# Cu–La system

> Cu–La system: 40 accepted literature values (invariant reaction 19, crystal structure 12, phase transition 9) and 3 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/CU-LA.html · Markdown: https://data.orchid-project.org/systems/CU-LA.md

40 accepted literature values from 2 paper(s) (experimental 17, model 11, unspecified 12); 3 calculated phase diagram(s). 1 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/CU-LA.json) · [CSV](https://data.orchid-project.org/systems/CU-LA.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CU-LA) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#CU-LA/CuLa-12An.json) · [phases (13)](https://data.orchid-project.org/phases/pages/CU-LA.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CU-LA.html) · [Markdown](https://data.orchid-project.org/systems/CU-LA.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 17 |
| model | 11 |
| unspecified | 12 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 19 |
| phase transition | 9 |
| crystal structure | 12 |

## 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 |
|---|---|---|---|
| CuLa-12An.tdb | X. An, Q. Li, J. Zhang, S. Chen, Y. Yang, Calphad, 36, 8-15(2012). [doi:10.1016/j.calphad.2011.10.004](https://doi.org/10.1016/j.calphad.2011.10.004) | `96d6ecf2e7f37b9cc09db82eea90b8741b71cda1a14d610aedafc3e49e401597` | [viewer](https://orchid-project.org/phase-diagrams/#CU-LA/CuLa-12An.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CuLa-12An.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CuLa-12An.json) |
| CuLa-89Qi.tdb | G. Qi, K. Itagaki, S. an Mey, P.J. Spencer, Z. Metallkd., 80, 883-87(1989). [doi:10.1515/ijmr-1989-801206](https://doi.org/10.1515/ijmr-1989-801206) | `c0ed7e9c7856491b9c73ca5123122fc19baeab9defa710a7faa6b6c81b1e2872` | [viewer](https://orchid-project.org/phase-diagrams/#CU-LA/CuLa-89Qi.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CuLa-89Qi.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CuLa-89Qi.json) |
| CuLa-99Du.tdb | Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999). [doi:10.1016/S0925-8388(99)00080-8](https://doi.org/10.1016/S0925-8388%2899%2900080-8) | `41bc14252d38c854d5a1a6fe90ff3cd233ec907ef8f0a6a0d8cefb0cafed65cf` | [viewer](https://orchid-project.org/phase-diagrams/#CU-LA/CuLa-99Du.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CuLa-99Du.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CuLa-99Du.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| CuLa-12An.tdb | 1146.62 | FCC_A1 (x(La) 0) + CU37LA3_D23 (x(La) 0.075) + LIQUID (x(La) 0.08731) |
| CuLa-12An.tdb | 1146.62 | FCC_A1 (x(La) 0) + CU37LA3_D23 (x(La) 0.075) + LIQUID (x(La) 0.08718) |
| CuLa-12An.tdb | 1136.15 | CU37LA3_D23 (x(La) 0.075) + LIQUID (x(La) 0.09559) + CU6LA_B (x(La) 0.14286) |
| CuLa-12An.tdb | 1136.15 | CU37LA3_D23 (x(La) 0.075) + LIQUID (x(La) 0.0955) + CU6LA_B (x(La) 0.14286) |
| CuLa-12An.tdb | 1136.15 | CU37LA3_D23 (x(La) 0.075) + LIQUID (x(La) 0.09547) + CU6LA_B (x(La) 0.14286) |
| CuLa-12An.tdb | 1134 | LIQUID (x(La) 0.96733) + FCC_A1 (x(La) 1) + BCC_A2 (x(La) 1) |
| CuLa-12An.tdb | 1099.9 | FCC_A1 (x(La) 0) + CU37LA3_D23 (x(La) 0.075) + CU6LA_B (x(La) 0.14286) |
