# Cu–Y system

> Cu–Y system: 71 accepted literature values (invariant reaction 36, crystal structure 18, phase transition 17) and 1 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

71 accepted literature values from 2 paper(s) (experimental 51, model 20); 1 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/CU-Y.json) · [CSV](https://data.orchid-project.org/systems/CU-Y.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CU-Y) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#CU-Y/CuY-94Fri-LB.json) · [phases (10)](https://data.orchid-project.org/phases/pages/CU-Y.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CU-Y.html) · [Markdown](https://data.orchid-project.org/systems/CU-Y.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 51 |
| model | 20 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 36 |
| phase transition | 17 |
| crystal structure | 18 |

## 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 |
|---|---|---|---|
| CuY-94Fri-LB.tdb | S.G. Fries, H.L. Lukas, R. Konetzki, R. Schmid-Fetzer, J. Phase Equilib., 15, 606-14(1994). [doi:10.1007/BF02647621](https://doi.org/10.1007/BF02647621) | `a8f5ab09a715225a83a08eafa2554e1f0fd2c9cc35395a5f734448a7a5013007` | [viewer](https://orchid-project.org/phase-diagrams/#CU-Y/CuY-94Fri-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CuY-94Fri-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CuY-94Fri-LB.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| CuY-94Fri-LB.tdb | 1751.15 | LIQUID (x(Y) 0.97955) + HCP_A3 (x(Y) 1) + BCC_A2 (x(Y) 1) |
| CuY-94Fri-LB.tdb | 1199.13 | CU4Y (x(Y) 0.2) + CU7Y2 (x(Y) 0.22222) + LIQUID (x(Y) 0.26189) |
| CuY-94Fri-LB.tdb | 1199.13 | CU4Y (x(Y) 0.2) + CU7Y2 (x(Y) 0.22222) + LIQUID (x(Y) 0.26191) |
| CuY-94Fri-LB.tdb | 1199.13 | CU4Y (x(Y) 0.2) + CU7Y2 (x(Y) 0.22222) + LIQUID (x(Y) 0.26161) |
| CuY-94Fri-LB.tdb | 1184.64 | LIQUID (x(Y) 0.13318) + CU6Y (x(Y) 0.14744) + CU4Y (x(Y) 0.2) |
| CuY-94Fri-LB.tdb | 1184.64 | LIQUID (x(Y) 0.13356) + CU6Y (x(Y) 0.14759) + CU4Y (x(Y) 0.2) |
| CuY-94Fri-LB.tdb | 1153.41 | FCC_A1 (x(Y) 0) + LIQUID (x(Y) 0.09395) + CU6Y (x(Y) 0.12885) |
| CuY-94Fri-LB.tdb | 1153.41 | FCC_A1 (x(Y) 0) + LIQUID (x(Y) 0.09383) + CU6Y (x(Y) 0.12878) |
