kJ/mol-atom ± 3.5 | 298.15 | experimental | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [1] Ozturk 2005; _cites Notin 1982_ [doi](https://doi.org/10.1016/0364-5916%2882%2990015-3) | Table IV, p. 5, row 21; `ORC-6WOBDFQDT6.aa92cb` |  |
| C15-Al2Ca |  | -34.018 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 14; `ORC-WAZ6UJADGF.8da616` |  |
| C15-Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -33.4 kJ/mol-atom ± 0.6 | 298.15 | experimental | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [1] Ozturk 2005; _cites Notin 1995_ [doi](https://doi.org/10.1016/0925-8388%2894%2906001-0) | Table IV, p. 5, row 20; `ORC-7WTP4LTZGH.dc5f91` |  |
| C15-Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -32.185 kJ/mol-atom |  | model | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table IV, p. 5, row 16; `ORC-DJCUAWX7H7.cca9eb` |  |
| C15-Al2Ca |  | -32.136 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 12; `ORC-RRTXNAEBFG.4b59a8` |  |
| C15-Al2Ca |  | -32.048 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 18; `ORC-HH5P332BD5.027576` |  |
| C15-Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -31.3 kJ/mol-atom ± 0.5 | 298.15 | experimental | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [1] Ozturk 2005; _cites Veleckis 1981_ [doi](https://doi.org/10.1016/0022-5088%2881%2990098-9) | Table IV, p. 5, row 22; `ORC-FHBP4YQMQO.3fd5f4` |  |
| C15-Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -29.7 kJ/mol-atom |  | model | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [1] Ozturk 2005; _cites Kevorkov 2001_ | Table IV, p. 5, row 17; `ORC-GBNRGRM26L.98ea11` |  |
| C15-Al2Ca | [Al2Ca](https://data.orchid-project.org/compounds/Al2Ca.html) | -29.4 kJ/mol-atom ± 0.9 | 298.15 | experimental | -32.104 (mp-aaaaadom) | -32.307 (oqmd-5774) | [1] Ozturk 2005; _cites Kevorkov 2001_ | Table IV, p. 5, row 19; `ORC-TCPC77DHKK.452f64` |  |
| C15-Ca2Al |  | 43.208 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 28; `ORC-SGGMA66RLQ.98325d` |  |
| C15-Ca2Al |  | 43.38 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 29; `ORC-H3W2VXUOCC.dc7e94` |  |
| C15-Ca2Al |  | 46.508 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 30; `ORC-CUGQ3IS253.0c760d` |  |
| C15-Ca2Al |  | 46.508 kJ/mol-atom | 0 | DFT |  |  | [1] Ozturk 2005 | Table IV, p. 5, row 27; `ORC-LDRKSJQLLM.0b304d` |  |

## Other properties

### Phase transition (23)

Table: Phase transition, Al–Ca system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 847.6 K | 847.6 | congruent melting: Liquid = Al3Ca8; _Liquid: Ca 0.7272; Al3Ca8: Ca 0.727273_ | model | [1] Ozturk 2005 | Table V, p. 7, row 33; `ORC-6TKRNWMXJB` |  |
| Phase transition | 849.5 K | 849.5 | congruent melting: Liquid = Al3Ca8; _Liquid: Ca 0.7272; Al3Ca8: Ca 0.727273_ | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 31; `ORC-ASOAR7TL2X` |  |
| Phase transition | 852 K | 852 | congruent melting: L -> Al3Ca8; _L: Ca 0.7272; Al3Ca8: Ca 0.727273_ | unspecified | [2] ISLAM 2005; _cites ref. 28_ | Table IV, p. 8, row 39; `ORC-5S4QGUL2ML` |  |
