# Cu–Dy system

> Cu–Dy system: 109 accepted literature values (invariant reaction 50, crystal structure 39, formation 11, phase transition 9) and 2 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

109 accepted literature values from 2 paper(s) (experimental 65, model 26, DFT 18); 2 calculated phase diagram(s). 6 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-DY.json) · [CSV](https://data.orchid-project.org/systems/CU-DY.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CU-DY) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#CU-DY/CuDy-09Pal.json) · [phases (12)](https://data.orchid-project.org/phases/pages/CU-DY.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CU-DY.html) · [Markdown](https://data.orchid-project.org/systems/CU-DY.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 65 |
| model | 26 |
| DFT | 18 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 50 |
| phase transition | 9 |
| formation | 11 |
| crystal structure | 39 |

## 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 |
|---|---|---|---|
| CuDy-09Pal.tdb | M. Palumbo, L. Battezzati, A. Pasturel, S. Gottlieb-Schoenmeyer, W. Assmus, Calphad, 33, 511-16(2009). [doi:10.1016/j.calphad.2009.04.001](https://doi.org/10.1016/j.calphad.2009.04.001) | `12983d67968493e1939437762ceab1854ecc9793431c3041baeb645535d8ede2` | [viewer](https://orchid-project.org/phase-diagrams/#CU-DY/CuDy-09Pal.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CuDy-09Pal.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CuDy-09Pal.json) |
| CuDy-09Zha.tdb | L.G. Zhang, G.X. Huang, H.Y. Qi, B.R. Jia, L.B. Liu, Z.P. Jin, J. Alloys Compd., 470, 214-17(2009). [doi:10.1016/j.jallcom.2008.03.007](https://doi.org/10.1016/j.jallcom.2008.03.007) | `6c6f9d652328ae39e78168af5c1d977a941f960619e30791dd2d5145706d0513` | [viewer](https://orchid-project.org/phase-diagrams/#CU-DY/CuDy-09Zha.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CuDy-09Zha.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CuDy-09Zha.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| CuDy-09Pal.tdb | 1654.22 | LIQUID (x(Dy) 0.98444) + HCP_A3 (x(Dy) 0.99979) + BCC_A2 (x(Dy) 0.99981) |
| CuDy-09Pal.tdb | 1654.22 | LIQUID (x(Dy) 0.98444) + HCP_A3 (x(Dy) 0.99979) + BCC_A2 (x(Dy) 0.99981) |
| CuDy-09Pal.tdb | 1235.81 | LIQUID (x(Dy) 0.16239) + CU5DY (x(Dy) 0.16667) + CU9DY2 (x(Dy) 0.18182) |
| CuDy-09Pal.tdb | 1235.81 | LIQUID (x(Dy) 0.16245) + CU5DY (x(Dy) 0.16667) + CU9DY2 (x(Dy) 0.18182) |
| CuDy-09Pal.tdb | 1235.81 | LIQUID (x(Dy) 0.16229) + CU5DY (x(Dy) 0.16667) + CU9DY2 (x(Dy) 0.18182) |
| CuDy-09Pal.tdb | 1208.18 | CU9DY2 (x(Dy) 0.18182) + CU7DY2 (x(Dy) 0.22222) + LIQUID (x(Dy) 0.23077) |
| CuDy-09Pal.tdb | 1208.18 | CU9DY2 (x(Dy) 0.18182) + CU7DY2 (x(Dy) 0.22222) + LIQUID (x(Dy) 0.23066) |
| CuDy-09Pal.tdb | 1133.97 | LIQUID (x(Dy) 0.09038) + CU7DY (x(Dy) 0.125) + CU5DY (x(Dy) 0.16667) |
| CuDy-09Pal.tdb | 1133.97 | LIQUID (x(Dy) 0.09021) + CU7DY (x(Dy) 0.125) + CU5DY (x(Dy) 0.16667) |
| CuDy-09Pal.tdb | 1133.97 | LIQUID (x(Dy) 0.09012) + CU7DY (x(Dy) 0.125) + CU5DY (x(Dy) 0.16667) |
| CuDy-09Pal.tdb | 1133.97 | LIQUID (x(Dy) 0.09012) + CU7DY (x(Dy) 0.125) + CU5DY (x(Dy) 0.16667) |
| CuDy-09Pal.tdb | 1127.08 | CU9DY2 (x(Dy) 0.18182) + CU7DY2 (x(Dy) 0.22222) + LIQUID (x(Dy) 0.27514) |
| CuDy-09Pal.tdb | 1127.08 | CU9DY2 (x(Dy) 0.18182) + CU7DY2 (x(Dy) 0.22222) + LIQUID (x(Dy) 0.27529) |
| CuDy-09Pal.tdb | 1127.08 | CU9DY2 (x(Dy) 0.18182) + CU7DY2 (x(Dy) 0.22222) + LIQUID (x(Dy) 0.27524) |