| CuY-94Fri-LB.tdb | 1151.18 | CU7Y2 (x(Y) 0.22222) + LIQUID (x(Y) 0.29845) + CU2Y_H (x(Y) 0.33333) |
| CuY-94Fri-LB.tdb | 1151.18 | CU7Y2 (x(Y) 0.22222) + LIQUID (x(Y) 0.29822) + CU2Y_H (x(Y) 0.33333) |
| CuY-94Fri-LB.tdb | 1151.17 | CU7Y2 (x(Y) 0.22222) + LIQUID (x(Y) 0.29832) + CU2Y_H (x(Y) 0.33333) |
| CuY-94Fri-LB.tdb | 1128 | CU7Y2 (x(Y) 0.22222) + CU2Y_R (x(Y) 0.33333) + CU2Y_H (x(Y) 0.33333) |
| CuY-94Fri-LB.tdb | 1128 | CU2Y_R (x(Y) 0.33333) + CU2Y_H (x(Y) 0.33333) + LIQUID (x(Y) 0.38545) |
| CuY-94Fri-LB.tdb | 1116.09 | CU2Y_R (x(Y) 0.33333) + LIQUID (x(Y) 0.39579) + CUY_B2 (x(Y) 0.5) |
| CuY-94Fri-LB.tdb | 1116.09 | CU2Y_R (x(Y) 0.33333) + LIQUID (x(Y) 0.39575) + CUY_B2 (x(Y) 0.5) |
| CuY-94Fri-LB.tdb | 1077.1 | CUY_B2 (x(Y) 0.5) + LIQUID (x(Y) 0.64484) + HCP_A3 (x(Y) 1) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/CU/CU-Y.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/CU/CU-Y.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Cu–Y system (36)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1224 | congruent melting: Liquid \<=> Cu4Y | Liquid: Y 0.2; Cu4Y: Y 0.2 | model | [1] (ed.) 1998 | Table I, p. 200, row 9; `ORC-UXGHNCS2P5` |  |
| 1220 | congruent melting: Liquid \<=> CuY | Liquid: Y 0.5; CuY: Y 0.5 | model | [1] (ed.) 1998 | Table I, p. 200, row 11; `ORC-6SO2SSVO7P` |  |
| 1203 | L + YCu4 -> YCu6 | YCu4: Y 0.2; YCu6: Y 0.142857 | experimental | [2] Fries 1994; _cites ref. 61Dom_ | Table 2, p. 4, row 34; `ORC-ZEQ6W6JZJS` |  |
| 1198 | peritectic: Liquid \<=> Cu4Y + Cu7Y2 | Liquid: Y 0.262; Cu4Y: Y 0.2; Cu7Y2: Y 0.222 | model | [1] (ed.) 1998 | Table I, p. 200, row 4; `ORC-D3EZAHMC3G` |  |
| 1198 | L + YCu4 -> Y2Cu7 | YCu4: Y 0.2; Y2Cu7: Y 0.222222 | experimental | [2] Fries 1994 | Table 2, p. 4, row 26; `ORC-ZFJN6PKEW4.9b350d` |  |
| 1198 | L + YCu4 -> Y2Cu7 | YCu4: Y 0.2; Y2Cu7: Y 0.222222 | model | [2] Fries 1994 | Table 2, p. 4, row 27; `ORC-ZFJN6PKEW4.be24f9` |  |
| 1193 | L + YCu4 -> Y2Cu7 | YCu4: Y 0.2; Y2Cu7: Y 0.222222 | experimental | [2] Fries 1994; _cites ref. 66Bea_ | Table 2, p. 4, row 25; `ORC-CBSPUZ3WC7` |  |
| 1184 | L + YCu4 -> YCu6 | YCu4: Y 0.2; YCu6: Y 0.142857 | model | [2] Fries 1994 | Table 2, p. 4, row 36; `ORC-TOP7TDJGWD.06338f` |  |
