# Fe–Gd phases > Fe–Gd system: 11 phases (tier A 5, tier C 3, liquid 1, needs_review 2); 11 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references. HTML: https://data.orchid-project.org/phases/pages/FE-GD.html · Markdown: https://data.orchid-project.org/phases/pages/FE-GD.md 11 phases (tier A 5, tier C 3, liquid 1, needs_review 2); 11 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model). Data: [interactive registry](https://orchid-project.org/phases/?q=FE-GD) · [full JSON](https://data.orchid-project.org/phases/systems/FE-GD.json) · [Fe–Gd system page](https://data.orchid-project.org/systems/FE-GD.html) · [Markdown](https://data.orchid-project.org/phases/pages/FE-GD.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Fe–Gd system (11) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BCC_A2](#phase-fe-gd-bcc-a2); _phase:fe-gd:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 6 of 6 calculated diagram(s): 300–2499.85 K, x(Gd) 0–1 | 36 | 6 | | [FCC_A1](#phase-fe-gd-fcc-a1); _phase:fe-gd:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 6 of 6 calculated diagram(s): 1159.86–1667.47 K, x(Gd) 0–0.01105 | 30 | 6 | | [FE17GD2](#phase-fe-gd-fe17gd2); _phase:fe-gd:fe17gd2_ | | needs_review | stable in 2 of 2 calculated diagram(s): 300–1603.94 K, x(Gd) 0.10526–0.10526 | 10 | 2 | | [FE17GD2_HT](#phase-fe-gd-fe17gd2-ht); _phase:fe-gd:fe17gd2-ht_ | Ni17Th2 · hP38 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 4 of 4 calculated diagram(s): 1482.48–1608.6 K, x(Gd) 0.10526–0.10526 | 18 | 4 | | [FE17GD2_LT](#phase-fe-gd-fe17gd2-lt); _phase:fe-gd:fe17gd2-lt_ | Th2Zn17 · hR19 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 4 of 4 calculated diagram(s): 300–1488.35 K, x(Gd) 0.10526–0.10526 | 6 | 4 | | [FE23GD6](#phase-fe-gd-fe23gd6); _phase:fe-gd:fe23gd6_ | | needs_review | stable in 1 of 1 calculated diagram(s): 300–1551.48 K, x(Gd) 0.2069–0.2069 | 11 | 1 | | [FE23GD6_D8A](#phase-fe-gd-fe23gd6-d8a); _phase:fe-gd:fe23gd6-d8a_ | Mn23Th6 · D8_a · cF116 · Fm-3m (225) | tier A: standard phase name | stable in 5 of 5 calculated diagram(s): 300–1556.2 K, x(Gd) 0.2069–0.2069 | 9 | 5 | | [FE2GD_C15](#phase-fe-gd-fe2gd-c15); _phase:fe-gd:fe2gd-c15_ | Cu2Mg · C15 · cF24 · Fd-3m (227) | tier A: standard phase name | stable in 6 of 6 calculated diagram(s): 300–1470.3 K, x(Gd) 0.33333–0.33333 | 27 | 6 | | [FE3GD](#phase-fe-gd-fe3gd); _phase:fe-gd:fe3gd_ | Ni3Pu · hR12 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 6 of 6 calculated diagram(s): 300–1433.33 K, x(Gd) 0.25–0.25 | 30 | 6 | | [HCP_A3](#phase-fe-gd-hcp-a3); _phase:fe-gd:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 6 of 6 calculated diagram(s): 300–1583 K, x(Gd) 0.99025–1 | 17 | 6 | | [LIQUID](#phase-fe-gd-liquid); _phase:fe-gd:liquid_ | liquid | liquid | stable in 6 of 6 calculated diagram(s): 1087.34–2500 K, x(Gd) 0–1 | 79 | 6 | ## BCC_A2 (Fe–Gd) - Id: `phase:fe-gd:bcc-a2`; status `assigned` - Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high - Stability: stable in 6 of 6 calculated diagram(s): 300–2499.85 K, x(Gd) 0–1 - Literature: 36 values (36 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:fe-gd:bcc-a2) Names (14): _corpus: _corpus:phase:fe-gd:bcc-a2 _paper: _paper:10.1016/0925-8388(95)01578-7:b.c.c., paper:10.1034/j.1600-0692.2002.311310106.x:αFe, paper:10.1034/j.1600-0692.2002.311310106.x:βGd, paper:10.1034/j.1600-0692.2002.311310106.x:δFe, paper:10.1361/105497100770339923:αFe, paper:10.1361/105497100770339923:βGd, paper:10.1361/105497100770339923:δFe _tdb: _tdb:FeGd-00Zin.tdb:BCC_A2, tdb:FeGd-02Zin-newGd.tdb:BCC_A2, tdb:FeGd-02Zin.tdb:BCC_A2, tdb:FeGd-12Wan.tdb:BCC_A2, tdb:FeGd-17Che.tdb:BCC_A2, tdb:FeGd-95Liu.tdb:BCC_A2 ### TDB models of BCC_A2 (6): PHASE and CONSTITUENT statements as written [FeGd-00Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-00Zin.tdb): BCC_A2, type code %B, sha256 `c29d3c3fbef2ea49…` ~~~~text 42: PHASE BCC_A2 %B 2 1 3 ! 