| Phase transition | 852 K | 852 | congruent melting: L -> Al3Ca8; _L: Ca 0.727273; Al3Ca8: Ca 0.727273_ | unspecified | [2] ISLAM 2005; _cites ref. 24_ | Table IV, p. 8, row 37; `ORC-GT6F4JFLVX` |  |
| Phase transition | 852 K | 852 | congruent melting: Liquid = Al3Ca8; _Liquid: Ca 0.727; Al3Ca8: Ca 0.727273_ | experimental | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0172) | Table V, p. 7, row 29; `ORC-7E63JBHKZE` |  |
| Phase transition | 852 K | 852 | congruent melting: Liquid = Al3Ca8; _Liquid: Ca 0.7272; Al3Ca8: Ca 0.727273_ | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 30; `ORC-AFWNXRQUAA` |  |
| Phase transition | 852.43 K | 852.43 | congruent melting: L -> Al3Ca8; _L: Ca 0.7272; Al3Ca8: Ca 0.727273_ | model | [2] ISLAM 2005 | Table IV, p. 8, row 40; `ORC-VDLDQKVIX4` |  |
| Phase transition | 853.4 K | 853.4 | congruent melting: L -> Al3Ca8; _L: Ca 0.727; Al3Ca8: Ca 0.727273_ | unspecified | [2] ISLAM 2005; _cites ref. 26_ | Table IV, p. 8, row 38; `ORC-3542E47NAV` |  |
| Phase transition | 853.4 K | 853.4 | congruent melting: Liquid = Al3Ca8; _Liquid: Ca 0.7272; Al3Ca8: Ca 0.727273_ | model | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0173) | Table V, p. 7, row 32; `ORC-H3VNXH42WK` |  |
| Phase transition | 933 K | 933 | congruent melting: L -> Al-bcc; _L: Ca 0_ | unspecified | [2] ISLAM 2005; _cites ref. 26_ | Table IV, p. 8, row 1; `ORC-HWKSB4FM6M` |  |
| Phase transition | 933.33 K | 933.33 | congruent melting: L -> Al-bcc; _L: Ca 0_ | unspecified | [2] ISLAM 2005; _cites ref. 28_ | Table IV, p. 8, row 2; `ORC-FM4XIMWRMC` |  |
| Phase transition | 933.45 K | 933.45 | congruent melting: L -> Al-bcc; _L: Ca 0_ | model | [2] ISLAM 2005 | Table IV, p. 8, row 3; `ORC-KZRJ6326E7` |  |
| Phase transition | 1346.4 K | 1346.4 | congruent melting: Liquid = C15; _Liquid: Ca 0.3333; C15: Ca 0.333333_ | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 26; `ORC-USOLPN7X6F` |  |
| Phase transition | 1349.8 K | 1349.8 | congruent melting: Liquid = C15; _Liquid: Ca 0.3333; C15: Ca 0.333333_ | model | [1] Ozturk 2005 | Table V, p. 7, row 28; `ORC-RRP6KM2UPO` |  |
| Phase transition | 1352 K | 1352 | congruent melting: L -> Al2Ca; _L: Ca 0.333; Al2Ca: Ca 0.333333_ | unspecified | [2] ISLAM 2005; _cites ref. 24_ | Table IV, p. 8, row 32; `ORC-QG7AOBITQW` |  |
| Phase transition | 1352 K | 1352 | congruent melting: Liquid = C15; _Liquid: Ca 0.333; C15: Ca 0.333333_ | experimental | [1] Ozturk 2005; _cites Matsuyama 1928_ | Table V, p. 7, row 23; `ORC-CWYEJXTU2T` |  |
| Phase transition | 1354 K | 1354 | congruent melting: L -> Al2Ca; _L: Ca 0.3333; Al2Ca: Ca 0.333333_ | unspecified | [2] ISLAM 2005; _cites ref. 28_ | Table IV, p. 8, row 35; `ORC-HL3WFORAQJ` |  |
| Phase transition | 1354 K | 1354 | congruent melting: Liquid = C15; _Liquid: Ca 0.3333; C15: Ca 0.333333_ | model | [1] Ozturk 2005; _cites Ozturk 2002_ [doi](https://doi.org/10.1016/s0925-8388%2801%2901713-3) | Table V, p. 7, row 25; `ORC-SQS7DDXKJX` |  |
| Phase transition | 1359 K | 1359 | congruent melting: L -> Al2Ca; _L: Ca 0.333333; Al2Ca: Ca 0.333333_ | unspecified | [2] ISLAM 2005; _cites ref. 25_ | Table IV, p. 8, row 33; `ORC-JVN6THT2NB` |  |