| 1184 | L + YCu4 -> YCu6 | YCu4: Y 0.2; YCu6: Y 0.142857 | experimental | [2] Fries 1994 | Table 2, p. 4, row 35; `ORC-TOP7TDJGWD.67a742` |  |
| 1184 | peritectic: Liquid + Cu4Y \<=> Cu6Y | Liquid: Y 0.133; Cu4Y: Y 0.2; Cu6Y: Y 0.147 | model | [1] (ed.) 1998 | Table I, p. 200, row 5; `ORC-XAE3MSASS7` |  |
| 1183 | L + YCu4 -> YCu6 | YCu4: Y 0.2; YCu6: Y 0.142857 | experimental | [2] Fries 1994; _cites ref. 66Bea_ | Table 2, p. 4, row 33; `ORC-5CNUVJSAJG` |  |
| 1163 | eutectic: L -> (Cu) + YCu6 | YCu6: Y 0.142857 | experimental | [2] Fries 1994; _cites ref. 61Dom_ | Table 2, p. 4, row 39; `ORC-TEPFLTWOEQ` |  |
| 1155 | eutectic: L -> (Cu) + YCu6 | YCu6: Y 0.142857 | experimental | [2] Fries 1994; _cites ref. 89Qi_ | Table 2, p. 4, row 41; `ORC-YLKHOZR6S4` |  |
| 1153 | eutectic: Liquid \<=> fcc-A1 + Cu6Y | Liquid: Y 0.094; fcc-A1: Y 0; Cu6Y: Y 0.129 | model | [1] (ed.) 1998 | Table I, p. 200, row 6; `ORC-746GLM62QZ` |  |
| 1153 | eutectic: L -> (Cu) + YCu6 | YCu6: Y 0.142857 | model | [2] Fries 1994 | Table 2, p. 4, row 43; `ORC-HR75LZ7C6O.a6e29c` |  |
| 1153 | eutectic: L -> (Cu) + YCu6 | YCu6: Y 0.142857 | experimental | [2] Fries 1994 | Table 2, p. 4, row 42; `ORC-HR75LZ7C6O.b3837f` |  |
| 1149 | congruent melting: Liquid \<=> Cu2Y-H | Liquid: Y 0.333; Cu2Y-H: Y 0.333 | model | [1] (ed.) 1998 | Table I, p. 200, row 10; `ORC-NTG4M4PP6R` |  |
| 1149 | eutectic: L -> Y2Cu7 + YCu2 | Y2Cu7: Y 0.222222; YCu2: Y 0.333333 | model | [2] Fries 1994 | Table 2, p. 4, row 24; `ORC-YXQFYN4L4F` |  |
| 1148.6 | eutectic: Liquid \<=> Cu2Y-H + Cu7Y2 | Liquid: Y 0.299; Cu2Y-H: Y 0.333; Cu7Y2: Y 0.222 | model | [1] (ed.) 1998 | Table I, p. 200, row 3; `ORC-JQ4R2Q27JW` |  |
| 1139 | eutectic: L -> (Cu) + YCu6 | YCu6: Y 0.142857 | experimental | [2] Fries 1994; _cites ref. 61Hae_ | Table 2, p. 4, row 38; `ORC-AUIVRGFLMJ` |  |
| 1135 | eutectic: L -> Y2Cu7 + YCu2 | Y2Cu7: Y 0.222222; YCu2: Y 0.333333 | experimental | [2] Fries 1994; _cites ref. 61Hae_ | Table 2, p. 4, row 21; `ORC-QS4AD2HJK3` |  |
| 1133 | eutectic: L -> (Cu) + YCu6 | YCu6: Y 0.142857 | experimental | [2] Fries 1994; _cites ref. 75Fed_ | Table 2, p. 4, row 40; `ORC-OBXXXJJHUL` |  |