| CuDy-09Pal.tdb | 1126.08 | FCC_A1 (x(Dy) 0) + LIQUID (x(Dy) 0.08522) + CU7DY (x(Dy) 0.125) |
| CuDy-09Pal.tdb | 1126.08 | FCC_A1 (x(Dy) 0) + LIQUID (x(Dy) 0.08524) + CU7DY (x(Dy) 0.125) |
| CuDy-09Pal.tdb | 1126.08 | FCC_A1 (x(Dy) 0) + LIQUID (x(Dy) 0.08519) + CU7DY (x(Dy) 0.125) |
| CuDy-09Pal.tdb | 1126.08 | FCC_A1 (x(Dy) 0) + LIQUID (x(Dy) 0.08518) + CU7DY (x(Dy) 0.125) |
| CuDy-09Pal.tdb | 1121.05 | CU2DY (x(Dy) 0.33333) + LIQUID (x(Dy) 0.39105) + CUDY_B2 (x(Dy) 0.5) |
| CuDy-09Pal.tdb | 1121.05 | CU2DY (x(Dy) 0.33333) + LIQUID (x(Dy) 0.39104) + CUDY_B2 (x(Dy) 0.5) |
| CuDy-09Pal.tdb | 1119.88 | CU9DY2 (x(Dy) 0.18182) + LIQUID (x(Dy) 0.27835) + CU2DY (x(Dy) 0.33333) |
| CuDy-09Pal.tdb | 1119.88 | CU9DY2 (x(Dy) 0.18182) + LIQUID (x(Dy) 0.27845) + CU2DY (x(Dy) 0.33333) |
| CuDy-09Pal.tdb | 1050.99 | FCC_A1 (x(Dy) 0) + CU7DY (x(Dy) 0.125) + CU5DY (x(Dy) 0.16667) |
| CuDy-09Pal.tdb | 1050.99 | FCC_A1 (x(Dy) 0) + CU7DY (x(Dy) 0.125) + CU5DY (x(Dy) 0.16667) |
| CuDy-09Pal.tdb | 1019.54 | CUDY_B2 (x(Dy) 0.5) + LIQUID (x(Dy) 0.6912) + HCP_A3 (x(Dy) 0.99862) |
| CuDy-09Zha.tdb | 1235.15 | LIQUID (x(Dy) 0.15568) + CU5DY_D2D (x(Dy) 0.16667) + CU9DY2 (x(Dy) 0.18182) |
| CuDy-09Zha.tdb | 1235.15 | LIQUID (x(Dy) 0.15572) + CU5DY_D2D (x(Dy) 0.16667) + CU9DY2 (x(Dy) 0.18182) |
| CuDy-09Zha.tdb | 1235.15 | LIQUID (x(Dy) 0.15561) + CU5DY_D2D (x(Dy) 0.16667) + CU9DY2 (x(Dy) 0.18182) |
| CuDy-09Zha.tdb | 1203 | CU5DY_D2D (x(Dy) 0.16667) + CU5DY_C15B (x(Dy) 0.16667) + CU9DY2 (x(Dy) 0.18182) |
| CuDy-09Zha.tdb | 1203 | LIQUID (x(Dy) 0.11897) + CU5DY_C15B (x(Dy) 0.16667) + CU5DY_D2D (x(Dy) 0.16667) |
| CuDy-09Zha.tdb | 1203 | LIQUID (x(Dy) 0.11877) + CU5DY_D2D (x(Dy) 0.16667) + CU5DY_C15B (x(Dy) 0.16667) |
| CuDy-09Zha.tdb | 1203 | LIQUID (x(Dy) 0.11877) + CU5DY_D2D (x(Dy) 0.16667) + CU5DY_C15B (x(Dy) 0.16667) |
| CuDy-09Zha.tdb | 1174.15 | LIQUID (x(Dy) 0.10247) + CU7DY (x(Dy) 0.125) + CU5DY_C15B (x(Dy) 0.16667) |
| CuDy-09Zha.tdb | 1174.15 | LIQUID (x(Dy) 0.10238) + CU7DY (x(Dy) 0.125) + CU5DY_C15B (x(Dy) 0.16667) |
| CuDy-09Zha.tdb | 1174.15 | LIQUID (x(Dy) 0.10229) + CU7DY (x(Dy) 0.125) + CU5DY_C15B (x(Dy) 0.16667) |
| CuDy-09Zha.tdb | 1172.79 | CU9DY2 (x(Dy) 0.18182) + CU7DY2 (x(Dy) 0.22222) + LIQUID (x(Dy) 0.25782) |
| CuDy-09Zha.tdb | 1172.79 | CU9DY2 (x(Dy) 0.18182) + CU7DY2 (x(Dy) 0.22222) + LIQUID (x(Dy) 0.25772) |
| CuDy-09Zha.tdb | 1157.43 | FCC_A1 (x(Dy) 3.000e-5) + LIQUID (x(Dy) 0.08798) + CU7DY (x(Dy) 0.125) |
| CuDy-09Zha.tdb | 1157.43 | FCC_A1 (x(Dy) 3.000e-5) + LIQUID (x(Dy) 0.08793) + CU7DY (x(Dy) 0.125) |
| CuDy-09Zha.tdb | 1131.86 | CU9DY2 (x(Dy) 0.18182) + CU7DY2 (x(Dy) 0.22222) + LIQUID (x(Dy) 0.27776) |
| CuDy-09Zha.tdb | 1131.86 | CU9DY2 (x(Dy) 0.18182) + CU7DY2 (x(Dy) 0.22222) + LIQUID (x(Dy) 0.2779) |
| CuDy-09Zha.tdb | 1131.86 | CU9DY2 (x(Dy) 0.18182) + CU7DY2 (x(Dy) 0.22222) + LIQUID (x(Dy) 0.27784) |
| CuDy-09Zha.tdb | 1123.09 | CU9DY2 (x(Dy) 0.18182) + LIQUID (x(Dy) 0.28166) + CU2DY (x(Dy) 0.33333) |
| CuDy-09Zha.tdb | 1123.09 | CU9DY2 (x(Dy) 0.18182) + LIQUID (x(Dy) 0.28174) + CU2DY (x(Dy) 0.33333) |
| CuDy-09Zha.tdb | 1120.69 | CU2DY (x(Dy) 0.33333) + LIQUID (x(Dy) 0.38975) + CUDY_B2 (x(Dy) 0.5) |
| CuDy-09Zha.tdb | 1120.69 | CU2DY (x(Dy) 0.33333) + LIQUID (x(Dy) 0.38959) + CUDY_B2 (x(Dy) 0.5) |
| CuDy-09Zha.tdb | 1063.86 | CUDY_B2 (x(Dy) 0.5) + LIQUID (x(Dy) 0.65429) + BCC_A2 (x(Dy) 0.76541) |
| CuDy-09Zha.tdb | 1063.86 | CUDY_B2 (x(Dy) 0.5) + LIQUID (x(Dy) 0.65434) + BCC_A2 (x(Dy) 0.76544) |