| CuLa-12An.tdb | 1062.64 | CU6LA_B (x(La) 0.14286) + CU5LA_D2D (x(La) 0.16667) + LIQUID (x(La) 0.22238) |
| CuLa-12An.tdb | 1062.63 | CU6LA_B (x(La) 0.14286) + CU5LA_D2D (x(La) 0.16667) + LIQUID (x(La) 0.2225) |
| CuLa-12An.tdb | 1014.78 | CU5LA_D2D (x(La) 0.16667) + CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24185) |
| CuLa-12An.tdb | 1014.78 | CU5LA_D2D (x(La) 0.16667) + CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24176) |
| CuLa-12An.tdb | 1014.78 | CU5LA_D2D (x(La) 0.16667) + CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24193) |
| CuLa-12An.tdb | 1011.23 | CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24458) + CU2LA_C32 (x(La) 0.33333) |
| CuLa-12An.tdb | 1011.23 | CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24451) + CU2LA_C32 (x(La) 0.33333) |
| CuLa-12An.tdb | 1011.23 | CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24466) + CU2LA_C32 (x(La) 0.33333) |
| CuLa-12An.tdb | 798.58 | CU2LA_C32 (x(La) 0.33333) + CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.59093) |
| CuLa-12An.tdb | 798.58 | CU2LA_C32 (x(La) 0.33333) + CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.59064) |
| CuLa-12An.tdb | 747.99 | CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.71222) + FCC_A1 (x(La) 1) |
| CuLa-12An.tdb | 747.98 | CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.71203) + FCC_A1 (x(La) 1) |
| CuLa-12An.tdb | 550 | CULA_B27 (x(La) 0.5) + DHCP (x(La) 1) + FCC_A1 (x(La) 1) |
| CuLa-12An.tdb | 500 | CU6LA_B (x(La) 0.14286) + CU6LA_A (x(La) 0.14286) + CU5LA_D2D (x(La) 0.16667) |
| CuLa-12An.tdb | 500 | FCC_A1 (x(La) 0) + CU6LA_A (x(La) 0.14286) + CU6LA_B (x(La) 0.14286) |
| CuLa-89Qi.tdb | 1134 | LIQUID (x(La) 0.96639) + FCC_A1 (x(La) 1) + BCC_A2 (x(La) 1) |
| CuLa-89Qi.tdb | 1118.06 | FCC_A1 (x(La) 0) + LIQUID (x(La) 0.09153) + CU6LA (x(La) 0.14286) |
| CuLa-89Qi.tdb | 1118.06 | FCC_A1 (x(La) 0) + LIQUID (x(La) 0.09149) + CU6LA (x(La) 0.14286) |
| CuLa-89Qi.tdb | 1118.06 | FCC_A1 (x(La) 0) + LIQUID (x(La) 0.09137) + CU6LA (x(La) 0.14286) |
| CuLa-89Qi.tdb | 1068 | CU6LA (x(La) 0.14286) + CU5LA_D2D (x(La) 0.16667) + LIQUID (x(La) 0.22481) |
| CuLa-89Qi.tdb | 1068 | CU6LA (x(La) 0.14286) + CU5LA_D2D (x(La) 0.16667) + LIQUID (x(La) 0.22472) |
| CuLa-89Qi.tdb | 1027.33 | CU5LA_D2D (x(La) 0.16667) + LIQUID (x(La) 0.24653) + CU2LA_C32 (x(La) 0.33333) |
| CuLa-89Qi.tdb | 1027.33 | CU5LA_D2D (x(La) 0.16667) + LIQUID (x(La) 0.24644) + CU2LA_C32 (x(La) 0.33333) |
| CuLa-89Qi.tdb | 1027.33 | CU5LA_D2D (x(La) 0.16667) + LIQUID (x(La) 0.24659) + CU2LA_C32 (x(La) 0.33333) |
| CuLa-89Qi.tdb | 802.21 | CU2LA_C32 (x(La) 0.33333) + CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.62957) |
| CuLa-89Qi.tdb | 802.21 | CU2LA_C32 (x(La) 0.33333) + CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.62917) |
| CuLa-89Qi.tdb | 756.28 | CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.72215) + FCC_A1 (x(La) 1) |
| CuLa-89Qi.tdb | 756.28 | CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.7224) + FCC_A1 (x(La) 1) |
| CuLa-89Qi.tdb | 550 | CULA_B27 (x(La) 0.5) + DHCP (x(La) 1) + FCC_A1 (x(La) 1) |
| CuLa-99Du.tdb | 1146.62 | FCC_A1 (x(La) 0) + CU37LA3_D23 (x(La) 0.075) + LIQUID (x(La) 0.08731) |