| Phase transition | 1359 K | 1359 | congruent melting: Liquid = C15; _Liquid: Ca 0.333; C15: Ca 0.333333_ | experimental | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0172) | Table V, p. 7, row 24; `ORC-5ZYU3T4E3G` |  |
| Phase transition | 1359.1 K | 1359.1 | congruent melting: L -> Al2Ca; _L: Ca 0.3333; Al2Ca: Ca 0.333333_ | model | [2] ISLAM 2005 | Table IV, p. 8, row 36; `ORC-LYOL3RCBTW` |  |
| Phase transition | 1359.6 K | 1359.6 | congruent melting: L -> Al2Ca; _L: Ca 0.333; Al2Ca: Ca 0.333333_ | unspecified | [2] ISLAM 2005; _cites ref. 26_ | Table IV, p. 8, row 34; `ORC-X7BVCEN7GG` |  |
| Phase transition | 1359.6 K | 1359.6 | congruent melting: Liquid = C15; _Liquid: Ca 0.3333; C15: Ca 0.333333_ | model | [1] Ozturk 2005; _cites Kevorkov 2001_ [doi](https://doi.org/10.1515/ijmr-2001-0173) | Table V, p. 7, row 27; `ORC-ACIXXNYS2U` |  |

### Formation (31)

Table: Formation, Al–Ca system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Entropy of formation; _printed: ΔSf_ | -22.95 J/mol (basis unstated)/K |  | Al₄Ca | model | [4] Anglezio 1994; _cites ref. 88Itk_ | Table II, p. 8, row 10; `ORC-QATZUPXM73.5ce1bb` |  |
| Entropy of formation; _printed: ΔfS_ | -5.63 J/mol-atom/K | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | model | [2] ISLAM 2005 | Table V, p. 9, row 16; `ORC-V5VZIMYFHZ.93093d` |  |
| Entropy of formation; _printed: ΔfS_ | -5.38 J/mol-atom/K | 298.15 | Al2Ca; _alloy: Ca 0.333333_ | model | [2] ISLAM 2005 | Table V, p. 9, row 6; `ORC-SNUCDIATXV.393dfc` |  |
| Entropy of formation; _printed: ΔfS_ | -2.3 J/mol-atom/K | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | model | [2] ISLAM 2005 | Table V, p. 9, row 14; `ORC-3VEUOFIRK3.9cfe81` |  |
| Entropy of formation; _printed: ΔfS_ | -2.24 J/mol-atom/K | 298.15 | Al4Ca; _alloy: Ca 0.2_ | model | [2] ISLAM 2005 | Table V, p. 9, row 11; `ORC-NEVTWCUSSA.d23112` |  |
| Entropy of formation; _printed: ΔSf_ | -21.45 J/mol (basis unstated)/K ± 3.9 | 298.15 | Al₄Ca | experimental | [4] Anglezio 1994; _cites ref. 81Vel_ | Table II, p. 8, row 9; `ORC-5XLNAMXD2F.01a6fa` |  |
| Entropy of formation; _printed: ΔfS_ | -5.67 J/mol-atom/K ± 0.93 | 788 | Al2Ca; _alloy: Ca 0.333333_ | experimental | [2] ISLAM 2005; _cites ref. 34_ | Table V, p. 9, row 1; `ORC-4VF2YU5IU5.8d55f3` |  |
| Entropy of formation; _printed: ΔfS_ | -4.29 J/mol-atom/K ± 0.78 | 788 | Al4Ca; _alloy: Ca 0.2_ | experimental | [2] ISLAM 2005; _cites ref. 34_ | Table V, p. 9, row 7; `ORC-V6C7CC5AWB.7a2efc` |  |
| Entropy of formation; _printed: ΔfS_ | -2.15 J/mol-atom/K | 800 | Al14Ca13; _alloy: Ca 0.481481_ | model | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 15; `ORC-7RIDVI66SQ.931e1e` |  |
| Entropy of formation; _printed: ΔfS_ | -6.1 J/mol-atom/K ± 1.1 | 800 | Al2Ca; _alloy: Ca 0.333333_ | experimental | [2] ISLAM 2005; _cites ref. 35_ | Table V, p. 9, row 3; `ORC-EVWHCHSGOM.38c47c` |  |
| Entropy of formation; _printed: ΔfS_ | -5.02 J/mol-atom/K | 800 | Al2Ca; _alloy: Ca 0.333333_ | model | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 5; `ORC-UW6X4DZ2U2.59a10c` |  |