| CuDy-09Zha.tdb | 1054.1 | FCC_A1 (x(Dy) 1.000e-5) + CU7DY (x(Dy) 0.125) + CU5DY_C15B (x(Dy) 0.16667) |
| CuDy-09Zha.tdb | 1054.1 | FCC_A1 (x(Dy) 1.000e-5) + CU7DY (x(Dy) 0.125) + CU5DY_C15B (x(Dy) 0.16667) |
| CuDy-09Zha.tdb | 1054.1 | FCC_A1 (x(Dy) 1.000e-5) + CU7DY (x(Dy) 0.125) + CU5DY_C15B (x(Dy) 0.16667) |
| CuDy-09Zha.tdb | 803.02 | CUDY_B2 (x(Dy) 0.5) + BCC_A2 (x(Dy) 0.83248) + HCP_A3 (x(Dy) 0.87939) |
| CuDy-09Zha.tdb | 803.02 | CUDY_B2 (x(Dy) 0.5) + BCC_A2 (x(Dy) 0.83251) + HCP_A3 (x(Dy) 0.87942) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/CU/CU-DY.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/CU/CU-DY.json) · [CALPHAD hull CuDy-09Zha](https://data.orchid-project.org/hulls/calphad-sgte/CU/CU-DY--CuDy-09Zha.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Cu–Dy system (50)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1243 | congruent melting: liquid -> Cu9Dy2 | Cu9Dy2: Dy 0.182; liquid: Dy 0.182 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 12; `ORC-MT2FODR5MJ` |  |
| 1242 | congruent melting: liquid -> Cu9Dy2 | Cu9Dy2: Dy 0.182; liquid: Dy 0.182 | model | [1] Palumbo 2009 | Table 3, p. 5, row 11; `ORC-UCATDCD4EC` |  |
| 1238 | liquid + Cu9Dy2 -> Cu5Dy | Cu9Dy2: Dy 0.182; Cu5Dy: Dy 0.167; liquid: Dy 0.162 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 10; `ORC-JUTVDA7GKE` |  |
| 1238 | peritectic: L + Cu9Dy2 ↔ Cu5Dy.L | L: Dy 0.162; Cu9Dy2: Dy 0.182; Cu5Dy.L: Dy 0.083 | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 3, row 10; `ORC-L6A3XGPZHK` |  |
| 1236 | liquid + Cu9Dy2 -> Cu5Dy | Cu9Dy2: Dy 0.182; Cu5Dy: Dy 0.167; liquid: Dy 0.162 | model | [1] Palumbo 2009 | Table 3, p. 5, row 9; `ORC-5LISXH2IMI` |  |
| 1235 | peritectic: L + Cu9Dy2 ↔ Cu5Dy.L | L: Dy 0.156; Cu9Dy2: Dy 0.182; Cu5Dy.L: Dy 0.083 | model | [2] Zhang 2009 | Table 3, p. 3, row 9; `ORC-55BWHL7QJJ` |  |
| 1228 | congruent melting: liquid -> CuDy | CuDy: Dy 0.5; liquid: Dy 0.5 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 24; `ORC-4FTAKVFKOZ` |  |
| 1227 | congruent melting: liquid -> CuDy | CuDy: Dy 0.5; liquid: Dy 0.5 | model | [1] Palumbo 2009 | Table 3, p. 5, row 23; `ORC-65XSBPJ32H` |  |
| 1208 | liquid + Cu9Dy2 -> Cu7Dy2 | Cu9Dy2: Dy 0.182; Cu7Dy2: Dy 0.222; liquid: Dy 0.231 | model | [1] Palumbo 2009 | Table 3, p. 5, row 13; `ORC-UPCFFOPWA6` |  |
| 1178 | liquid + Cu9Dy2 -> Cu7Dy2 | Cu9Dy2: Dy 0.182; Cu7Dy2: Dy 0.222; liquid: Dy 0.258 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 14; `ORC-2PSFT42JAF` |  |
| 1178 | peritectic: L + Cu9Dy2 ↔ Cu7Dy2 | Cu9Dy2: Dy 0.182; Cu7Dy2: Dy 0.222 | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 3, row 16; `ORC-QNCLJZSGZL` |  |
| 1174 | peritectic: L + Cu5Dy.L ↔ Cu7Dy | L: Dy 0.102; Cu5Dy.L: Dy 0.083; Cu7Dy: Dy 0.125 | model | [2] Zhang 2009 | Table 3, p. 3, row 3; `ORC-QI3H2HYBZS` |  |
| 1172 | peritectic: L + Cu9Dy2 ↔ Cu7Dy2 | L: Dy 0.258; Cu9Dy2: Dy 0.182; Cu7Dy2: Dy 0.222 | model | [2] Zhang 2009 | Table 3, p. 3, row 15; `ORC-ZNHLCXVRKJ` |  |
| 1165 | peritectic: L + Cu5Dy.L ↔ Cu7Dy | Cu5Dy.L: Dy 0.083; Cu7Dy: Dy 0.125 | experimental | [2] Zhang 2009; _cites Cheng 1982_ | Table 3, p. 3, row 4; `ORC-BRNAAKDJAY` |  |
| 1165 | liquid + Cu5Dy -> Cu7Dy | Cu5Dy: Dy 0.167; Cu7Dy: Dy 0.125; liquid: Dy 0.102 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 4; `ORC-MS3FGGHHFY` |  |
| 1163 | congruent melting: liquid -> Cu2Dy | Cu2Dy: Dy 0.333; liquid: Dy 0.333 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 20; `ORC-CRILC3KA5M` |  |