| CuLa-99Du.tdb | 1146.62 | FCC_A1 (x(La) 0) + CU37LA3_D23 (x(La) 0.075) + LIQUID (x(La) 0.08714) |
| CuLa-99Du.tdb | 1134.84 | CU37LA3_D23 (x(La) 0.075) + LIQUID (x(La) 0.09638) + CU6LA_B (x(La) 0.14286) |
| CuLa-99Du.tdb | 1134.84 | CU37LA3_D23 (x(La) 0.075) + LIQUID (x(La) 0.09632) + CU6LA_B (x(La) 0.14286) |
| CuLa-99Du.tdb | 1134 | LIQUID (x(La) 0.96733) + FCC_A1 (x(La) 1) + BCC_A2 (x(La) 1) |
| CuLa-99Du.tdb | 1092.77 | FCC_A1 (x(La) 0) + CU37LA3_D23 (x(La) 0.075) + CU6LA_B (x(La) 0.14286) |
| CuLa-99Du.tdb | 1072.48 | CU6LA_B (x(La) 0.14286) + CU5LA_D2D (x(La) 0.16667) + LIQUID (x(La) 0.21734) |
| CuLa-99Du.tdb | 1072.48 | CU6LA_B (x(La) 0.14286) + CU5LA_D2D (x(La) 0.16667) + LIQUID (x(La) 0.21747) |
| CuLa-99Du.tdb | 1014.78 | CU5LA_D2D (x(La) 0.16667) + CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24185) |
| CuLa-99Du.tdb | 1014.78 | CU5LA_D2D (x(La) 0.16667) + CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24176) |
| CuLa-99Du.tdb | 1014.78 | CU5LA_D2D (x(La) 0.16667) + CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24193) |
| CuLa-99Du.tdb | 1011.23 | CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24458) + CU2LA_C32 (x(La) 0.33333) |
| CuLa-99Du.tdb | 1011.23 | CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24451) + CU2LA_C32 (x(La) 0.33333) |
| CuLa-99Du.tdb | 1011.23 | CU4LA (x(La) 0.2) + LIQUID (x(La) 0.24466) + CU2LA_C32 (x(La) 0.33333) |
| CuLa-99Du.tdb | 798.58 | CU2LA_C32 (x(La) 0.33333) + CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.59093) |
| CuLa-99Du.tdb | 798.58 | CU2LA_C32 (x(La) 0.33333) + CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.59064) |
| CuLa-99Du.tdb | 747.99 | CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.71222) + FCC_A1 (x(La) 1) |
| CuLa-99Du.tdb | 747.98 | CULA_B27 (x(La) 0.5) + LIQUID (x(La) 0.71203) + FCC_A1 (x(La) 1) |
| CuLa-99Du.tdb | 550 | CULA_B27 (x(La) 0.5) + DHCP (x(La) 1) + FCC_A1 (x(La) 1) |
| CuLa-99Du.tdb | 500.05 | CU6LA_B (x(La) 0.14286) + CU6LA_A (x(La) 0.14286) + CU5LA_D2D (x(La) 0.16667) |
| CuLa-99Du.tdb | 500.05 | FCC_A1 (x(La) 0) + CU6LA_A (x(La) 0.14286) + CU6LA_B (x(La) 0.14286) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/CU/CU-LA.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/CU/CU-LA.json) · [CALPHAD hull CuLa-89Qi](https://data.orchid-project.org/hulls/calphad-sgte/CU/CU-LA--CuLa-89Qi.json) · [CALPHAD hull CuLa-99Du](https://data.orchid-project.org/hulls/calphad-sgte/CU/CU-LA--CuLa-99Du.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Cu–La system (19)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1147 | liq.+f.c.c.(Cu)->Cu37La3 | L: La 0.0873; Cu37La3: La 0.075 | model | [1] Du 1999 | Table 2, p. 4, row 1; `ORC-B64FX5USEF` |  |
| 1146 | liq.+f.c.c.(Cu)->Cu37La3 | L: La 0.088; Cu37La3: La 0.075 | experimental | [1] Du 1999; _cites Meyer-Liautaud 1985_ [doi](https://doi.org/10.1016/0022-5088%2885%2990308-x) | Table 2, p. 4, row 2; `ORC-ZTHOHZL5YS` |  |
| 1138 | eutectic: liq.->Cu6La+f.c.c.(Cu) | L: La 0.009; Cu6La: La 0.142857 | experimental | [1] Du 1999; _cites Cirafici 1977_ [doi](https://doi.org/10.1016/0022-5088%2877%2990104-7) | Table 2, p. 4, row 5; `ORC-4Y5W7XI6DU` |  |