| Entropy of formation; _printed: ΔfS_ | -0.47 J/mol-atom/K | 800 | Al3Ca8; _alloy: Ca 0.727273_ | model | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 13; `ORC-Z2ONGEH2AN.7e02da` |  |
| Entropy of formation; _printed: ΔfS_ | -5.49 J/mol-atom/K | 800 | Al4Ca; _alloy: Ca 0.2_ | model | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 10; `ORC-PM3XOMMOPJ.660d83` |  |
| Entropy of formation; _printed: ΔfS_ | -1.1 J/mol-atom/K ± 0.5 | 800 | Al4Ca; _alloy: Ca 0.2_ | experimental | [2] ISLAM 2005; _cites ref. 35_ | Table V, p. 9, row 9; `ORC-XCFMJUUOJ7.6424d8` |  |
| Entropy of formation; _printed: ΔfS_ | -2.15 J/mol-atom/K | 800 | AlCa; _alloy: Ca 0.481481_ | model | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 15; `ORC-7RIDVI66SQ.691b75` |  |
| Entropy of formation; _printed: ΔSf_ | -5.5 J/mol (basis unstated)/K ± 2.5 | 800 | Al₄Ca | experimental | [4] Anglezio 1994; _cites ref. 82Not2_ | Table II, p. 8, row 6; `ORC-JJXT5PKAWV.4f9b80` |  |
| Entropy of formation; _printed: ΔSf_ | -23.85 J/mol (basis unstated)/K | 800 | Al₄Ca | model | [4] Anglezio 1994 | Table II, p. 8, row 8; `ORC-VFOS3PDKWJ.66514f` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -24.38 kJ/mol-atom | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | model | [2] ISLAM 2005 | Table V, p. 9, row 16; `ORC-V5VZIMYFHZ.805243` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -27.7 kJ/mol-atom | 298.15 | Al2Ca; _alloy: Ca 0.333333_ | model | [2] ISLAM 2005 | Table V, p. 9, row 6; `ORC-SNUCDIATXV.f49167` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -14.94 kJ/mol-atom | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | model | [2] ISLAM 2005 | Table V, p. 9, row 14; `ORC-3VEUOFIRK3.7d7ae4` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -16.6 kJ/mol-atom | 298.15 | Al4Ca; _alloy: Ca 0.2_ | model | [2] ISLAM 2005 | Table V, p. 9, row 11; `ORC-NEVTWCUSSA.f9c2a1` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -21.1 kJ/mol-atom | 800 | Al14Ca13; _alloy: Ca 0.481481_ | model | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 15; `ORC-7RIDVI66SQ.77d7df` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -28.3 kJ/mol-atom ± 0.3 | 800 | Al2Ca; _alloy: Ca 0.333333_ | experimental | [2] ISLAM 2005; _cites ref. 35_ | Table V, p. 9, row 3; `ORC-EVWHCHSGOM.4cae7b` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -25.7 kJ/mol-atom | 800 | Al2Ca; _alloy: Ca 0.333333_ | model | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 5; `ORC-UW6X4DZ2U2.86034d` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -13.6 kJ/mol-atom | 800 | Al3Ca8; _alloy: Ca 0.727273_ | model | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 13; `ORC-Z2ONGEH2AN.48996e` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -16.6 kJ/mol-atom | 800 | Al4Ca; _alloy: Ca 0.2_ | model | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 10; `ORC-PM3XOMMOPJ.3a1096` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -17.8 kJ/mol-atom ± 0.14 | 800 | Al4Ca; _alloy: Ca 0.2_ | experimental | [2] ISLAM 2005; _cites ref. 35_ | Table V, p. 9, row 9; `ORC-XCFMJUUOJ7.a0179c` |  |