| 1128 | polymorphic: Cu2Y-R \<=> Cu2Y-H | Cu2Y-R: Y 0.333; Cu2Y-H: Y 0.333 | model | [1] (ed.) 1998 | Table I, p. 200, row 8; `ORC-TBVVAEDU4S` |  |
| 1127 | eutectic: L -> Y2Cu7 + YCu2 | Y2Cu7: Y 0.222222; YCu2: Y 0.333333 | experimental | [2] Fries 1994; _cites ref. 89Qi_ | Table 2, p. 4, row 23; `ORC-M5MK2BAVLS` |  |
| 1123 | eutectic: L -> (Cu) + YCu6 | YCu6: Y 0.142857 | experimental | [2] Fries 1994; _cites ref. 57Daa_ | Table 2, p. 4, row 37; `ORC-KC22ZHZFXJ` |  |
| 1116 | eutectic: L -> YCu2(r) + YCu | YCu2(r): Y 0.333333; YCu: Y 0.5 | experimental | [2] Fries 1994 | Table 2, p. 4, row 12; `ORC-JVUREU4YHZ` |  |
| 1113 | eutectic: L -> YCu2(r) + YCu | YCu2(r): Y 0.333333; YCu: Y 0.5 | model | [2] Fries 1994 | Table 2, p. 4, row 13; `ORC-CTXSXQTFGK` |  |
| 1113 | eutectic: Liquid \<=> Cu2Y-R + CuY | Liquid: Y 0.396; Cu2Y-R: Y 0.333; CuY: Y 0.5 | model | [1] (ed.) 1998 | Table I, p. 200, row 2; `ORC-ETWJG2L4G6` |  |
| 1113 | eutectic: L -> Y2Cu7 + YCu2 | Y2Cu7: Y 0.222222; YCu2: Y 0.333333 | experimental | [2] Fries 1994; _cites ref. 61Dom_ | Table 2, p. 4, row 22; `ORC-QYLFLGCKBP` |  |
| 1110 | eutectic: L -> YCu2(r) + YCu | YCu2(r): Y 0.333333; YCu: Y 0.5 | experimental | [2] Fries 1994; _cites ref. 89Qi_ | Table 2, p. 4, row 11; `ORC-O2J4FS5UJL` |  |
| 1109 | eutectic: L -> YCu2(r) + YCu | YCu2(r): Y 0.333333; YCu: Y 0.5 | experimental | [2] Fries 1994; _cites ref. 61Hae_ | Table 2, p. 4, row 9; `ORC-EU37VTC5KP` |  |
| 1070 | eutectic: L -> Y + YCu | YCu: Y 0.5 | model | [2] Fries 1994 | Table 2, p. 4, row 4; `ORC-HNGN6Y34OP` |  |
| 1070 | eutectic: L -> Y + YCu | YCu: Y 0.5 | experimental | [2] Fries 1994; _cites ref. 89Qi_ | Table 2, p. 4, row 3; `ORC-KMJD5YMLCH` |  |
| 1070 | eutectic: Liquid \<=> CuY + hcp-A3 | Liquid: Y 0.646; CuY: Y 0.646; hcp-A3: Y 1 | model | [1] (ed.) 1998 | Table I, p. 200, row 1; `ORC-M4EQZMRYMO` |  |
| 1055 | eutectic: L -> Y + YCu | YCu: Y 0.5 | experimental | [2] Fries 1994; _cites ref. 61Hae_ | Table 2, p. 4, row 1; `ORC-W47INOP2JH` |  |
| 1033 | eutectic: L -> Y + YCu | YCu: Y 0.5 | experimental | [2] Fries 1994; _cites ref. 61Dom_ | Table 2, p. 4, row 2; `ORC-HPGS5UBICX` |  |