| 1137 | eutectic: liq.->Cu6La+f.c.c.(Cu) | L: La 0.009; Cu6La: La 0.142857 | experimental | [1] Du 1999; _cites Meyer-Liautaud 1985_ [doi](https://doi.org/10.1016/0022-5088%2885%2990308-x) | Table 2, p. 4, row 4; `ORC-WB3HMYGUFX` |  |
| 1135 | eutectic: liq.->Cu37La3+βCu6La | L: La 0.0963; Cu37La3: La 0.075; βCu6La: La 0.142857 | model | [1] Du 1999 | Table 2, p. 4, row 3; `ORC-FQTVUVC5IZ` |  |
| 1093 | Cu37La3->f.c.c.(Cu)+βCu6La | Cu37La3: La 0.075; βCu6La: La 0.142857 | experimental | [1] Du 1999; _cites Meyer-Liautaud 1985_ [doi](https://doi.org/10.1016/0022-5088%2885%2990308-x) | Table 2, p. 4, row 7; `ORC-DMUJXCANBC` |  |
| 1093 | Cu37La3->f.c.c.(Cu)+βCu6La | Cu37La3: La 0.075; βCu6La: La 0.142857 | model | [1] Du 1999 | Table 2, p. 4, row 6; `ORC-MJLEJWTDM3` |  |
| 1078 | liq.+Cu6La->Cu5La | L: La 0.218; Cu6La: La 0.142857; Cu5La: La 0.166667 | experimental | [1] Du 1999; _cites Cirafici 1977_ [doi](https://doi.org/10.1016/0022-5088%2877%2990104-7) | Table 2, p. 4, row 15; `ORC-UKHSEQQDLO` |  |
| 1073 | liq.+Cu6La->Cu5La | L: La 0.22; Cu6La: La 0.142857; Cu5La: La 0.166667 | experimental | [1] Du 1999; _cites Meyer-Liautaud 1985_ [doi](https://doi.org/10.1016/0022-5088%2885%2990308-x) | Table 2, p. 4, row 14; `ORC-B2DTOT4RAV` |  |
| 1073 | liq.+βCu6La->Cu5La | L: La 0.2175; βCu6La: La 0.142857; Cu5La: La 0.166667 | model | [1] Du 1999 | Table 2, p. 4, row 13; `ORC-G6OTAP4MY4` |  |
| 1018 | eutectic: liq.->Cu2La+Cu5La | L: La 0.245; Cu2La: La 0.333333; Cu5La: La 0.166667 | experimental | [1] Du 1999; _cites Cirafici 1977_ [doi](https://doi.org/10.1016/0022-5088%2877%2990104-7) | Table 2, p. 4, row 20; `ORC-3Q4JZHC3BG` |  |
| 1016 | liq.+Cu5La->Cu4La | L: La 0.251; Cu5La: La 0.166667; Cu4La: La 0.2 | experimental | [1] Du 1999; _cites Meyer-Liautaud 1985_ [doi](https://doi.org/10.1016/0022-5088%2885%2990308-x) | Table 2, p. 4, row 17; `ORC-2OHSMM6M3D` |  |
| 1015 | liq.+Cu5La->Cu4La | L: La 0.2418; Cu5La: La 0.166667; Cu4La: La 0.2 | model | [1] Du 1999 | Table 2, p. 4, row 16; `ORC-IB4GMMKTMQ` |  |
| 1011 | eutectic: liq.->Cu2La+Cu4La | L: La 0.2446; Cu2La: La 0.333333; Cu4La: La 0.2 | model | [1] Du 1999 | Table 2, p. 4, row 18; `ORC-5DWXLCYRIT` |  |
| 1008 | eutectic: liq.->Cu2La+Cu4La | L: La 0.255; Cu2La: La 0.333333; Cu4La: La 0.2 | experimental | [1] Du 1999; _cites Meyer-Liautaud 1985_ [doi](https://doi.org/10.1016/0022-5088%2885%2990308-x) | Table 2, p. 4, row 19; `ORC-7QPOR5YGDL` |  |
| 798 | liq.+Cu2La->CuLa | L: La 0.5909; Cu2La: La 0.333333; CuLa: La 0.5 | model | [1] Du 1999 | Table 2, p. 4, row 23; `ORC-5JC6ALTQ7J` |  |
| 798 | liq.+Cu2La->CuLa | L: La 0.6; Cu2La: La 0.333333; CuLa: La 0.5 | experimental | [1] Du 1999; _cites Cirafici 1977_ [doi](https://doi.org/10.1016/0022-5088%2877%2990104-7) | Table 2, p. 4, row 24; `ORC-LV5B26WHBP` |  |
| 748 | eutectic: liq.->CuLa+f.c.c.(La) | L: La 0.712; CuLa: La 0.5 | model | [1] Du 1999 | Table 2, p. 4, row 25; `ORC-BXQMNPA3Z4` |  |
| 748 | eutectic: liq.->CuLa+f.c.c.(La) | L: La 0.71; CuLa: La 0.5 | experimental | [1] Du 1999; _cites Cirafici 1977_ [doi](https://doi.org/10.1016/0022-5088%2877%2990104-7) | Table 2, p. 4, row 26; `ORC-CD3BGC4MOK` |  |