| Gibbs energy of formation; _printed: ΔfG_ | -21.1 kJ/mol-atom | 800 | AlCa; _alloy: Ca 0.481481_ | model | [2] ISLAM 2005; _cites ref. 26_ | Table V, p. 9, row 15; `ORC-7RIDVI66SQ.8646cd` |  |
| Gibbs energy of formation; _printed: ΔGf_ | -0.089 kJ/mol (basis unstated) ± 7.000e-4 | 800 | Al₄Ca | experimental | [4] Anglezio 1994; _cites ref. 82Not2_ | Table II, p. 8, row 6; `ORC-JJXT5PKAWV.028d3b` |  |
| Gibbs energy of formation; _printed: ΔGf_ | -81.43 kJ/mol (basis unstated) | 800 | Al₄Ca | model | [4] Anglezio 1994 | Table II, p. 8, row 8; `ORC-VFOS3PDKWJ.8e1642` |  |
| Gibbs energy of formation; _printed: ΔGf_ | -89 kJ/mol (basis unstated) | 823 | Al₄Ca | experimental | [4] Anglezio 1994; _cites ref. 77Pre_ | Table II, p. 8, row 3; `ORC-V53CSJSTJG.9b1d99` |  |

### Crystal structure (78)

Table: Crystal structure, Al–Ca system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 4.346 Å | 0 | Al4Ca; _alloy: Ca 0.2_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 3; `ORC-EQJV2JSMB4.500bdb` |  |
| Lattice a | 4.245 Å | 0 | Al4Ca; _alloy: Ca 0.2_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 1; `ORC-PES6DZI5CN.bf0da5` |  |
| Lattice a | 4.258 Å | 0 | Al4Ca; _alloy: Ca 0.2_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 2; `ORC-WOCBBEQOEI.f4ad15` |  |
| Lattice a | 7.484 Å | 0 | C15-Al2Al; _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 12; `ORC-7AUJT4WFQL` |  |
| Lattice a | 7.479 Å | 0 | C15-Al2Al; _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 10; `ORC-QHNWPG7NM4` |  |
| Lattice a | 7.358 Å | 0 | C15-Al2Al; _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 11; `ORC-T65BU2VSNC` |  |
| Lattice a | 8.004 Å | 0 | C15-Al2Ca; _alloy: Ca 0.333333_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 8; `ORC-IPW2TUS6Z4` |  |
| Lattice a | 8.014 Å | 0 | C15-Al2Ca; _alloy: Ca 0.333333_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 6; `ORC-MDYMG3QTSN` |  |
| Lattice a | 7.846 Å | 0 | C15-Al2Ca; _alloy: Ca 0.333333_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 5; `ORC-OY7FTRV7JJ` |  |
| Lattice a | 7.856 Å | 0 | C15-Al2Ca; _alloy: Ca 0.333333_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 7; `ORC-X3BYPK46DX` |  |
| Lattice a | 8.892 Å | 0 | C15-Ca2Al; _alloy: Ca 0.666667_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 14; `ORC-5KV2GJVS7B` |  |
| Lattice a | 9.278 Å | 0 | C15-Ca2Al; _alloy: Ca 0.666667_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 13; `ORC-OLPMF5ZDH4` |  |
| Lattice a | 9.209 Å | 0 | C15-Ca2Al; _alloy: Ca 0.666667_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 15; `ORC-V55OYS6FGK` |  |
| Lattice a | 3.216 Å |  | bcc (A2); _alloy: Ca 0_ | model | [1] Ozturk 2005; _cites Boettger 1996_ [doi](https://doi.org/10.1103/physrevb.53.3007) | Table I, p. 3, row 11; `ORC-3KR4UP6QPF` |  |
| Lattice a | 3.239 Å | 0 | bcc (A2); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 10; `ORC-74UW2KBODK` |  |
| Lattice a | 3.186 Å | 0 | bcc (A2); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 7; `ORC-CXS4VUX33Y` |  |
| Lattice a | 3.233 Å | 0 | bcc (A2); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 8; `ORC-LOYJ6ABXFI` |  |
