# Gd–Zr system

> Gd–Zr system: 96 accepted literature values (crystal structure 44, phase equilibrium 31, invariant reaction 21) and 4 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/GD-ZR.html · Markdown: https://data.orchid-project.org/systems/GD-ZR.md

96 accepted literature values from 3 paper(s) (experimental 84, model 12); 4 calculated phase diagram(s). 4 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/GD-ZR.json) · [CSV](https://data.orchid-project.org/systems/GD-ZR.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#GD-ZR) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#GD-ZR/GdZr-01Zin-LB.json) · [phases (4)](https://data.orchid-project.org/phases/pages/GD-ZR.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/GD-ZR.html) · [Markdown](https://data.orchid-project.org/systems/GD-ZR.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 84 |
| model | 12 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 21 |
| phase equilibrium | 31 |
| crystal structure | 44 |

## 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 |
|---|---|---|---|
| GdZr-01Zin-LB.tdb | M. Zinkevich, N. Mattern, H.J. Seifert, J. Phase Equilib, 22, 43-50(2001). [doi:10.1361/105497101770339283](https://doi.org/10.1361/105497101770339283) | `731c7eb124b1facc5d1cc7e2ddd742ce1982fbbbeb6430cb08c2dc88386877d4` | [viewer](https://orchid-project.org/phase-diagrams/#GD-ZR/GdZr-01Zin-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/GdZr-01Zin-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/GdZr-01Zin-LB.json) |
| GdZr-12Mat.tdb | N. Mattern, J.H. Han, M. Zinkevich, O. Shuleshova, I. Kaban, D. Holland-Moritz, J. Gegner, F. Yang, J. Bednarcik, W. Loeser, J. Eckert, Calphad, 39, 27-32(2012). [doi:10.1016/j.calphad.2012.08.001](https://doi.org/10.1016/j.calphad.2012.08.001) | `ba6c913991472ec314c69cbb8142a0903a3b1c78a012a375532d515c3170a7e0` | [viewer](https://orchid-project.org/phase-diagrams/#GD-ZR/GdZr-12Mat.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/GdZr-12Mat.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/GdZr-12Mat.json) |
| GdZr-14Bo.tdb | H. Bo, L.B. Liu, J.L. Hu, X.D. Zhang, Z.P. Jin, Thermochim. Acta, 591, 51-56(2014). [doi:10.1016/j.tca.2014.07.014](https://doi.org/10.1016/j.tca.2014.07.014) | `d95180cc64867ffa6ec698cf5110fa9bd3d878b84feb0be4aa292c92d1ca4fc0` | [viewer](https://orchid-project.org/phase-diagrams/#GD-ZR/GdZr-14Bo.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/GdZr-14Bo.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/GdZr-14Bo.json) |
| GdZr-18Mat.tdb | N. Mattern, J.H. Han, R. Nowak, O. Fabrichnaya, I. Kaban, O. Shuleshova, N. Sobczak, Calphad, 61, 237-45(2018). [doi:10.1016/j.calphad.2018.04.008](https://doi.org/10.1016/j.calphad.2018.04.008) | `b9962f2048151f056000159c7c9d77e3fab61cda4a7df8fb8389065abcdb6c50` | [viewer](https://orchid-project.org/phase-diagrams/#GD-ZR/GdZr-18Mat.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/GdZr-18Mat.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/GdZr-18Mat.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| GdZr-01Zin-LB.tdb | 1488.45 | HCP_A3 (x(Zr) 0.02535) + BCC_A2 (x(Zr) 0.03042) + LIQUID (x(Zr) 0.10761) |