43: CONST BCC_A2 : FE% GD% : VA : ! ~~~~ [FeGd-02Zin-newGd.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin-newGd.tdb): BCC_A2, type code %B, sha256 `f16780fed3b16558…` ~~~~text 49: PHASE BCC_A2 %B 2 1 3 ! 50: CONST BCC_A2 : FE% GD% : VA : ! ~~~~ [FeGd-02Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin.tdb): BCC_A2, type code %B, sha256 `ccf919e5867bc088…` ~~~~text 49: PHASE BCC_A2 %B 2 1 3 ! 50: CONST BCC_A2 : FE% GD% : VA : ! ~~~~ [FeGd-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-12Wan.tdb): BCC_A2, type code %B, sha256 `f83f09ebff484a46…` ~~~~text 44: PHASE BCC_A2 %B 2 1 3 ! 45: CONST BCC_A2 : FE% GD% : VA : ! ~~~~ [FeGd-17Che.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-17Che.tdb): BCC_A2, type code %B, sha256 `6eae73757a5ee767…` ~~~~text 45: PHASE BCC_A2 %B 2 1 3 ! 46: CONST BCC_A2 : FE% GD% : VA : ! ~~~~ [FeGd-95Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-95Liu.tdb): BCC_A2, type code %B, sha256 `5d743908ff00aa1f…` ~~~~text 44: PHASE BCC_A2 %B 2 1 3 ! 45: CONST BCC_A2 : FE% GD% : VA : ! ~~~~ Example references (5 of 5; assessments first): - [doi:10.1361/105497100770339923](https://doi.org/10.1361/105497100770339923) M. Zinkevich, N. Mattern, H. J. Seifert, Reassessment of the Fe-Gd (Iron-Gadolinum) system, JPE 21, 385-394 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0925-8388(95)01578-7](https://doi.org/10.1016/0925-8388%2895%2901578-7) Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). _assessment that models this phase; cited as the source of values for this phase; reports values for this phase_ - [doi:10.1034/j.1600-0692.2002.311310106.x](https://doi.org/10.1034/j.1600-0692.2002.311310106.x) Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2017.07.005](https://doi.org/10.1016/j.calphad.2017.07.005) X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 58, 151-59(2017). _assessment that models this phase_ - [doi:10.1016/S1002-0721(12)60178-1](https://doi.org/10.1016/S1002-0721%2812%2960178-1) W. Wang, C. Guo, C. Li, Z. Du, J. Rare Earths, 30, 1055-63(2012). _assessment that models this phase_ ## FCC_A1 (Fe–Gd) - Id: `phase:fe-gd:fcc-a1`; status `assigned` - Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high - Stability: stable in 6 of 6 calculated diagram(s): 1159.86–1667.47 K, x(Gd) 0–0.01105 - Literature: 30 values (30 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:fe-gd:fcc-a1) Names (10): _corpus: _corpus:phase:fe-gd:fcc-a1 _paper: _paper:10.1016/0925-8388(95)01578-7:f.c.c., paper:10.1034/j.1600-0692.2002.311310106.x:γFe, paper:10.1361/105497100770339923:γFe _tdb: _tdb:FeGd-00Zin.tdb:FCC_A1, tdb:FeGd-02Zin-newGd.tdb:FCC_A1, tdb:FeGd-02Zin.tdb:FCC_A1, tdb:FeGd-12Wan.tdb:FCC_A1, tdb:FeGd-17Che.tdb:FCC_A1, tdb:FeGd-95Liu.tdb:FCC_A1 ### TDB models of FCC_A1 (6): PHASE and CONSTITUENT statements as written [FeGd-00Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-00Zin.tdb): FCC_A1, type code %A, sha256 `c29d3c3fbef2ea49…` ~~~~text 37: PHASE FCC_A1 %A 2 1 1 ! 38: CONST FCC_A1 : FE% GD : VA : ! ~~~~ [FeGd-02Zin-newGd.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin-newGd.tdb): FCC_A1, type code %A, sha256 `f16780fed3b16558…` ~~~~text 44: PHASE FCC_A1 %A 2 1 1 ! 45: CONST FCC_A1 : FE% GD : VA : ! ~~~~ [FeGd-02Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin.tdb): FCC_A1, type code %A, sha256 `ccf919e5867bc088…` ~~~~text 44: PHASE FCC_A1 %A 2 1 1 ! 45: CONST FCC_A1 : FE% GD : VA : ! ~~~~ [FeGd-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-12Wan.tdb): FCC_A1, type code %A, sha256 `f83f09ebff484a46…` ~~~~text 39: PHASE FCC_A1 %A 2 1 1 ! 