| Lattice a | 3.183 Å | 0 | bcc (A2); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 9; `ORC-SJZHW3NEFL` |  |
| Lattice a | 3.969 Å | 0 | fcc (A1); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 3; `ORC-BPFOTKV6RX` |  |
| Lattice a | 4.0495 Å |  | fcc (A1); _alloy: Ca 0_ | experimental | [1] Ozturk 2005; _cites Witt 1967_ [doi](https://doi.org/10.1515/zna-1967-0115) | Table I, p. 3, row 6; `ORC-FZUQMF3J33` |  |
| Lattice a | 4.04 Å | 0 | fcc (A1); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 4; `ORC-KHWZMW7M5Y` |  |
| Lattice a | 4.039 Å | 0 | fcc (A1); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 2; `ORC-ROADYVKMWH` |  |
| Lattice a | 4.02 Å |  | fcc (A1); _alloy: Ca 0_ | model | [1] Ozturk 2005; _cites Boettger 1996_ [doi](https://doi.org/10.1103/physrevb.53.3007) | Table I, p. 3, row 5; `ORC-RZVSDJ7RTQ` |  |
| Lattice a | 3.981 Å | 0 | fcc (A1); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 1; `ORC-YI6SA5C6C2` |  |
| Lattice a | 2.808 Å | 0 | hcp (A3); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 14; `ORC-4S4MPBBAHI.2a7825` |  |
| Lattice a | 2.852 Å | 0 | hcp (A3); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 15; `ORC-S4SZBJZPBH.2d23c4` |  |
| Lattice a | 2.845 Å |  | hcp (A3); _alloy: Ca 0_ | model | [1] Ozturk 2005; _cites Boettger 1996_ [doi](https://doi.org/10.1103/physrevb.53.3007) | Table I, p. 3, row 16; `ORC-SF455GJFKS.2a63bb` |  |
| Lattice a | 2.856 Å | 0 | hcp (A3); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 13; `ORC-TJ5WWSL4LL.0b388f` |  |
| Lattice a | 2.817 Å | 0 | hcp (A3); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 12; `ORC-XYF6A3RPD5.b5d4ea` |  |
| Lattice a | 15.146 Å | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 19; `ORC-FBH56XEPTV.12bcc3` |  |
| Lattice a | 15.428 Å | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 20; `ORC-I5NQBK3E2P.87107e` |  |
| Lattice a | 15.551 Å | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 21; `ORC-OR6CQTNURI.50fc74` |  |
| Lattice a | 9.484 Å | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 24; `ORC-CENWT2HRSF.256f55` |  |
| Lattice a | 9.176 Å | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 22; `ORC-GHDVVNIFEK.a0e5b3` |  |
| Lattice a | 9.417 Å | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 23; `ORC-KLBORP5BER.2bcabd` |  |
| Lattice a | 4.36 Å | 298.15 | Al4Ca; _alloy: Ca 0.2_ | experimental | [1] Ozturk 2005; _cites Nowotny 2005_ | Table III, p. 4, row 4; `ORC-NVDMTS5AWD.eb49d6` |  |
| Lattice a | 8.02 Å | 298.15 | C15-Al2Ca; _alloy: Ca 0.333333_ | experimental | [1] Ozturk 2005; _cites Nowotny 1939_ | Table III, p. 4, row 9; `ORC-5FPRJTOJ3E` |  |
| Lattice b | 4.346 Å | 0 | Al4Ca; _alloy: Ca 0.2_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 3; `ORC-EQJV2JSMB4.f34475` |  |
| Lattice b | 4.245 Å | 0 | Al4Ca; _alloy: Ca 0.2_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 1; `ORC-PES6DZI5CN.9db7b6` |  |
| Lattice b | 4.258 Å | 0 | Al4Ca; _alloy: Ca 0.2_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 2; `ORC-WOCBBEQOEI.525f77` |  |
| Lattice b | 9.488 Å | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 19; `ORC-FBH56XEPTV.98e7b0` |  |