## Other properties

### Phase transition (17)

Table: Phase transition, Cu–Y system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 1128 K | 1128 | YCu2(r) -> YCu2(h); _YCu2(r): Y 0.333333; YCu2(h): Y 0.333333_ | experimental | [2] Fries 1994 | Table 2, p. 4, row 14; `ORC-NV6KDRHPNP.2fc85f` |  |
| Phase transition | 1128 K | 1128 | YCu2(r) -> YCu2(h); _YCu2(r): Y 0.333333; YCu2(h): Y 0.333333_ | model | [2] Fries 1994 | Table 2, p. 4, row 15; `ORC-NV6KDRHPNP.ff1e4d` |  |
| Phase transition | 1166 K | 1166 | other | experimental | [2] Fries 1994 | p. 3; `ORC-YCECZUQBCR` | “Note that the "liquidus" temperatures (second peak on heating) for all three samples are almost the same, 1166 K upon cooling, indicating a very flat liquidus at YCu2.” |
| Phase transition | 1168 K | 1168 | L -> YCu2(h); _L: Y 0.333333; YCu2(h): Y 0.333333_ | experimental | [2] Fries 1994; _cites ref. 61Hae_ | Table 2, p. 4, row 16; `ORC-DMJFCS3IK3` |  |
| Phase transition | 1170 K | 1170 | L -> YCu2(h); _L: Y 0.333333; YCu2(h): Y 0.333333_ | experimental | [2] Fries 1994; _cites ref. 89Qi_ | Table 2, p. 4, row 18; `ORC-ZQUSFQL43X` |  |
| Phase transition | 1170 K | 1170 | L -> YCu2(h); _L: Y 0.333333; YCu2(h): Y 0.333333_ | experimental | [2] Fries 1994 | Table 2, p. 4, row 19; `ORC-ZRY5SJITEI.4dfca2` |  |
| Phase transition | 1170 K | 1170 | L -> YCu2(h); _L: Y 0.333333; YCu2(h): Y 0.333333_ | model | [2] Fries 1994 | Table 2, p. 4, row 20; `ORC-ZRY5SJITEI.98ebcc` |  |
| Phase transition | 1208 K | 1208 | L -> YCu; _L: Y 0.5; YCu: Y 0.5_ | experimental | [2] Fries 1994; _cites ref. 61Dom_ | Table 2, p. 4, row 6; `ORC-QDXUE6C2G3.b4ca6b` |  |
| Phase transition | 1208 K | 1208 | L -> YCu2(h); _L: Y 0.333333; YCu2(h): Y 0.333333_ | experimental | [2] Fries 1994; _cites ref. 61Dom_ | Table 2, p. 4, row 17; `ORC-QDXUE6C2G3.00ef0a` |  |
| Phase transition | 1220 K | 1220 | L -> YCu; _L: Y 0.5; YCu: Y 0.5_ | experimental | [2] Fries 1994; _cites ref. 89Qi_ | Table 2, p. 4, row 7; `ORC-N4NNJBNZDO` |  |
| Phase transition | 1220 K | 1220 | L -> YCu; _L: Y 0.5; YCu: Y 0.5_ | model | [2] Fries 1994 | Table 2, p. 4, row 8; `ORC-PUUOS3TVVM` |  |
| Phase transition | 1225 K | 1225 | L -> YCu; _L: Y 0.5; YCu: Y 0.5_ | experimental | [2] Fries 1994; _cites ref. 61Hae_ | Table 2, p. 4, row 5; `ORC-5MTHD25AVV` |  |
| Phase transition | 1240 K | 1240 | L -> YCu4; _L: Y 0.2; YCu4: Y 0.2_ | experimental | [2] Fries 1994; _cites ref. 89Qi_ | Table 2, p. 4, row 30; `ORC-GQFSGXFVQD` |  |
| Phase transition | 1244 K | 1244 | L -> YCu4; _L: Y 0.2; YCu4: Y 0.2_ | experimental | [2] Fries 1994 | Table 2, p. 4, row 31; `ORC-QZZX3W7EWY.741bbf` |  |
| Phase transition | 1244 K | 1244 | L -> YCu4; _L: Y 0.2; YCu4: Y 0.2_ | model | [2] Fries 1994 | Table 2, p. 4, row 32; `ORC-QZZX3W7EWY.eba5ba` |  |
| Phase transition | 1248 K | 1248 | L -> YCu4; _L: Y 0.2; YCu4: Y 0.2_ | experimental | [2] Fries 1994; _cites ref. 66Bea_ | Table 2, p. 4, row 29; `ORC-OICA3VTX22` |  |
| Phase transition | 1258 K | 1258 | L -> YCu4; _L: Y 0.2; YCu4: Y 0.2_ | experimental | [2] Fries 1994; _cites ref. 61Dom_ | Table 2, p. 4, row 28; `ORC-SAUXEVCZKV` |  |