40: CONST FCC_A1 : FE% GD : VA : ! ~~~~ [FeGd-17Che.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-17Che.tdb): FCC_A1, type code %A, sha256 `6eae73757a5ee767…` ~~~~text 40: PHASE FCC_A1 %A 2 1 1 ! 41: CONST FCC_A1 : FE% GD : VA : ! ~~~~ [FeGd-95Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-95Liu.tdb): FCC_A1, type code %A, sha256 `5d743908ff00aa1f…` ~~~~text 39: PHASE FCC_A1 %A 2 1 1 ! 40: CONST FCC_A1 : FE% GD : VA : ! ~~~~ Example references (5 of 5; assessments first): - [doi:10.1016/0925-8388(95)01578-7](https://doi.org/10.1016/0925-8388%2895%2901578-7) Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). _assessment that models this phase; cited as the source of values for this phase; reports values for this phase_ - [doi:10.1034/j.1600-0692.2002.311310106.x](https://doi.org/10.1034/j.1600-0692.2002.311310106.x) Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002). _assessment that models this phase; reports values for this phase_ - [doi:10.1361/105497100770339923](https://doi.org/10.1361/105497100770339923) M. Zinkevich, N. Mattern, H. J. Seifert, Reassessment of the Fe-Gd (Iron-Gadolinum) system, JPE 21, 385-394 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2017.07.005](https://doi.org/10.1016/j.calphad.2017.07.005) X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 58, 151-59(2017). _assessment that models this phase_ - [doi:10.1016/S1002-0721(12)60178-1](https://doi.org/10.1016/S1002-0721%2812%2960178-1) W. Wang, C. Guo, C. Li, Z. Du, J. Rare Earths, 30, 1055-63(2012). _assessment that models this phase_ ## FE17GD2 (Fe–Gd) - Id: `phase:fe-gd:fe17gd2`; status `needs_review` - No structure assigned. Why: no_structure_token; off_stoichiometric_model; sgte_mmc2_rows_disagree - Candidate (literature_printed): Ni17Th2 · hP38 — printed with a label mapped to this phase - Candidate (sgte_mmc2): Ni17Th2 · hP38 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for FE17GD2: Fe17Gd2 (high T), see also Th2Zn17 - Candidate (sgte_mmc2): Th2Zn17 · hR19 · R-3m (166) — Hallstedt 2025 mmc2 row for FE17GD2: Fe17Gd2 (low T), see also Ni17Th2 - Candidate (tdb_comment): Th2Zn17 · hR19 · R-3m — FeGd-12Wan.tdb: 'Prototype Th2Zn17 (hR19, R-3m); low T, Ni17Th2 (hP38, P6_3/mmc); high T' - Candidate (tdb_comment): Th2Zn17 · hR19 · R-3m — FeGd-95Liu.tdb: 'Prototype Th2Zn17 (hR19, R-3m); low T, Ni17Th2 (hP38, P6_3/mmc); high T' - Stability: stable in 2 of 2 calculated diagram(s): 300–1603.94 K, x(Gd) 0.10526–0.10526 - Literature: 10 values (10 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:fe-gd:fe17gd2) Names (5): _corpus: _corpus:phase:fe-gd:fe17gd2 _paper: _paper:10.1016/0925-8388(95)01578-7:Fe17Gd2, paper:10.1361/105497100770339923:Fe17Gd2 _tdb: _tdb:FeGd-12Wan.tdb:FE17GD2, tdb:FeGd-95Liu.tdb:FE17GD2 ### TDB models of FE17GD2 (2): PHASE and CONSTITUENT statements as written [FeGd-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-12Wan.tdb): FE17GD2, type code %A, sha256 `f83f09ebff484a46…` ~~~~text 54: PHASE FE17GD2 %A 3 1 2 15 ! 55: CONST FE17GD2 : FE2 GD : GD : FE : ! ~~~~ [FeGd-95Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-95Liu.tdb): FE17GD2, type code %A, sha256 `5d743908ff00aa1f…` ~~~~text 54: PHASE FE17GD2 %A 2 17 2 ! 