## Other properties

### Phase transition (9)

Table: Phase transition, Cu–La system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 500 K | 500 | αCu6La->βCu6La; _αCu6La: La 0.142857; βCu6La: La 0.142857_ | model | [1] Du 1999 | Table 2, p. 4, row 11; `ORC-AVKMYG6Y3F` |  |
| Phase transition | 500 K | 500 | αCu6La->βCu6La; _αCu6La: La 0.142857; βCu6La: La 0.142857_ | experimental | [1] Du 1999; _cites Yamada 1987_ [doi](https://doi.org/10.1143/jpsj.56.3553) | Table 2, p. 4, row 12; `ORC-R5BFMI2GFV` |  |
| Phase transition | 1102 K | 1102 | Cu2La | experimental | [1] Du 1999; _cites Qi 1989_ | p. 4; `ORC-LMQXVTLAQE.2b8018` | “Fig. 6a and b presents the enthalpies and entropies of fusion of two compounds Cu 2 La and Cu 6 La at their melting temperature 1102 and 1194 K with the experimental data \[11-14\], respectively.” |
| Phase transition | 1102 K | 1102 | liq.->Cu2La; _L: La 0.3333; Cu2La: La 0.333333_ | model | [1] Du 1999 | Table 2, p. 4, row 21; `ORC-UUDHCNMPIW` |  |
| Phase transition | 1103 K | 1103 | liq.->Cu2La; _L: La 0.3333; Cu2La: La 0.333333_ | experimental | [1] Du 1999; _cites Cirafici 1977_ [doi](https://doi.org/10.1016/0022-5088%2877%2990104-7) | Table 2, p. 4, row 22; `ORC-GZ2DDATDCA` |  |
| Phase transition | 1178 K | 1178 | liq.->Cu6La; _L: La 0.1429; Cu6La: La 0.142857_ | experimental | [1] Du 1999; _cites Cirafici 1977_ [doi](https://doi.org/10.1016/0022-5088%2877%2990104-7) | Table 2, p. 4, row 10; `ORC-5VTRAA6MUA` |  |
| Phase transition | 1193 K | 1193 | liq.->Cu6La; _L: La 0.1429; Cu6La: La 0.142857_ | experimental | [1] Du 1999; _cites Meyer-Liautaud 1985_ [doi](https://doi.org/10.1016/0022-5088%2885%2990308-x) | Table 2, p. 4, row 9; `ORC-C4FL427XF6` |  |
| Phase transition | 1194 K | 1194 | Cu6La | experimental | [1] Du 1999; _cites Qi 1989_ | p. 4; `ORC-LMQXVTLAQE.03169b` | “Fig. 6a and b presents the enthalpies and entropies of fusion of two compounds Cu 2 La and Cu 6 La at their melting temperature 1102 and 1194 K with the experimental data \[11-14\], respectively.” |
| Phase transition | 1194 K | 1194 | liq.->βCu6La; _L: La 0.1429; βCu6La: La 0.142857_ | model | [1] Du 1999 | Table 2, p. 4, row 8; `ORC-SEQYYPBNR2` |  |