| 1157 | eutectic: L ↔ Fcc + Cu7Dy | L: Dy 0.088; Fcc: Dy 0; Cu7Dy: Dy 0.125 | model | [2] Zhang 2009 | Table 3, p. 3, row 1; `ORC-PAEYUIA46Y` |  |
| 1156 | congruent melting: liquid -> Cu2Dy | Cu2Dy: Dy 0.333; liquid: Dy 0.333 | model | [1] Palumbo 2009 | Table 3, p. 5, row 19; `ORC-PX7KWH47JA` |  |
| 1153 | eutectic: L ↔ Fcc + Cu7Dy | L: Dy 0.074; Fcc: Dy 0; Cu7Dy: Dy 0.125 | experimental | [2] Zhang 2009; _cites Cheng 1982_ | Table 3, p. 3, row 2; `ORC-LC53Q6V3UG` |  |
| 1138 | eutectic: L ↔ Cu9Dy2 + Cu2Dy | Cu9Dy2: Dy 0.182; Cu2Dy: Dy 0.333 | experimental | [2] Zhang 2009; _cites Cheng 1982_ | Table 3, p. 3, row 21; `ORC-J6HCN2B46U` |  |
| 1134 | liquid + Cu5Dy -> Cu7Dy | Cu5Dy: Dy 0.167; Cu7Dy: Dy 0.125; liquid: Dy 0.09 | model | [1] Palumbo 2009 | Table 3, p. 5, row 3; `ORC-NFXBFPEKGC` |  |
| 1133 | liquid + Cu5Dy -> Cu7Dy | Cu5Dy: Dy 0.167; Cu7Dy: Dy 0.125; liquid: Dy 0.102 | experimental | [1] Palumbo 2009; _cites Cheng 1982_ | Table 3, p. 5, row 5; `ORC-4X55SKTOTU` |  |
| 1133 | peritectic: L + Cu5Dy.L ↔ Cu7Dy | L: Dy 0.102; Cu5Dy.L: Dy 0.083; Cu7Dy: Dy 0.125 | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 3, row 5; `ORC-EURYJMW5LX` |  |
| 1131 | metatectic/catatectic: Cu7Dy2 ↔ L + Cu9Dy2 | Cu7Dy2: Dy 0.222; L: Dy 0.278; Cu9Dy2: Dy 0.182 | model | [2] Zhang 2009 | Table 3, p. 3, row 17; `ORC-6BSZDW4UXE` |  |
| 1128 | Cu7Dy2 -> liquid + Cu9Dy2 | Cu7Dy2: Dy 0.222; Cu9Dy2: Dy 0.182; liquid: Dy 0.287 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 16; `ORC-65GWUOVURX` |  |
| 1128 | metatectic/catatectic: Cu7Dy2 ↔ L + Cu9Dy2 | Cu7Dy2: Dy 0.222; Cu9Dy2: Dy 0.182 | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 3, row 18; `ORC-DXV2XBIF2I` |  |
| 1128 | eutectic: liquid -> Cu fcc + Cu7Dy | Cu fcc: Dy 0; Cu7Dy: Dy 0.125; liquid: Dy 0.1 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 2; `ORC-SYLELY6QYX` |  |
| 1127 | Cu7Dy2 -> liquid + Cu9Dy2 | Cu7Dy2: Dy 0.222; Cu9Dy2: Dy 0.182; liquid: Dy 0.276 | model | [1] Palumbo 2009 | Table 3, p. 5, row 15; `ORC-TVCUDS4ART` |  |
| 1126 | eutectic: liquid -> Cu fcc + Cu7Dy | Cu fcc: Dy 0; Cu7Dy: Dy 0.125; liquid: Dy 0.085 | model | [1] Palumbo 2009 | Table 3, p. 5, row 1; `ORC-OOFG32TAO7` |  |
| 1123 | eutectic: L ↔ Cu9Dy2 + Cu2Dy | L: Dy 0.282; Cu9Dy2: Dy 0.182; Cu2Dy: Dy 0.333 | model | [2] Zhang 2009 | Table 3, p. 3, row 19; `ORC-ZK3UESFCRR` |  |
| 1121 | eutectoid: Cu7Dy ↔ Fcc + Cu5Dy.L | Cu7Dy: Dy 0.125; Fcc: Dy 0; Cu5Dy.L: Dy 0.083 | experimental | [2] Zhang 2009; _cites Cheng 1982_ | Table 3, p. 3, row 8; `ORC-2YZFVTKP5I` |  |
| 1121 | eutectic: liquid -> Cu2Dy + CuDy | Cu2Dy: Dy 0.333; CuDy: Dy 0.5; liquid: Dy 0.391 | model | [1] Palumbo 2009 | Table 3, p. 5, row 21; `ORC-BAWGNIOGVX` |  |
| 1121 | Cu7Dy -> Cu fcc + Cu5Dy | Cu7Dy: Dy 0.125; Cu fcc: Dy 0; Cu5Dy: Dy 0.167 | experimental | [1] Palumbo 2009; _cites Cheng 1982_ | Table 3, p. 5, row 8; `ORC-VYC63ANMJ3` |  |
| 1120 | eutectic: liquid -> Cu9Dy2 + Cu2Dy | Cu9Dy2: Dy 0.182; Cu2Dy: Dy 0.333; liquid: Dy 0.278 | model | [1] Palumbo 2009 | Table 3, p. 5, row 17; `ORC-36I3D3D4VM` |  |
| 1120 | eutectic: L ↔ Cu2Dy + CuDy | L: Dy 0.39; Cu2Dy: Dy 0.333; CuDy: Dy 0.5 | model | [2] Zhang 2009 | Table 3, p. 3, row 24; `ORC-GLKYJDOVQJ` |  |
| 1118 | eutectic: L ↔ Cu9Dy2 + Cu2Dy | L: Dy 0.29; Cu9Dy2: Dy 0.182; Cu2Dy: Dy 0.333 | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 3, row 20; `ORC-M5BMLBFA6A` |  |
| 1118 | eutectic: liquid -> Cu9Dy2 + Cu2Dy | Cu9Dy2: Dy 0.182; Cu2Dy: Dy 0.333; liquid: Dy 0.29 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 18; `ORC-UCI5OXBKHF` |  |