55: CONST FE17GD2 : FE : GD : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/0925-8388(95)01578-7](https://doi.org/10.1016/0925-8388%2895%2901578-7) Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/S1002-0721(12)60178-1](https://doi.org/10.1016/S1002-0721%2812%2960178-1) W. Wang, C. Guo, C. Li, Z. Du, J. Rare Earths, 30, 1055-63(2012). _assessment that models this phase_ - [doi:10.1007/bf02646931](https://doi.org/10.1007/bf02646931) C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-(Fe, Co, Pd, Pt) systems, Metall Trans A 18, 903-907 (1987). _cited as the source of values for this phase_ - [doi:10.1361/105497100770339923](https://doi.org/10.1361/105497100770339923) M. Zinkevich, N. Mattern, H. J. Seifert, Reassessment of the Fe-Gd (Iron-Gadolinum) system, JPE 21, 385-394 (2000). _reports values for this phase_ ## FE17GD2_HT (Fe–Gd) - Id: `phase:fe-gd:fe17gd2-ht`; status `assigned` - Structure: Ni17Th2 · hP38 · P6_3/mmc (194); type `st:ni17th2-hp38`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated - Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833) - Caveat: not certain from the name or DFT alone (no_structure_token, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Fe 0.8947, Gd 0.1053 - Stability: stable in 4 of 4 calculated diagram(s): 1482.48–1608.6 K, x(Gd) 0.10526–0.10526 - Literature: 18 values (18 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:fe-gd:fe17gd2-ht) Names (8): _corpus: _corpus:phase:fe-gd:fe17gd2-ht _paper: _paper:10.1034/j.1600-0692.2002.311310106.x:Fe17Gd2(H), paper:10.1361/105497100770339923:Fe17Gd2, paper:10.1361/105497100770339923:Fe17Gd2 (h) _tdb: _tdb:FeGd-00Zin.tdb:FE17GD2_HT, tdb:FeGd-02Zin-newGd.tdb:FE17GD2_HT, tdb:FeGd-02Zin.tdb:FE17GD2_HT, tdb:FeGd-17Che.tdb:FE17GD2_HT ### TDB models of FE17GD2_HT (4): PHASE and CONSTITUENT statements as written [FeGd-00Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-00Zin.tdb): FE17GD2_HT, type code %A, sha256 `c29d3c3fbef2ea49…` ~~~~text 57: PHASE FE17GD2_HT %A 2 17 2 ! 58: CONST FE17GD2_HT : FE : GD : ! ~~~~ [FeGd-02Zin-newGd.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin-newGd.tdb): FE17GD2_HT, type code %, sha256 `f16780fed3b16558…` ~~~~text 64: PHASE FE17GD2_HT % 2 17 2 ! 65: CONST FE17GD2_HT : FE : GD : ! ~~~~ [FeGd-02Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin.tdb): FE17GD2_HT, type code %, sha256 `ccf919e5867bc088…` ~~~~text 64: PHASE FE17GD2_HT % 2 17 2 ! 65: CONST FE17GD2_HT : FE : GD : ! ~~~~ [FeGd-17Che.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-17Che.tdb): FE17GD2_HT, type code %, sha256 `6eae73757a5ee767…` ~~~~text 60: PHASE FE17GD2_HT % 2 17 2 ! 61: CONST FE17GD2_HT : FE : GD : ! ~~~~ Example references (5 of 5; assessments first): - [doi:10.1034/j.1600-0692.2002.311310106.x](https://doi.org/10.1034/j.1600-0692.2002.311310106.x) Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002). _assessment that models this phase; reports values for this phase_ - [doi:10.1361/105497100770339923](https://doi.org/10.1361/105497100770339923) M. Zinkevich, N. Mattern, H. J. Seifert, Reassessment of the Fe-Gd (Iron-Gadolinum) system, JPE 21, 385-394 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2017.07.005](https://doi.org/10.1016/j.calphad.2017.07.005) X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 58, 151-59(2017). _assessment that models this phase_ - [doi:10.1016/0925-8388(95)01578-7](https://doi.org/10.1016/0925-8388%2895%2901578-7) Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). _cited as the source of values for this phase_ - [doi:10.1179/mst.1990.6.8.778](https://doi.org/10.1179/mst.1990.6.8.778) S. Atiq, R. D. Rawlings, D. R. F. West, Crystal structure of compounds Fe\17\Gd\2\and Fe\17\Tb\2\, Materials Science and Technology 6, 778-780 (1990). _cited as the source of values for this phase_ ## FE17GD2_LT (Fe–Gd) - Id: `phase:fe-gd:fe17gd2-lt`; status `assigned` - Structure: Th2Zn17 · hR19 · R-3m (166); type `st:th2zn17-hr19`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated - Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833) - Caveat: not certain from the name or DFT alone (no_structure_token, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Fe 0.8947, Gd 0.1053 - Stability: stable in 4 of 