| GdZr-01Zin-LB.tdb | 1485.56 | HCP_A3 (x(Zr) 0.02617) + LIQUID (x(Zr) 0.11448) + BCC_A2 (x(Zr) 0.93046) |
| GdZr-01Zin-LB.tdb | 1162.41 | HCP_A3 (x(Zr) 0.01856) + HCP_A3#2 (x(Zr) 0.97448) + BCC_A2 (x(Zr) 0.98436) |
| GdZr-12Mat.tdb | 1495.2 | BCC_A2#2 (x(Zr) 0.07259) + LIQUID (x(Zr) 0.16437) + BCC_A2 (x(Zr) 0.9505) |
| GdZr-12Mat.tdb | 1440.64 | HCP_A3 (x(Zr) 0.03859) + BCC_A2#2 (x(Zr) 0.05506) + BCC_A2 (x(Zr) 0.95603) |
| GdZr-12Mat.tdb | 1159.05 | HCP_A3 (x(Zr) 0.03018) + HCP_A3#2 (x(Zr) 0.97228) + BCC_A2 (x(Zr) 0.98125) |
| GdZr-14Bo.tdb | 1494.63 | BCC_A2#2 (x(Zr) 0.07591) + LIQUID (x(Zr) 0.16579) + BCC_A2 (x(Zr) 0.94927) |
| GdZr-14Bo.tdb | 1453.8 | HCP_A3 (x(Zr) 0.03533) + BCC_A2 (x(Zr) 0.05962) + BCC_A2#2 (x(Zr) 0.95411) |
| GdZr-14Bo.tdb | 1148.96 | HCP_A3 (x(Zr) 0.01934) + HCP_A3#2 (x(Zr) 0.98153) + BCC_A2 (x(Zr) 0.98336) |
| GdZr-18Mat.tdb | 1475.4 | BCC_A2#2 (x(Zr) 0.0658) + LIQUID (x(Zr) 0.13301) + BCC_A2 (x(Zr) 0.95255) |
| GdZr-18Mat.tdb | 1440.64 | HCP_A3 (x(Zr) 0.03859) + BCC_A2#2 (x(Zr) 0.05506) + BCC_A2 (x(Zr) 0.95603) |
| GdZr-18Mat.tdb | 1159.05 | HCP_A3 (x(Zr) 0.03018) + HCP_A3#2 (x(Zr) 0.97228) + BCC_A2 (x(Zr) 0.98125) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/GD/GD-ZR.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/GD/GD-ZR.json) · [CALPHAD hull GdZr-01Zin-LB](https://data.orchid-project.org/hulls/calphad-sgte/GD/GD-ZR--GdZr-01Zin-LB.json) · [CALPHAD hull GdZr-12Mat](https://data.orchid-project.org/hulls/calphad-sgte/GD/GD-ZR--GdZr-12Mat.json) · [CALPHAD hull GdZr-14Bo](https://data.orchid-project.org/hulls/calphad-sgte/GD/GD-ZR--GdZr-14Bo.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Gd–Zr system (21)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1495 | eutectic: Liquid -> bcc_Gd + bcc_Zr |  | experimental | [1] Bo 2014; _cites Mattern 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.08.001) | Table 3, p. 5, row 1; `ORC-AMXUR4BNHX.13be62` |  |
| 1495 | eutectic: Liquid -> bcc_Gd + bcc_Zr | Liquid: Zr 0.164; bcc_Gd: Zr 0.073; bcc_Zr: Zr 0.951 | model | [1] Bo 2014; _cites Mattern 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.08.001) | Table 3, p. 5, row 2; `ORC-AMXUR4BNHX.4a8101` |  |
| 1495 | eutectic: L -> bcc-Gd + bcc-Zr |  | experimental | [2] Mattern 2012 | Table 4, p. 6, row 2; `ORC-BUSABXIMD4.2d96c9` |  |
| 1495 | eutectic: L -> bcc-Gd + bcc-Zr | L: Zr 0.164; bcc-Gd: Zr 0.073; bcc-Zr: Zr 0.951 | model | [2] Mattern 2012 | Table 4, p. 6, row 1; `ORC-BUSABXIMD4.910e14` |  |
| 1495 | eutectic: Liquid -> bcc_Gd + bcc_Zr | Liquid: Zr 0.166; bcc_Gd: Zr 0.076; bcc_Zr: Zr 0.949 | model | [1] Bo 2014 | Table 3, p. 5, row 3; `ORC-TV33675C2R` |  |