| 1113 | eutectic: L ↔ Cu2Dy + CuDy | Cu2Dy: Dy 0.333; CuDy: Dy 0.5 | experimental | [2] Zhang 2009; _cites Cheng 1982_ | Table 3, p. 3, row 26; `ORC-A5GXLL43TI` |  |
| 1113 | eutectic: L ↔ Cu2Dy + CuDy | L: Dy 0.395; Cu2Dy: Dy 0.333; CuDy: Dy 0.5 | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 3, row 25; `ORC-BUEOC6LP6K` |  |
| 1113 | eutectic: liquid -> Cu2Dy + CuDy | Cu2Dy: Dy 0.333; CuDy: Dy 0.5; liquid: Dy 0.395 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 22; `ORC-SACNNMGHPQ` |  |
| 1081 | eutectic: L ↔ CuDy + Bcc | L: Dy 0.741; CuDy: Dy 0.5 | experimental | [2] Zhang 2009; _cites Cheng 1982_ | Table 3, p. 3, row 31; `ORC-KQAKBYBTAV` |  |
| 1063 | eutectic: L ↔ CuDy + Bcc | L: Dy 0.654; CuDy: Dy 0.5; Bcc: Dy 0.775 | model | [2] Zhang 2009 | Table 3, p. 3, row 29; `ORC-HC3KTPBCLC` |  |
| 1063 | eutectic: L ↔ CuDy + Bcc | L: Dy 0.7; CuDy: Dy 0.5 | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 3, row 30; `ORC-ICNRH4FV3K` |  |
| 1063 | eutectic: liquid -> CuDy + Dy bcc | CuDy: Dy 0.5; Dy bcc: Dy 1; liquid: Dy 0.7 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 26; `ORC-UQBQD6CQWH` |  |
| 1054 | eutectoid: Cu7Dy ↔ Fcc + Cu5Dy.L | Cu7Dy: Dy 0.125; Fcc: Dy 0; Cu5Dy.L: Dy 0.083 | model | [2] Zhang 2009 | Table 3, p. 3, row 6; `ORC-DWE4PNTZDM` |  |
| 1048 | eutectoid: Cu7Dy ↔ Fcc + Cu5Dy.L | Cu7Dy: Dy 0.125; Fcc: Dy 0; Cu5Dy.L: Dy 0.083 | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 3, row 7; `ORC-7H7W54MND4` |  |
| 1048 | Cu7Dy -> Cu fcc + Cu5Dy | Cu7Dy: Dy 0.125; Cu fcc: Dy 0; Cu5Dy: Dy 0.167 | model | [1] Palumbo 2009 | Table 3, p. 5, row 6; `ORC-D6FSZSKN2S` |  |
| 1048 | Cu7Dy -> Cu fcc + Cu5Dy | Cu7Dy: Dy 0.125; Cu fcc: Dy 0; Cu5Dy: Dy 0.167 | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 5, row 7; `ORC-WTPLRUS4HH` |  |
| 1020 | eutectic: liquid -> CuDy + Dy bcc | CuDy: Dy 0.5; Dy bcc: Dy 1; liquid: Dy 0.691 | model | [1] Palumbo 2009 | Table 3, p. 5, row 25; `ORC-OPRZYSXO2T` |  |
| 803 | eutectoid: Bcc ↔ CuDy + Hcp | Bcc: Dy 0.832; CuDy: Dy 0.5; Hcp: Dy 0.879 | model | [2] Zhang 2009 | Table 3, p. 3, row 32; `ORC-IOWK77NHR3` |  |

## 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, Cu–Dy system (11)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Cu2Dy |  | -27.9 kJ/mol-atom | 0 | DFT |  |  | [1] Palumbo 2009 | Table 2, p. 4, row 4; `ORC-ZXR2SCNQAJ` |  |
| Cu2Dy |  | -26.1 kJ/mol-atom | 0 | DFT |  |  | [1] Palumbo 2009 | Table 2, p. 4, row 5; `ORC-EARUEDH2OR` |  |
| Cu2Dy | [Cu2Dy](https://data.orchid-project.org/compounds/Cu2Dy.html) | -24.4 kJ/mol-atom | 298.15 | experimental | -26.052 (mp-aaacizol) | -26.104 (oqmd-1435876) | [1] Palumbo 2009; _cites Meschel 2005_ [doi](https://doi.org/10.1016/j.jallcom.2004.08.062) | Table 2, p. 4, row 7; `ORC-NUVJUGFJ2O` |  |
| Cu2Dy | [Cu2Dy](https://data.orchid-project.org/compounds/Cu2Dy.html) | -16.4 kJ/mol-atom | 298.15 | experimental | -26.052 (mp-aaacizol) | -26.104 (oqmd-1435876) | [1] Palumbo 2009; _cites Sommer 2009_ | Table 2, p. 4, row 6; `ORC-ITUAKEDPX5` |  |
| Cu5Dy |  | -19.4 kJ/mol-atom | 0 | DFT |  |  | [1] Palumbo 2009 | Table 2, p. 4, row 1; `ORC-LYRIXQAQTR` |  |
| Cu5Dy |  | -18.8 kJ/mol-atom | 0 | DFT |  |  | [1] Palumbo 2009 | Table 2, p. 4, row 2; `ORC-YZA6XQC6W2` |  |
| Cu5Dy | [Cu5Dy](https://data.orchid-project.org/compounds/Cu5Dy.html) | -15.7 kJ/mol-atom | 298.15 | experimental | -18.422 (mp-aaacrspf) | -18.593 (oqmd-1519615) | [1] Palumbo 2009; _cites Meschel 2005_ [doi](https://doi.org/10.1016/j.jallcom.2004.08.062) | Table 2, p. 4, row 3; `ORC-6YBX53BGH7` |  |