### Crystal structure (12)

Table: Crystal structure, Cu–La system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 8.165 Å |  | β-LaCu6; _alloy: La 0.142857_ | unspecified | [2] An 2012 | Table 2, p. 5, row 23; `ORC-7XX53RIUOG.d3d98a` |  |
| Lattice a | 7.543 Å | 298.15 | LaCu; _alloy: La 0.5_ | unspecified | [2] An 2012 | Table 2, p. 5, row 16; `ORC-VOHOHJGSJP.6fbe6a` |  |
| Lattice a | 4.346 Å | 298.15 | LaCu2; _alloy: La 0.333333_ | unspecified | [2] An 2012 | Table 2, p. 5, row 17; `ORC-AIYU6PMPDY.78e267` |  |
| Lattice a | 5.189 Å | 298.15 | LaCu5; _alloy: La 0.166667_ | unspecified | [2] An 2012 | Table 2, p. 5, row 19; `ORC-DPILLA3VWW.df5fb0` |  |
| Lattice a | 5.143 Å | 298.15 | α-LaCu6; _alloy: La 0.142857_ | unspecified | [2] An 2012 | Table 2, p. 5, row 18; `ORC-V4FFAYWTEB.20b5a5` |  |
| Lattice a | 5.1467 Å | 298.15 | α-LaCu6; _alloy: La 0.142857_ | unspecified | [2] An 2012 | Table 2, p. 5, row 22; `ORC-Y7X6SAMFWQ.ed1b0d` |  |
| Lattice c | 10.23 Å |  | β-LaCu6; _alloy: La 0.142857_ | unspecified | [2] An 2012 | Table 2, p. 5, row 23; `ORC-7XX53RIUOG.248a76` |  |
| Lattice c | 5.724 Å | 298.15 | LaCu; _alloy: La 0.5_ | unspecified | [2] An 2012 | Table 2, p. 5, row 16; `ORC-VOHOHJGSJP.f6b154` |  |
| Lattice c | 3.807 Å | 298.15 | LaCu2; _alloy: La 0.333333_ | unspecified | [2] An 2012 | Table 2, p. 5, row 17; `ORC-AIYU6PMPDY.ef98f8` |  |
| Lattice c | 4.107 Å | 298.15 | LaCu5; _alloy: La 0.166667_ | unspecified | [2] An 2012 | Table 2, p. 5, row 19; `ORC-DPILLA3VWW.8c7038` |  |
| Lattice c | 8.144 Å | 298.15 | α-LaCu6; _alloy: La 0.142857_ | unspecified | [2] An 2012 | Table 2, p. 5, row 18; `ORC-V4FFAYWTEB.d3943a` |  |
| Lattice c | 8.146 Å | 298.15 | α-LaCu6; _alloy: La 0.142857_ | unspecified | [2] An 2012 | Table 2, p. 5, row 22; `ORC-Y7X6SAMFWQ.2c054e` |  |

## Sources

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

1. Zhenmin Du, Yunhua Xu, Weijing Zhang, Thermodynamic assessment of the Cu–La system, Journal of Alloys and Compounds 289, 88-95 (1999). [doi:10.1016/s0925-8388(99)00080-8](https://doi.org/10.1016/s0925-8388%2899%2900080-8)
2. Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012). [doi:10.1016/j.calphad.2011.10.004](https://doi.org/10.1016/j.calphad.2011.10.004)

## 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/).