4 calculated diagram(s): 300–1488.35 K, x(Gd) 0.10526–0.10526 - Literature: 6 values (6 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:fe-gd:fe17gd2-lt) Names (7): _corpus: _corpus:phase:fe-gd:fe17gd2-lt _paper: _paper:10.1034/j.1600-0692.2002.311310106.x:Fe17Gd2(R), paper:10.1361/105497100770339923:Fe17Gd2 (r) _tdb: _tdb:FeGd-00Zin.tdb:FE17GD2_LT, tdb:FeGd-02Zin-newGd.tdb:FE17GD2_LT, tdb:FeGd-02Zin.tdb:FE17GD2_LT, tdb:FeGd-17Che.tdb:FE17GD2_LT ### TDB models of FE17GD2_LT (4): PHASE and CONSTITUENT statements as written [FeGd-00Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-00Zin.tdb): FE17GD2_LT, type code %A, sha256 `c29d3c3fbef2ea49…` ~~~~text 52: PHASE FE17GD2_LT %A 2 17 2 ! 53: CONST FE17GD2_LT : FE : GD : ! ~~~~ [FeGd-02Zin-newGd.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin-newGd.tdb): FE17GD2_LT, type code %A, sha256 `f16780fed3b16558…` ~~~~text 59: PHASE FE17GD2_LT %A 2 17 2 ! 60: CONST FE17GD2_LT : FE : GD : ! ~~~~ [FeGd-02Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin.tdb): FE17GD2_LT, type code %A, sha256 `ccf919e5867bc088…` ~~~~text 59: PHASE FE17GD2_LT %A 2 17 2 ! 60: CONST FE17GD2_LT : FE : GD : ! ~~~~ [FeGd-17Che.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-17Che.tdb): FE17GD2_LT, type code %A, sha256 `6eae73757a5ee767…` ~~~~text 55: PHASE FE17GD2_LT %A 2 17 2 ! 56: CONST FE17GD2_LT : FE : GD : ! ~~~~ Example references (5 of 5; assessments first): - [doi:10.1034/j.1600-0692.2002.311310106.x](https://doi.org/10.1034/j.1600-0692.2002.311310106.x) Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002). _assessment that models this phase; reports values for this phase_ - [doi:10.1361/105497100770339923](https://doi.org/10.1361/105497100770339923) M. Zinkevich, N. Mattern, H. J. Seifert, Reassessment of the Fe-Gd (Iron-Gadolinum) system, JPE 21, 385-394 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2017.07.005](https://doi.org/10.1016/j.calphad.2017.07.005) X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 58, 151-59(2017). _assessment that models this phase_ - [doi:10.1016/0925-8388(95)01578-7](https://doi.org/10.1016/0925-8388%2895%2901578-7) Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). _cited as the source of values for this phase_ - [doi:10.1179/mst.1990.6.8.778](https://doi.org/10.1179/mst.1990.6.8.778) S. Atiq, R. D. Rawlings, D. R. F. West, Crystal structure of compounds Fe\17\Gd\2\and Fe\17\Tb\2\, Materials Science and Technology 6, 778-780 (1990). _cited as the source of values for this phase_ ## FE23GD6 (Fe–Gd) - Id: `phase:fe-gd:fe23gd6`; status `needs_review` - No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition - Candidate (tdb_comment): Mn23Th6 · cF116 · Fm-3m — FeGd-02Zin-newGd.tdb: 'Prototype Mn23Th6 (cF116, Fm-3m)' - Stoichiometry: Fe 0.7931, Gd 0.2069 - Stability: stable in 1 of 1 calculated diagram(s): 300–1551.48 K, x(Gd) 0.2069–0.2069 - Literature: 11 values (11 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:fe-gd:fe23gd6) Names (3): _corpus: _corpus:phase:fe-gd:fe23gd6 _paper: _paper:10.1034/j.1600-0692.2002.311310106.x:Fe23Gd6 _tdb: _tdb:FeGd-02Zin-newGd.tdb:FE23GD6 ### TDB models of FE23GD6 (1): PHASE and CONSTITUENT statements as written [FeGd-02Zin-newGd.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin-newGd.tdb): FE23GD6, type code %A, sha256 `f16780fed3b16558…` ~~~~text 69: PHASE FE23GD6 %A 2 23 6 ! 