| CuDy |  | -27.1 kJ/mol-atom | 0 | DFT |  |  | [1] Palumbo 2009 | Table 2, p. 4, row 8; `ORC-3JSGL7B2UN` |  |
| CuDy |  | -25.5 kJ/mol-atom | 0 | DFT |  |  | [1] Palumbo 2009 | Table 2, p. 4, row 9; `ORC-W3COO6M77J` |  |
| CuDy | [CuDy](https://data.orchid-project.org/compounds/CuDy.html) | -24 kJ/mol-atom | 298.15 | experimental | -23.951 (mp-aaaaadlu) | -25.4 (oqmd-1369598) | [1] Palumbo 2009; _cites Meschel 2005_ [doi](https://doi.org/10.1016/j.jallcom.2004.08.062) | Table 2, p. 4, row 11; `ORC-BZMXE37WAA` |  |
| CuDy | [CuDy](https://data.orchid-project.org/compounds/CuDy.html) | -12.5 kJ/mol-atom | 298.15 | experimental | -23.951 (mp-aaaaadlu) | -25.4 (oqmd-1369598) | [1] Palumbo 2009; _cites Sommer 2009_ | Table 2, p. 4, row 10; `ORC-JAKQWTU62G` |  |

## Other properties

### Phase transition (9)

Table: Phase transition, Cu–Dy system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 1150 K | 1150 | congruent melting: L ↔ Cu2Dy; _L: Dy 0.333333; Cu2Dy: Dy 0.333333_ | model | [2] Zhang 2009 | Table 3, p. 3, row 22; `ORC-K6AXRTQ5JX` |  |
| Phase transition | 1163 K | 1163 | congruent melting: L ↔ Cu2Dy; _L: Dy 0.333333; Cu2Dy: Dy 0.333333_ | experimental | [2] Zhang 2009; _cites Copeland 1964_ | Table 3, p. 3, row 23; `ORC-JZMPOWFHNZ` |  |
| Phase transition | 1203 K | 1203 | polymorphic: Cu5Dy.H ↔ CuDy.L; _Cu5Dy.H: Dy 0.166667; CuDy.L: Dy 0.166667_ | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 3, row 12; `ORC-MJHRYYLL3P` |  |
| Phase transition | 1203 K | 1203 | polymorphic: Cu5Dy.H ↔ CuDy.L; _Cu5Dy.H: Dy 0.166667; CuDy.L: Dy 0.166667_ | model | [2] Zhang 2009 | Table 3, p. 3, row 11; `ORC-SNTH5BSH7J` |  |
| Phase transition | 1203.15 K | 1203.15 | Cu5 Dy | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | p. 2; `ORC-QJGBBOHRHQ` | “He found a thermal effect at 930 ◦ C corresponding to the stoichiometry of Cu5 Dy.” |
| Phase transition | 1220 K | 1220 | congruent melting: L ↔ CuDy; _L: Dy 0.5; CuDy: Dy 0.5_ | model | [2] Zhang 2009 | Table 3, p. 3, row 27; `ORC-6FIE2H2FNJ` |  |
| Phase transition | 1228 K | 1228 | congruent melting: L ↔ CuDy; _L: Dy 0.5; CuDy: Dy 0.5_ | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 3, row 28; `ORC-AHRRT5KDMP` |  |
| Phase transition | 1243 K | 1243 | congruent melting: L ↔ Cu9Dy2; _L: Dy 0.181818; Cu9Dy2: Dy 0.181818_ | model | [2] Zhang 2009 | Table 3, p. 3, row 13; `ORC-6LU4UTBUYR` |  |
| Phase transition | 1245 K | 1245 | congruent melting: L ↔ Cu9Dy2; _L: Dy 0.181818; Cu9Dy2: Dy 0.181818_ | experimental | [2] Zhang 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 3, p. 3, row 14; `ORC-QNOMAIPWI5` |  |

### Crystal structure (39)

Table: Crystal structure, Cu–Dy system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 4.3 Å |  | Cu2Dy; _alloy: Dy 0.333333_ | experimental | [1] Palumbo 2009; _cites Storm 1963_ [doi](https://doi.org/10.1107/s0365110x6300181x) | Table 1, p. 2, row 12; `ORC-JH6NZ2IVV6.a0b896` |  |
| Lattice a | 4.303 Å |  | Cu2Dy; _alloy: Dy 0.333333_ | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 1, p. 2, row 13; `ORC-RIOJQYZNND.65d8d4` |  |
| Lattice a | 4.2488 Å | 0 | Cu2Dy; _alloy: Dy 0.333333_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 16; `ORC-RNO2BJI3JZ.d28ea7` |  |
| Lattice a | 28.37 Å |  | Cu4Dy; _alloy: Dy 0.2_ | experimental | [1] Palumbo 2009; _cites Cerny 2003_ [doi](https://doi.org/10.1016/s0022-4596%2803%2900187-7) | Table 1, p. 2, row 9; `ORC-LPTHP32CQ6.b60767` |  |