| 1493 | eutectic: Liquid \<=> hcp-Gd + bcc-Zr | Liquid: Zr 0.3; hcp-Gd: Zr 0.025 | experimental | [3] Zinkevich 2001; _cites Copeland 1964_ | Table 4, p. 7, row 2; `ORC-MIWWHVRAAN` |  |
| 1491 | eutectic: Liquid \<=> hcp-Gd + bcc-Zr | Liquid: Zr 0.275; hcp-Gd: Zr 0.01; bcc-Zr: Zr 0.92 | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 4, p. 7, row 1; `ORC-SACUGSBRAH` |  |
| 1488 | metatectic/catatectic: Liquid + bcc-Gd \<=> hcp-Gd | Liquid: Zr 0.1076; bcc-Gd: Zr 0.0304; hcp-Gd: Zr 0.0254 | model | [3] Zinkevich 2001 | Table 4, p. 7, row 6; `ORC-WG5D7CAFY6` |  |
| 1486 | eutectic: Liquid \<=> hcp-Gd + bcc-Zr | Liquid: Zr 0.1145; hcp-Gd: Zr 0.0262; bcc-Zr: Zr 0.9305 | model | [3] Zinkevich 2001 | Table 4, p. 7, row 3; `ORC-SR7R5MSKOE` |  |
| 1455 | bcc_Gd -> hcp_Gd + bcc_Zr |  | experimental | [1] Bo 2014; _cites Mattern 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.08.001) | Table 3, p. 5, row 4; `ORC-47V3JB6L2H` |  |
| 1455 | bcc-Gd -> hcp-Gd + bcc-Zr |  | experimental | [2] Mattern 2012 | Table 4, p. 6, row 4; `ORC-NENFGOUKJV` |  |
| 1454 | bcc_Gd -> hcp_Gd + bcc_Zr | bcc_Gd: Zr 0.06; hcp_Gd: Zr 0.035; bcc_Zr: Zr 0.954 | model | [1] Bo 2014 | Table 3, p. 5, row 6; `ORC-OEGGOM6Q3N` |  |
| 1441 | bcc-Gd -> hcp-Gd + bcc-Zr | bcc-Gd: Zr 0.055; hcp-Gd: Zr 0.038; bcc-Zr: Zr 0.956 | model | [2] Mattern 2012 | Table 4, p. 6, row 3; `ORC-4WLD5FWQWT` |  |
| 1441 | bcc_Gd -> hcp_Gd + bcc_Zr | bcc_Gd: Zr 0.055; hcp_Gd: Zr 0.038; bcc_Zr: Zr 0.956 | model | [1] Bo 2014; _cites Mattern 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.08.001) | Table 3, p. 5, row 5; `ORC-EJTUSTRSZJ` |  |
| 1163 | peritectoid: bcc-Zr + hcp-Gd \<=> hcp-Zr | bcc-Zr: Zr 0.988; hcp-Gd: Zr 0.01; hcp-Zr: Zr 0.97 | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 4, p. 7, row 4; `ORC-ZBY4VCJYNL` |  |
| 1162 | peritectoid: bcc-Zr + hcp-Gd \<=> hcp-Zr | bcc-Zr: Zr 0.9844; hcp-Gd: Zr 0.0186; hcp-Zr: Zr 0.9745 | model | [3] Zinkevich 2001 | Table 4, p. 7, row 5; `ORC-5DWTINUDUV` |  |
| 1159 | bcc_Zr + hcp_Gd -> hcp_Zr | bcc_Zr: Zr 0.981; hcp_Gd: Zr 0.03; hcp_Zr: Zr 0.972 | model | [1] Bo 2014; _cites Mattern 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.08.001) | Table 3, p. 5, row 8; `ORC-PTN6NUL2CS` |  |
| 1159 | hcp-Gd + bcc-Zr -> hcp-Zr | hcp-Gd: Zr 0.03; bcc-Zr: Zr 0.981; hcp-Zr: Zr 0.972 | model | [2] Mattern 2012 | Table 4, p. 6, row 5; `ORC-SEB3PH6IIC` |  |
| 1149 | bcc_Zr + hcp_Gd -> hcp_Zr | bcc_Zr: Zr 0.983; hcp_Gd: Zr 0.019; hcp_Zr: Zr 0.982 | model | [1] Bo 2014 | Table 3, p. 5, row 9; `ORC-N73ISNY4E5` |  |
| 1145 | hcp-Gd + bcc-Zr -> hcp-Zr |  | experimental | [2] Mattern 2012 | Table 4, p. 6, row 6; `ORC-BSLRERKAVA` |  |
| 1145 | bcc_Zr + hcp_Gd -> hcp_Zr |  | experimental | [1] Bo 2014; _cites Mattern 2012_ [doi](https://doi.org/10.1016/j.calphad.2012.08.001) | Table 3, p. 5, row 7; `ORC-Z3KBHXRAYU` |  |