70: CONST FE23GD6 : FE : GD : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1034/j.1600-0692.2002.311310106.x](https://doi.org/10.1034/j.1600-0692.2002.311310106.x) Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0925-8388(95)01578-7](https://doi.org/10.1016/0925-8388%2895%2901578-7) Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). _cited as the source of values for this phase_ ## FE23GD6_D8A (Fe–Gd) - Id: `phase:fe-gd:fe23gd6-d8a`; status `assigned` - Structure: Mn23Th6 · D8_a · cF116 · Fm-3m (225); type `st:d8-a-mn23th6-cf116`; tier A: standard phase name; confidence high - Stoichiometry: Fe 0.7931, Gd 0.2069 - Stability: stable in 5 of 5 calculated diagram(s): 300–1556.2 K, x(Gd) 0.2069–0.2069 - Literature: 9 values (9 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:fe-gd:fe23gd6-d8a) Names (8): _corpus: _corpus:phase:fe-gd:fe23gd6-d8a _paper: _paper:10.1016/0925-8388(95)01578-7:Fe23Gd6, paper:10.1361/105497100770339923:Fe23Gd6 _tdb: _tdb:FeGd-00Zin.tdb:FE23GD6_D8A, tdb:FeGd-02Zin.tdb:FE23GD6_D8A, tdb:FeGd-12Wan.tdb:FE23GD6_D8A, tdb:FeGd-17Che.tdb:FE23GD6_D8A, tdb:FeGd-95Liu.tdb:FE23GD6_D8A ### TDB models of FE23GD6_D8A (5): PHASE and CONSTITUENT statements as written [FeGd-00Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-00Zin.tdb): FE23GD6_D8A, type code %A, sha256 `c29d3c3fbef2ea49…` ~~~~text 62: PHASE FE23GD6_D8A %A 2 23 6 ! 63: CONST FE23GD6_D8A : FE : GD : ! ~~~~ [FeGd-02Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin.tdb): FE23GD6_D8A, type code %A, sha256 `ccf919e5867bc088…` ~~~~text 69: PHASE FE23GD6_D8A %A 2 23 6 ! 70: CONST FE23GD6_D8A : FE : GD : ! ~~~~ [FeGd-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-12Wan.tdb): FE23GD6_D8A, type code %A, sha256 `f83f09ebff484a46…` ~~~~text 59: PHASE FE23GD6_D8A %A 2 23 6 ! 60: CONST FE23GD6_D8A : FE : GD : ! ~~~~ [FeGd-17Che.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-17Che.tdb): FE23GD6_D8A, type code %A, sha256 `6eae73757a5ee767…` ~~~~text 65: PHASE FE23GD6_D8A %A 2 23 6 ! 66: CONST FE23GD6_D8A : FE : GD : ! ~~~~ [FeGd-95Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-95Liu.tdb): FE23GD6_D8A, type code %A, sha256 `5d743908ff00aa1f…` ~~~~text 59: PHASE FE23GD6_D8A %A 2 23 6 ! 60: CONST FE23GD6_D8A : FE : GD : ! ~~~~ Example references (5 of 5; assessments first): - [doi:10.1016/0925-8388(95)01578-7](https://doi.org/10.1016/0925-8388%2895%2901578-7) Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). _assessment that models this phase; reports values for this phase_ - [doi:10.1361/105497100770339923](https://doi.org/10.1361/105497100770339923) M. Zinkevich, N. Mattern, H. J. Seifert, Reassessment of the Fe-Gd (Iron-Gadolinum) system, JPE 21, 385-394 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2017.07.005](https://doi.org/10.1016/j.calphad.2017.07.005) X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 58, 151-59(2017). _assessment that models this phase_ - [doi:10.1016/S1002-0721(12)60178-1](https://doi.org/10.1016/S1002-0721%2812%2960178-1) W. Wang, C. Guo, C. Li, Z. Du, J. Rare Earths, 30, 1055-63(2012). _assessment that models this phase_ - [doi:10.1034/j.1600-0692.2002.311310106.x](https://doi.org/10.1034/j.1600-0692.2002.311310106.x) Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002). _assessment that models this phase_ ## FE2GD_C15 (Fe–Gd) - Id: `phase:fe-gd:fe2gd-c15`; status `assigned` - Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type `st:c15-cu2mg-cf24`; tier A: standard phase name; confidence high - Stoichiometry: Fe 0.6667, Gd 0.3333 - Stability: stable in 6 of 6 calculated diagram(s): 300–1470.3 K, x(Gd) 0.33333–0.33333 - Literature: 27 values (27 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:fe-gd:fe2gd-c15) Names (10): _corpus: _corpus:phase:fe-gd:fe2gd-c15 _paper: _paper:10.1016/0925-8388(95)01578-7:Fe2Gd, paper:10.1034/j.1600-0692.2002.311310106.x:Fe2Gd, paper:10.1361/105497100770339923:Fe2Gd _tdb: _tdb:FeGd-00Zin.tdb:FE2GD_C15, tdb:FeGd-02Zin-newGd.tdb:FE2GD_C15, tdb:FeGd-02Zin.tdb:FE2GD_C15, tdb:FeGd-12Wan.tdb:FE2GD_C15, tdb:FeGd-17Che.tdb:FE2GD_C15, tdb:FeGd-95Liu.tdb:FE2GD_C15 ### TDB models of FE2GD_C15 (6): PHASE and CONSTITUENT statements as written [FeGd-00Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-00Zin.tdb): FE2GD_C15, type code %A, sha256 `c29d3c3fbef2ea49…` ~~~~text 72: PHASE FE2GD_C15 %A 2 2 1 ! 