| Lattice a | 4.932 Å |  | Cu7Dy; _alloy: Dy 0.125_ | experimental | [1] Palumbo 2009; _cites Buschow 1971_ [doi](https://doi.org/10.1107/s0567740871003558) | Table 1, p. 2, row 1; `ORC-372GGS5C7Z.0bcebb` |  |
| Lattice a | 4.922 Å | 0 | Cu7Dy; _alloy: Dy 0.125_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 2; `ORC-ANK3JUAYDR.8d8bdf` |  |
| Lattice a | 21.33 Å |  | Cu7Dy2; _alloy: Dy 0.222222_ | experimental | [1] Palumbo 2009; _cites Cerny 2003_ [doi](https://doi.org/10.1016/s0022-4596%2803%2900187-7) | Table 1, p. 2, row 11; `ORC-QH5UTC666I.fc36b0` |  |
| Lattice a | 49.55 Å |  | Cu9Dy2; _alloy: Dy 0.181818_ | experimental | [1] Palumbo 2009; _cites Cerny 2003_ [doi](https://doi.org/10.1016/s0022-4596%2803%2900187-7) | Table 1, p. 2, row 10; `ORC-6TQBDUHFYN.89043d` |  |
| Lattice a | 3.46 Å |  | CuDy; _alloy: Dy 0.5_ | experimental | [1] Palumbo 2009; _cites Chao 1964_ [doi](https://doi.org/10.1063/1.1713089) | Table 1, p. 2, row 18; `ORC-3A7NX5URD7` |  |
| Lattice a | 3.461 Å |  | CuDy; _alloy: Dy 0.5_ | experimental | [1] Palumbo 2009; _cites Dwight 1965_ | Table 1, p. 2, row 20; `ORC-3MPKHKP6S5` |  |
| Lattice a | 7.087 Å | 0 | CuDy; _alloy: Dy 0.5_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 25; `ORC-6TVNZJ264B.1abeca` |  |
| Lattice a | 3.4789 Å | 0 | CuDy; _alloy: Dy 0.5_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 24; `ORC-AHBCEQBABB` |  |
| Lattice a | 3.455 Å |  | CuDy; _alloy: Dy 0.5_ | experimental | [1] Palumbo 2009; _cites Belakhovsky 1971_ [doi](https://doi.org/10.1016/0038-1098%2871%2990407-8) | Table 1, p. 2, row 21; `ORC-GADGBGBHC7` |  |
| Lattice a | 3.455 Å |  | CuDy; _alloy: Dy 0.5_ | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 1, p. 2, row 22; `ORC-KHAYXZGJ7P` |  |
| Lattice a | 3.461 Å |  | CuDy; _alloy: Dy 0.5_ | experimental | [1] Palumbo 2009; _cites Baenziger 1961_ [doi](https://doi.org/10.1107/s0365110x6100276x) | Table 1, p. 2, row 17; `ORC-KM54O27532` |  |
| Lattice a | 3.444 Å |  | CuDy; _alloy: Dy 0.5_ | experimental | [1] Palumbo 2009; _cites Pierre 1965_ | Table 1, p. 2, row 19; `ORC-WOABP2V7KP` |  |
| Lattice a | 7.022 Å |  | α-Cu5Dy; _alloy: Dy 0.166667_ | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 1, p. 2, row 4; `ORC-BRRXI2EJVV` |  |
| Lattice a | 7.0058 Å | 0 | α-Cu5Dy; _alloy: Dy 0.166667_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 6; `ORC-FTDBTYFX36` |  |
| Lattice a | 7.027 Å |  | α-Cu5Dy; _alloy: Dy 0.166667_ | experimental | [1] Palumbo 2009; _cites Buschow 1969_ [doi](https://doi.org/10.1016/0022-5088%2869%2990189-1) | Table 1, p. 2, row 3; `ORC-XES5QQ6JRI` |  |
| Lattice a | 4.9839 Å | 0 | β-Cu5Dy; _alloy: Dy 0.166667_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 8; `ORC-AE37GNTMMQ.0e89f4` |  |
| Lattice a | 5.02 Å |  | β-Cu5Dy; _alloy: Dy 0.166667_ | experimental | [1] Palumbo 2009; _cites Carnasciali 1983_ [doi](https://doi.org/10.1016/0022-5088%2883%2990235-7) | Table 1, p. 2, row 7; `ORC-CJCVAJCDHS.785cd8` |  |
| Lattice b | 6.792 Å |  | Cu2Dy; _alloy: Dy 0.333333_ | experimental | [1] Palumbo 2009; _cites Storm 1963_ [doi](https://doi.org/10.1107/s0365110x6300181x) | Table 1, p. 2, row 12; `ORC-JH6NZ2IVV6.181675` |  |
| Lattice b | 6.802 Å |  | Cu2Dy; _alloy: Dy 0.333333_ | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 1, p. 2, row 13; `ORC-RIOJQYZNND.b2aff9` |  |
| Lattice b | 6.767 Å | 0 | Cu2Dy; _alloy: Dy 0.333333_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 16; `ORC-RNO2BJI3JZ.1372e3` |  |