## Other properties

### Phase equilibrium (31)

Table: Phase equilibrium, Gd–Zr system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase composition |  |  | Eutectic + Chemical analysis (bulk); _Eutectic: Gd 0.816, Zr 0.184; Chemical analysis (bulk): Gd 0.802, Zr 0.198_ | experimental | [2] Mattern 2012 | Table 2, p. 5, row 2; `ORC-MG2RACAYZN` |  |
| Phase composition |  |  | Gd-dendrite + Chemical analysis (bulk); _Gd-dendrite: Gd 0.938, Zr 0.062; Chemical analysis (bulk): Gd 0.831, Zr 0.169_ | experimental | [2] Mattern 2012 | Table 2, p. 5, row 1; `ORC-VCMMX4D7SR` |  |
| Phase composition |  |  | Zr-dendrite + Eutectic + Chemical analysis (bulk); _Zr-dendrite: Gd 0.058, Zr 0.942; Eutectic: Gd 0.82, Zr 0.18; Chemical analysis (bulk): Gd 0.768, Zr 0.232_ | experimental | [2] Mattern 2012 | Table 2, p. 5, row 3; `ORC-2ZS4XMB4NT` |  |
| Phase composition |  | 873 | hcp-Zr; _hcp-Zr: Gd 0.015, Zr 0.985_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 19; `ORC-2UJCKLGHO4` |  |
| Phase composition |  | 973 | hcp-Zr; _hcp-Zr: Gd 0.016, Zr 0.984_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 20; `ORC-2Q2I2VTKRB` |  |
| Phase composition |  | 1073 | hcp-Zr; _hcp-Zr: Gd 0.025, Zr 0.975_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 21; `ORC-7CU3P64XJK` |  |
| Phase composition |  | 1141 | bcc-Zr; _bcc-Zr: Gd 0.008, Zr 0.992_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 22; `ORC-IKSU4LC55P` |  |
| Phase composition |  | 1141 | hcp-Zr + bcc-Zr; _hcp-Zr: Gd 0.03, Zr 0.97; bcc-Zr: Gd 0.003, Zr 0.997_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 28; `ORC-I77MY466YJ` |  |
| Phase composition |  | 1143 | hcp-Zr + bcc-Zr; _hcp-Zr: Gd 0.03, Zr 0.97; bcc-Zr: Gd 0.003, Zr 0.997_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 27; `ORC-ZJLRJMVBUS` |  |
| Phase composition |  | 1163 | bcc-Zr + hcp-Gd + hcp-Zr; _bcc-Zr: Gd 0.012, Zr 0.988; hcp-Gd: Gd 0.99, Zr 0.01; hcp-Zr: Gd 0.03, Zr 0.97_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 4; `ORC-GA3QIB6MDZ` |  |
| Phase composition |  | 1318 | bcc-Zr; _bcc-Zr: Gd 0.042, Zr 0.958_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 23; `ORC-J5SRM7ERX3` |  |
| Phase composition |  | 1423 | bcc-Zr; _bcc-Zr: Gd 0.054, Zr 0.946_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 24; `ORC-PVDR674EJY` |  |
| Phase composition |  | 1463 | hcp-Gd; _hcp-Gd: Gd 0.975, Zr 0.025_ | experimental | [3] Zinkevich 2001; _cites Copeland 1964_ | Table 1, p. 2, row 26; `ORC-FWQKIRW3TH` |  |
| Phase composition |  | 1473 | bcc-Zr; _bcc-Zr: Gd 0.067, Zr 0.933_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 25; `ORC-Y7IU4C7TSG` |  |
| Phase composition |  | 1491 | Liquid + hcp-Gd + bcc-Zr; _Liquid: Gd 0.725, Zr 0.275; hcp-Gd: Gd 0.99, Zr 0.01; bcc-Zr: Gd 0.08, Zr 0.92_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 2; `ORC-BOBUXNW5I2` |  |
| Phase composition |  | 1493 | Liquid + hcp-Gd; _Liquid: Gd 0.7, Zr 0.3; hcp-Gd: Gd 0.975, Zr 0.025_ | experimental | [3] Zinkevich 2001; _cites Copeland 1964_ | Table 1, p. 2, row 3; `ORC-5I2VQ4BVFK` |  |