73: CONST FE2GD_C15 : FE : GD : ! ~~~~ [FeGd-02Zin-newGd.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin-newGd.tdb): FE2GD_C15, type code %A, sha256 `f16780fed3b16558…` ~~~~text 79: PHASE FE2GD_C15 %A 2 2 1 ! 80: CONST FE2GD_C15 : FE : GD : ! ~~~~ [FeGd-02Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin.tdb): FE2GD_C15, type code %A, sha256 `ccf919e5867bc088…` ~~~~text 79: PHASE FE2GD_C15 %A 2 2 1 ! 80: CONST FE2GD_C15 : FE : GD : ! ~~~~ [FeGd-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-12Wan.tdb): FE2GD_C15, type code %A, sha256 `f83f09ebff484a46…` ~~~~text 69: PHASE FE2GD_C15 %A 2 2 1 ! 70: CONST FE2GD_C15 : FE : GD : ! ~~~~ [FeGd-17Che.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-17Che.tdb): FE2GD_C15, type code %A, sha256 `6eae73757a5ee767…` ~~~~text 75: PHASE FE2GD_C15 %A 2 2 1 ! 76: CONST FE2GD_C15 : FE : GD : ! ~~~~ [FeGd-95Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-95Liu.tdb): FE2GD_C15, type code %A, sha256 `5d743908ff00aa1f…` ~~~~text 69: PHASE FE2GD_C15 %A 2 2 1 ! 70: CONST FE2GD_C15 : FE : GD : ! ~~~~ Example references (7 of 7; assessments first): - [doi:10.1361/105497100770339923](https://doi.org/10.1361/105497100770339923) M. Zinkevich, N. Mattern, H. J. Seifert, Reassessment of the Fe-Gd (Iron-Gadolinum) system, JPE 21, 385-394 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0925-8388(95)01578-7](https://doi.org/10.1016/0925-8388%2895%2901578-7) Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). _assessment that models this phase; cited as the source of values for this phase; reports values for this phase_ - [doi:10.1034/j.1600-0692.2002.311310106.x](https://doi.org/10.1034/j.1600-0692.2002.311310106.x) Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2017.07.005](https://doi.org/10.1016/j.calphad.2017.07.005) X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 58, 151-59(2017). _assessment that models this phase_ - [doi:10.1016/S1002-0721(12)60178-1](https://doi.org/10.1016/S1002-0721%2812%2960178-1) W. Wang, C. Guo, C. Li, Z. Du, J. Rare Earths, 30, 1055-63(2012). _assessment that models this phase_ - [doi:10.1007/bf02646931](https://doi.org/10.1007/bf02646931) C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-(Fe, Co, Pd, Pt) systems, Metall Trans A 18, 903-907 (1987). _cited as the source of values for this phase_ - [doi:10.1016/0022-4596(81)90500-4](https://doi.org/10.1016/0022-4596%2881%2990500-4) D.J. Germano, R.A. Butera, K.A. Gschneidner, Heat capacity and thermodynamic functions of theRFe2 compounds (R =Gd, Tb, Dy, Ho, Er, Tm, Lu) over the temperature region 8 to 300 K, Journal of Solid State Chemistry 37, 383-389 (1981). _cited as the source of values for this phase_ ## FE3GD (Fe–Gd) - Id: `phase:fe-gd:fe3gd`; status `assigned` - Structure: Ni3Pu · hR12 · R-3m (166); type `st:ni3pu-hr12`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated - Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833) - Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Fe 0.7500, Gd 0.2500 - Stability: stable in 6 of 6 calculated diagram(s): 300–1433.33 K, x(Gd) 0.25–0.25 - Literature: 30 values (30 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:fe-gd:fe3gd) Names (10): _corpus: _corpus:phase:fe-gd:fe3gd _paper: _paper:10.1016/0925-8388(95)01578-7:Fe3Gd, paper:10.1034/j.1600-0692.2002.311310106.x:Fe3Gd, paper:10.1361/105497100770339923:Fe3Gd _tdb: _tdb:FeGd-00Zin.tdb:FE3GD, tdb:FeGd-02Zin-newGd.tdb:FE3GD, tdb:FeGd-02Zin.tdb:FE3GD, tdb:FeGd-12Wan.tdb:FE3GD, tdb:FeGd-17Che.tdb:FE3GD, tdb:FeGd-95Liu.tdb:FE3GD ### TDB models of FE3GD (6): PHASE and CONSTITUENT statements as written [FeGd-00Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-00Zin.tdb): FE3GD, type code %A, sha256 `c29d3c3fbef2ea49…` ~~~~text 67: PHASE FE3GD %A 2 3 1 ! 