| Lattice b | 28.36 Å |  | Cu4Dy; _alloy: Dy 0.2_ | experimental | [1] Palumbo 2009; _cites Cerny 2003_ [doi](https://doi.org/10.1016/s0022-4596%2803%2900187-7) | Table 1, p. 2, row 9; `ORC-LPTHP32CQ6.2b30c3` |  |
| Lattice b | 21.29 Å |  | Cu7Dy2; _alloy: Dy 0.222222_ | experimental | [1] Palumbo 2009; _cites Cerny 2003_ [doi](https://doi.org/10.1016/s0022-4596%2803%2900187-7) | Table 1, p. 2, row 11; `ORC-QH5UTC666I.0093f0` |  |
| Lattice b | 49.56 Å |  | Cu9Dy2; _alloy: Dy 0.181818_ | experimental | [1] Palumbo 2009; _cites Cerny 2003_ [doi](https://doi.org/10.1016/s0022-4596%2803%2900187-7) | Table 1, p. 2, row 10; `ORC-6TQBDUHFYN.f5bd12` |  |
| Lattice b | 4.449 Å | 0 | CuDy; _alloy: Dy 0.5_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 25; `ORC-6TVNZJ264B.97317f` |  |
| Lattice c | 7.3 Å |  | Cu2Dy; _alloy: Dy 0.333333_ | experimental | [1] Palumbo 2009; _cites Storm 1963_ [doi](https://doi.org/10.1107/s0365110x6300181x) | Table 1, p. 2, row 12; `ORC-JH6NZ2IVV6.2a9a7d` |  |
| Lattice c | 7.289 Å |  | Cu2Dy; _alloy: Dy 0.333333_ | experimental | [1] Palumbo 2009; _cites Franceschi 1982_ [doi](https://doi.org/10.1016/0022-5088%2882%2990092-3) | Table 1, p. 2, row 13; `ORC-RIOJQYZNND.3ae87d` |  |
| Lattice c | 7.281 Å | 0 | Cu2Dy; _alloy: Dy 0.333333_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 16; `ORC-RNO2BJI3JZ.9b0d5b` |  |
| Lattice c | 25.658 Å |  | Cu4Dy; _alloy: Dy 0.2_ | experimental | [1] Palumbo 2009; _cites Cerny 2003_ [doi](https://doi.org/10.1016/s0022-4596%2803%2900187-7) | Table 1, p. 2, row 9; `ORC-LPTHP32CQ6.f7dda7` |  |
| Lattice c | 4.156 Å |  | Cu7Dy; _alloy: Dy 0.125_ | experimental | [1] Palumbo 2009; _cites Buschow 1971_ [doi](https://doi.org/10.1107/s0567740871003558) | Table 1, p. 2, row 1; `ORC-372GGS5C7Z.4dab3e` |  |
| Lattice c | 4.148 Å | 0 | Cu7Dy; _alloy: Dy 0.125_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 2; `ORC-ANK3JUAYDR.f867ac` |  |
| Lattice c | 18.91 Å |  | Cu7Dy2; _alloy: Dy 0.222222_ | experimental | [1] Palumbo 2009; _cites Cerny 2003_ [doi](https://doi.org/10.1016/s0022-4596%2803%2900187-7) | Table 1, p. 2, row 11; `ORC-QH5UTC666I.773d7d` |  |
| Lattice c | 46.33 Å |  | Cu9Dy2; _alloy: Dy 0.181818_ | experimental | [1] Palumbo 2009; _cites Cerny 2003_ [doi](https://doi.org/10.1016/s0022-4596%2803%2900187-7) | Table 1, p. 2, row 10; `ORC-6TQBDUHFYN.b64b21` |  |
| Lattice c | 5.346 Å | 0 | CuDy; _alloy: Dy 0.5_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 25; `ORC-6TVNZJ264B.8b8569` |  |
| Lattice c | 4.0939 Å | 0 | β-Cu5Dy; _alloy: Dy 0.166667_ | DFT | [1] Palumbo 2009 | Table 1, p. 2, row 8; `ORC-AE37GNTMMQ.54c050` |  |
| Lattice c | 4.08 Å |  | β-Cu5Dy; _alloy: Dy 0.166667_ | experimental | [1] Palumbo 2009; _cites Carnasciali 1983_ [doi](https://doi.org/10.1016/0022-5088%2883%2990235-7) | Table 1, p. 2, row 7; `ORC-CJCVAJCDHS.12e477` |  |

## Sources

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

1. M. Palumbo, L. Battezzati, A. Pasturel, S. Gottlieb-Schönmeyer, W. Assmus, Thermodynamic and ab initio investigation of the Cu–Dy system, Calphad 33, 511-516 (2009). [doi:10.1016/j.calphad.2009.04.001](https://doi.org/10.1016/j.calphad.2009.04.001)
2. L.G. Zhang, G.X. Huang, H.Y. Qi, B.R. Jia, L.B. Liu, Z.P. Jin, Thermodynamic assessment of the Cu–Dy binary system, Journal of Alloys and Compounds 470, 214-217 (2009). [doi:10.1016/j.jallcom.2008.03.007](https://doi.org/10.1016/j.jallcom.2008.03.007)

## 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/).