| Phase composition |  | 1526 | Liquid; _Liquid: Gd 0.917, Zr 0.083_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 15; `ORC-G3Y47KRSJS` |  |
| Phase composition |  | 1533 | bcc-Zr; _bcc-Zr: Gd 0.067, Zr 0.933_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 18; `ORC-UAMOU4VAGJ` |  |
| Phase composition |  | 1549 | Liquid; _Liquid: Gd 0.967, Zr 0.033_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 14; `ORC-JAVA33HA6P` |  |
| Phase composition |  | 1603 | Liquid; _Liquid: Gd 0.64, Zr 0.36_ | experimental | [3] Zinkevich 2001; _cites Love 1960_ | Table 1, p. 2, row 1; `ORC-J6GQXS36YF` |  |
| Phase composition |  | 1727 | Liquid; _Liquid: Gd 0.367, Zr 0.633_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 13; `ORC-RKBYPXEBYW` |  |
| Phase composition |  | 1771 | Liquid; _Liquid: Gd 0.279, Zr 0.721_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 12; `ORC-IXJRZKYZQS` |  |
| Phase composition |  | 1836 | Liquid; _Liquid: Gd 0.238, Zr 0.762_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 11; `ORC-LPJVOU4T5W` |  |
| Phase composition |  | 1887 | Liquid; _Liquid: Gd 0.199, Zr 0.801_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 10; `ORC-CO55OMAFZD` |  |
| Phase composition |  | 1915 | Liquid; _Liquid: Gd 0.162, Zr 0.838_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 9; `ORC-LEFNSBML26` |  |
| Phase composition |  | 1940 | Liquid; _Liquid: Gd 0.127, Zr 0.873_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 8; `ORC-T3JYMHX6UC` |  |
| Phase composition |  | 1990 | bcc-Zr; _bcc-Zr: Gd 0.061, Zr 0.939_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 17; `ORC-JIZSDKMLGY` |  |
| Phase composition |  | 1992 | Liquid; _Liquid: Gd 0.093, Zr 0.907_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 7; `ORC-H6VLDZEAY6` |  |
| Phase composition |  | 2029 | bcc-Zr; _bcc-Zr: Gd 0.03, Zr 0.97_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 16; `ORC-RV6OWSETTA` |  |
| Phase composition |  | 2041 | Liquid; _Liquid: Gd 0.061, Zr 0.939_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 6; `ORC-RSWJ7KMVNG` |  |
| Phase composition |  | 2063 | Liquid; _Liquid: Gd 0.03, Zr 0.97_ | experimental | [3] Zinkevich 2001; _cites Copeland 1960_ | Table 1, p. 2, row 5; `ORC-FDPAXQUDJB` |  |

### Crystal structure (44)

Table: Crystal structure, Gd–Zr system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| lattice a0 | 3.256 Å ± 0.001 | 1051 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 12; `ORC-A2K7FOX7ZY.9f60db` |  |
| lattice a0 | 3.653 Å ± 10 | 1051 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 1; `ORC-NGV5N6TNYJ.3d274a` |  |
| lattice a0 | 3.256 Å ± 10 | 1051 | hcp-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 1; `ORC-NGV5N6TNYJ.dc45b8` |  |
| lattice a0 | 3.653 Å ± 10 | 1123 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 2; `ORC-2QI6LRXCAF.f206f5` |  |