### Crystal structure (18)

Table: Crystal structure, Cu–Y system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 4.985 Å ± 0.003 | 973.15 | YCu6; _alloy: Cu 0.8427, Y 0.1573_ | experimental | [2] Fries 1994 | Table I, p. 4, row 5; `ORC-5CS6I2MJ23.008633` |  |
| Lattice a | 4.949 Å ± 0.004 | 973.15 | YCu6; _alloy: Cu 0.881, Y 0.119_ | experimental | [2] Fries 1994 | Table I, p. 4, row 6; `ORC-AFDVV27YAI.d96b74` |  |
| Lattice a | 4.982 Å ± 0.014 | 973.15 | YCu6; _alloy: Cu 0.8322, Y 0.1678_ | experimental | [2] Fries 1994 | Table I, p. 4, row 4; `ORC-L37PPARX7S.3a9c28` |  |
| Lattice a | 4.94 Å ± 0.002 | 1123.15 | YCu6; _alloy: Cu 0.8965, Y 0.1035_ | experimental | [2] Fries 1994 | Table I, p. 4, row 3; `ORC-FEDMT4CQQ4.9c0e30` |  |
| Lattice a | 4.985 Å ± 0.003 | 1123.15 | YCu6; _alloy: Cu 0.8341, Y 0.1659_ | experimental | [2] Fries 1994 | Table I, p. 4, row 1; `ORC-OUL3ZKH5XB.59b096` |  |
| Lattice a | 4.96 Å ± 0.001 | 1123.15 | YCu6; _alloy: Cu 0.8619, Y 0.1381_ | experimental | [2] Fries 1994 | Table I, p. 4, row 2; `ORC-QSKSVBTFHH.31561b` |  |
| Lattice c | 4.124 Å ± 0.004 | 973.15 | YCu6; _alloy: Cu 0.8427, Y 0.1573_ | experimental | [2] Fries 1994 | Table I, p. 4, row 5; `ORC-5CS6I2MJ23.00d967` |  |
| Lattice c | 4.15 Å ± 0.005 | 973.15 | YCu6; _alloy: Cu 0.881, Y 0.119_ | experimental | [2] Fries 1994 | Table I, p. 4, row 6; `ORC-AFDVV27YAI.c036f9` |  |
| Lattice c | 4.122 Å ± 0.021 | 973.15 | YCu6; _alloy: Cu 0.8322, Y 0.1678_ | experimental | [2] Fries 1994 | Table I, p. 4, row 4; `ORC-L37PPARX7S.d1ae69` |  |
| Lattice c | 4.152 Å ± 0.002 | 1123.15 | YCu6; _alloy: Cu 0.8965, Y 0.1035_ | experimental | [2] Fries 1994 | Table I, p. 4, row 3; `ORC-FEDMT4CQQ4.e2b7e6` |  |
| Lattice c | 4.122 Å ± 0.004 | 1123.15 | YCu6; _alloy: Cu 0.8341, Y 0.1659_ | experimental | [2] Fries 1994 | Table I, p. 4, row 1; `ORC-OUL3ZKH5XB.d22a31` |  |
| Lattice c | 4.142 Å ± 0.001 | 1123.15 | YCu6; _alloy: Cu 0.8619, Y 0.1381_ | experimental | [2] Fries 1994 | Table I, p. 4, row 2; `ORC-QSKSVBTFHH.677f24` |  |
| lattice c a | 0.827 not_printed | 973.15 | YCu6; _alloy: Cu 0.8427, Y 0.1573_ | experimental | [2] Fries 1994 | Table I, p. 4, row 5; `ORC-5CS6I2MJ23.11dad4` |  |
| lattice c a | 0.839 not_printed | 973.15 | YCu6; _alloy: Cu 0.881, Y 0.119_ | experimental | [2] Fries 1994 | Table I, p. 4, row 6; `ORC-AFDVV27YAI.c90f7b` |  |
| lattice c a | 0.827 not_printed | 973.15 | YCu6; _alloy: Cu 0.8322, Y 0.1678_ | experimental | [2] Fries 1994 | Table I, p. 4, row 4; `ORC-L37PPARX7S.979ff4` |  |
| lattice c a | 0.84 not_printed | 1123.15 | YCu6; _alloy: Cu 0.8965, Y 0.1035_ | experimental | [2] Fries 1994 | Table I, p. 4, row 3; `ORC-FEDMT4CQQ4.1ee5fc` |  |
| lattice c a | 0.827 not_printed | 1123.15 | YCu6; _alloy: Cu 0.8341, Y 0.1659_ | experimental | [2] Fries 1994 | Table I, p. 4, row 1; `ORC-OUL3ZKH5XB.e17572` |  |
| lattice c a | 0.835 not_printed | 1123.15 | YCu6; _alloy: Cu 0.8619, Y 0.1381_ | experimental | [2] Fries 1994 | Table I, p. 4, row 2; `ORC-QSKSVBTFHH.c51984` |  |

## Sources

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

1. I. Ansara, A. T. Dinsdale, M. H. Rand (eds.), COST 507: Thermochemical database for light metal alloys, Volume 2, EUR 18499 EN, Office for Official Publications of the European Communities, Luxembourg (1998), ISBN 92-828-3902-8.
2. S. G. Fries, H. L. Lukas, R. Konetzki, R. Schmid-Fetzer, Experimental investigation and thermodynamic optimization of the Y-Cu binary system, JPE 15, 606-614 (1994). [doi:10.1007/bf02647621](https://doi.org/10.1007/bf02647621)

## 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/).