| Lattice b | 9.676 Å | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 20; `ORC-I5NQBK3E2P.057fcc` |  |
| Lattice b | 9.873 Å | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 21; `ORC-OR6CQTNURI.14793a` |  |
| Lattice b | 9.592 Å | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 24; `ORC-CENWT2HRSF.0e9246` |  |
| Lattice b | 9.228 Å | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 22; `ORC-GHDVVNIFEK.b0d4f8` |  |
| Lattice b | 9.485 Å | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 23; `ORC-KLBORP5BER.408bee` |  |
| Lattice b | 4.36 Å | 298.15 | Al4Ca; _alloy: Ca 0.2_ | experimental | [1] Ozturk 2005; _cites Nowotny 2005_ | Table III, p. 4, row 4; `ORC-NVDMTS5AWD.285092` |  |
| Lattice c | 11.2 Å | 0 | Al4Ca; _alloy: Ca 0.2_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 3; `ORC-EQJV2JSMB4.5cfea1` |  |
| Lattice c | 11.121 Å | 0 | Al4Ca; _alloy: Ca 0.2_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 1; `ORC-PES6DZI5CN.42e3f4` |  |
| Lattice c | 11.051 Å | 0 | Al4Ca; _alloy: Ca 0.2_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 2; `ORC-WOCBBEQOEI.338ca5` |  |
| Lattice c | 4.663 Å | 0 | hcp (A3); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 14; `ORC-4S4MPBBAHI.047500` |  |
| Lattice c | 4.752 Å | 0 | hcp (A3); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 15; `ORC-S4SZBJZPBH.57633c` |  |
| Lattice c | 4.646 Å |  | hcp (A3); _alloy: Ca 0_ | model | [1] Ozturk 2005; _cites Boettger 1996_ [doi](https://doi.org/10.1103/physrevb.53.3007) | Table I, p. 3, row 16; `ORC-SF455GJFKS.e5752a` |  |
| Lattice c | 4.712 Å | 0 | hcp (A3); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 13; `ORC-TJ5WWSL4LL.5682f4` |  |
| Lattice c | 4.647 Å | 0 | hcp (A3); _alloy: Ca 0_ | DFT | [1] Ozturk 2005 | Table I, p. 3, row 12; `ORC-XYF6A3RPD5.e3d9e5` |  |
| Lattice c | 9.572 Å | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 19; `ORC-FBH56XEPTV.fd4f58` |  |
| Lattice c | 9.776 Å | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 20; `ORC-I5NQBK3E2P.f47013` |  |
| Lattice c | 9.726 Å | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 21; `ORC-OR6CQTNURI.e8455f` |  |
| Lattice c | 9.671 Å | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 24; `ORC-CENWT2HRSF.bf6cb2` |  |
| Lattice c | 9.294 Å | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 22; `ORC-GHDVVNIFEK.1dbe3f` |  |
| Lattice c | 9.567 Å | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 23; `ORC-KLBORP5BER.bd166e` |  |
| Lattice c | 11.09 Å | 298.15 | Al4Ca; _alloy: Ca 0.2_ | experimental | [1] Ozturk 2005; _cites Nowotny 2005_ | Table III, p. 4, row 4; `ORC-NVDMTS5AWD.a235a2` |  |
| lattice alpha | 90 deg | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 19; `ORC-FBH56XEPTV.542836` |  |
| lattice alpha | 90 deg | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 21; `ORC-OR6CQTNURI.89f05f` |  |
| lattice alpha | 99.02 deg | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 24; `ORC-CENWT2HRSF.5a08ea` |  |
| lattice alpha | 98.87 deg | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 22; `ORC-GHDVVNIFEK.b5aac0` |  |