| lattice a0 | 3.259 Å ± 0.001 | 1123 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 13; `ORC-C6SCM7E5AH.0ac440` |  |
| lattice a0 | 3.259 Å ± 10 | 1123 | hcp-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 2; `ORC-2QI6LRXCAF.600e63` |  |
| lattice a0 | 3.62 Å ± 10 | 1211 | bcc-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 3; `ORC-5STM35Q3AJ.2f23d1` |  |
| lattice a0 | 3.657 Å ± 10 | 1211 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 3; `ORC-5STM35Q3AJ.d44874` |  |
| lattice a0 | 3.626 Å ± 10 | 1253 | bcc-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 4; `ORC-A676SKOJMR.5701e9` |  |
| lattice a0 | 3.656 Å ± 10 | 1253 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 4; `ORC-A676SKOJMR.2ad63b` |  |
| lattice a0 | 3.626 Å ± 0.001 | 1253 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 14; `ORC-EFZFY2NCK7` |  |
| lattice a0 | 3.63 Å ± 10 | 1318 | bcc-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 5; `ORC-XEDWKIBCQU.70c4ed` |  |
| lattice a0 | 3.63 Å ± 0.001 | 1318 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 15; `ORC-NGRWODEH3G` |  |
| lattice a0 | 3.655 Å ± 10 | 1318 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 5; `ORC-XEDWKIBCQU.1ae093` |  |
| lattice a0 | 3.636 Å ± 10 | 1353 | bcc-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 6; `ORC-I2ONE2RRED.38c9f9` |  |
| lattice a0 | 3.654 Å ± 10 | 1353 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 6; `ORC-I2ONE2RRED.3d33c3` |  |
| lattice a0 | 3.636 Å ± 0.001 | 1353 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 16; `ORC-MYET7CXHXL` |  |
| lattice a0 | 3.64 Å ± 10 | 1413 | bcc-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 7; `ORC-ANROJBLCE5.2c7a9f` |  |
| lattice a0 | 3.653 Å ± 10 | 1413 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 7; `ORC-ANROJBLCE5.bbf08d` |  |
| lattice a0 | 3.64 Å ± 0.001 | 1413 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 17; `ORC-XAOWYC6VKF` |  |
| lattice a0 | 3.641 Å ± 10 | 1423 | bcc-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 8; `ORC-PWMIQO7S4K.0c899c` |  |
| lattice a0 | 3.641 Å ± 0.001 | 1423 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 18; `ORC-HVFDN5I7HF` |  |
| lattice a0 | 3.656 Å ± 10 | 1423 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 8; `ORC-PWMIQO7S4K.f3ad5b` |  |
| lattice a0 | 3.641 Å ± 10 | 1433 | bcc-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 9; `ORC-IIK32GEF2L.a3aeef` |  |
| lattice a0 | 3.656 Å ± 10 | 1433 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 9; `ORC-IIK32GEF2L.af1cd7` |  |
| lattice a0 | 3.648 Å ± 0.001 | 1483 | bcc-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 19; `ORC-CBQTSS7CT4` |  |
| lattice a0 | 4.056 Å ± 10 | 1483 | bcc-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 10; `ORC-ZGCND3344F.521902` |  |