| lattice alpha | 98.94 deg | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 23; `ORC-KLBORP5BER.c09d5b` |  |
| lattice beta | 107.93 deg | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 19; `ORC-FBH56XEPTV.d4ff5e` |  |
| lattice beta | 108.01 deg | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 20; `ORC-I5NQBK3E2P.719e83` |  |
| lattice beta | 108.09 deg | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 21; `ORC-OR6CQTNURI.741663` |  |
| lattice beta | 101.13 deg | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 24; `ORC-CENWT2HRSF.fa7a9c` |  |
| lattice beta | 101.01 deg | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 22; `ORC-GHDVVNIFEK.4b7303` |  |
| lattice beta | 101.13 deg | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 23; `ORC-KLBORP5BER.0dfdd3` |  |
| lattice gamma | 90 deg | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 19; `ORC-FBH56XEPTV.59ccf5` |  |
| lattice gamma | 90 deg | 298.15 | Al14Ca13; _alloy: Ca 0.481481_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 21; `ORC-OR6CQTNURI.b0065f` |  |
| lattice gamma | 119.55 deg | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | experimental | [1] Ozturk 2005; _cites Huang 1998_ [doi](https://doi.org/10.1021/ic980656h) | Table III, p. 4, row 24; `ORC-CENWT2HRSF.92da75` |  |
| lattice gamma | 119.85 deg | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 22; `ORC-GHDVVNIFEK.f02075` |  |
| lattice gamma | 119.7 deg | 298.15 | Al3Ca8; _alloy: Ca 0.727273_ | DFT | [1] Ozturk 2005 | Table III, p. 4, row 23; `ORC-KLBORP5BER.7be4bf` |  |

## Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

1. Koray Ozturk, Yu Zhong, Long-Qing Chen, Zi-Kui Liu, Jorge O. Sofo, C. Wolverton, Linking first-principles energetics to CALPHAD: An application to thermodynamic modeling of the Al-Ca binary system, Metall Mater Trans A 36, 5-13 (2005). [doi:10.1007/s11661-005-0133-0](https://doi.org/10.1007/s11661-005-0133-0)
2. F. ISLAM, M. MEDRAJ, THERMODYNAMIC MODELLING OF THE Mg-Al-Ca SYSTEM, Canadian Metallurgical Quarterly 44, 523-536 (2005). [doi:10.1179/cmq.2005.44.4.523](https://doi.org/10.1179/cmq.2005.44.4.523)
3. Koray Ozturk, Long-Qing Chen, Zi-Kui Liu, Thermodynamic assessment of the Al–Ca binary system using random solution and associate models, Journal of Alloys and Compounds 340, 199-206 (2002). [doi:10.1016/s0925-8388(01)01713-3](https://doi.org/10.1016/s0925-8388%2801%2901713-3)
4. J.C. Anglezio, C. Servant, I. Ansara, Contribution to the experimental and thermodynamic assessment of the AlCaFeSi system—I. AlCaFe, AlCaSi, AlFeSi and CaFeSi systems, Calphad 18, 273-309 (1994). [doi:10.1016/0364-5916(94)90034-5](https://doi.org/10.1016/0364-5916%2894%2990034-5)

## 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-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735859
- R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735891
- 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_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@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=\<id>, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).