| lattice a0 | 3.648 Å ± 10 | 1483 | bcc-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 10; `ORC-ZGCND3344F.fdf191` |  |
| lattice a0 | 4.059 Å ± 10 | 1493 | bcc-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 11; `ORC-GXVR6TZZ4I.e99dc9` |  |
| lattice a0 | 3.65 Å ± 0.001 | 1493 | bcc-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 20; `ORC-PHA667C3OE` |  |
| lattice a0 | 3.65 Å ± 10 | 1493 | bcc-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 11; `ORC-GXVR6TZZ4I.e25756` |  |
| lattice c0 | 5.175 Å ± 0.002 | 1051 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 12; `ORC-A2K7FOX7ZY.159453` |  |
| lattice c0 | 5.82 Å ± 20 | 1051 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 1; `ORC-NGV5N6TNYJ.a557e9` |  |
| lattice c0 | 5.175 Å ± 20 | 1051 | hcp-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 1; `ORC-NGV5N6TNYJ.9a62a6` |  |
| lattice c0 | 5.827 Å ± 20 | 1123 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 2; `ORC-2QI6LRXCAF.5a8eea` |  |
| lattice c0 | 5.177 Å ± 0.002 | 1123 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 13; `ORC-C6SCM7E5AH.41be05` |  |
| lattice c0 | 5.177 Å ± 20 | 1123 | hcp-Zr; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 2; `ORC-2QI6LRXCAF.86b892` |  |
| lattice c0 | 5.833 Å ± 20 | 1211 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 3; `ORC-5STM35Q3AJ.0e998c` |  |
| lattice c0 | 5.841 Å ± 20 | 1253 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 4; `ORC-A676SKOJMR.0d5e5d` |  |
| lattice c0 | 5.844 Å ± 20 | 1318 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 5; `ORC-XEDWKIBCQU.86ad38` |  |
| lattice c0 | 5.845 Å ± 20 | 1353 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 6; `ORC-I2ONE2RRED.4591ba` |  |
| lattice c0 | 5.85 Å ± 20 | 1413 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 7; `ORC-ANROJBLCE5.ce9c5b` |  |
| lattice c0 | 5.854 Å ± 20 | 1423 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 8; `ORC-PWMIQO7S4K.71ec1d` |  |
| lattice c0 | 5.854 Å ± 20 | 1433 | hcp-Gd; _alloy: Gd 0.35, Zr 0.65_ | experimental | [2] Mattern 2012 | Table 1, p. 3, row 9; `ORC-IIK32GEF2L.24e0b6` |  |

## Sources

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

1. H. Bo, L.B. Liu, J.L. Hu, X.D. Zhang, Z.P. Jin, Thermodynamic re-assessment of the Al–Gd and Gd–Zr systems, Thermochimica Acta 591, 51-56 (2014). [doi:10.1016/j.tca.2014.07.014](https://doi.org/10.1016/j.tca.2014.07.014)
2. N. Mattern, J.H. Han, M. Zinkevich, O. Shuleshova, I. Kaban, D. Holland-Moritz et al., Experimental and thermodynamic assessment of the Gd–Zr system, Calphad 39, 27-32 (2012). [doi:10.1016/j.calphad.2012.08.001](https://doi.org/10.1016/j.calphad.2012.08.001)
3. M. Zinkevich, N. Mattern, H. J. Seifer, Thermodynamic assessment of Gd-Zr and Gd-Mo systems, JPE 22, 43-50 (2001). [doi:10.1361/105497101770339283](https://doi.org/10.1361/105497101770339283)

## 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/).