68: CONST FE3GD : FE : GD : ! ~~~~ [FeGd-02Zin-newGd.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin-newGd.tdb): FE3GD, type code %A, sha256 `f16780fed3b16558…` ~~~~text 74: PHASE FE3GD %A 2 3 1 ! 75: CONST FE3GD : FE : GD : ! ~~~~ [FeGd-02Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin.tdb): FE3GD, type code %A, sha256 `ccf919e5867bc088…` ~~~~text 74: PHASE FE3GD %A 2 3 1 ! 75: CONST FE3GD : FE : GD : ! ~~~~ [FeGd-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-12Wan.tdb): FE3GD, type code %A, sha256 `f83f09ebff484a46…` ~~~~text 64: PHASE FE3GD %A 2 3 1 ! 65: CONST FE3GD : FE : GD : ! ~~~~ [FeGd-17Che.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-17Che.tdb): FE3GD, type code %A, sha256 `6eae73757a5ee767…` ~~~~text 70: PHASE FE3GD %A 2 3 1 ! 71: CONST FE3GD : FE : GD : ! ~~~~ [FeGd-95Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-95Liu.tdb): FE3GD, type code %A, sha256 `5d743908ff00aa1f…` ~~~~text 64: PHASE FE3GD %A 2 3 1 ! 65: CONST FE3GD : FE : GD : ! ~~~~ Example references (6 of 6; assessments first): - [doi:10.1034/j.1600-0692.2002.311310106.x](https://doi.org/10.1034/j.1600-0692.2002.311310106.x) Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0925-8388(95)01578-7](https://doi.org/10.1016/0925-8388%2895%2901578-7) Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). _assessment that models this phase; cited as the source of values for this phase; reports values for this phase_ - [doi:10.1361/105497100770339923](https://doi.org/10.1361/105497100770339923) M. Zinkevich, N. Mattern, H. J. Seifert, Reassessment of the Fe-Gd (Iron-Gadolinum) system, JPE 21, 385-394 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2017.07.005](https://doi.org/10.1016/j.calphad.2017.07.005) X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 58, 151-59(2017). _assessment that models this phase_ - [doi:10.1016/S1002-0721(12)60178-1](https://doi.org/10.1016/S1002-0721%2812%2960178-1) W. Wang, C. Guo, C. Li, Z. Du, J. Rare Earths, 30, 1055-63(2012). _assessment that models this phase_ - [doi:10.1007/bf02646931](https://doi.org/10.1007/bf02646931) C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-(Fe, Co, Pd, Pt) systems, Metall Trans A 18, 903-907 (1987). _cited as the source of values for this phase_ ## HCP_A3 (Fe–Gd) - Id: `phase:fe-gd:hcp-a3`; status `assigned` - Structure: Mg · A3 · hP2 · P6_3/mmc (194); type `st:a3-mg-hp2`; tier A: standard phase name; confidence high - Stability: stable in 6 of 6 calculated diagram(s): 300–1583 K, x(Gd) 0.99025–1 - Literature: 17 values (17 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:fe-gd:hcp-a3) Names (10): _corpus: _corpus:phase:fe-gd:hcp-a3 _paper: _paper:10.1016/0925-8388(95)01578-7:h.c.p., paper:10.1034/j.1600-0692.2002.311310106.x:αGd, paper:10.1361/105497100770339923:αGd _tdb: _tdb:FeGd-00Zin.tdb:HCP_A3, tdb:FeGd-02Zin-newGd.tdb:HCP_A3, tdb:FeGd-02Zin.tdb:HCP_A3, tdb:FeGd-12Wan.tdb:HCP_A3, tdb:FeGd-17Che.tdb:HCP_A3, tdb:FeGd-95Liu.tdb:HCP_A3 ### TDB models of HCP_A3 (6): PHASE and CONSTITUENT statements as written [FeGd-00Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-00Zin.tdb): HCP_A3, type code %A, sha256 `c29d3c3fbef2ea49…` ~~~~text 47: PHASE HCP_A3 %A 2 1 0.5 ! 48: CONST HCP_A3 : FE GD% : VA : ! ~~~~ [FeGd-02Zin-newGd.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin-newGd.tdb): HCP_A3, type code %A, sha256 `f16780fed3b16558…` ~~~~text 54: PHASE HCP_A3 %A 2 1 0.5 ! 55: CONST HCP_A3 : FE GD% : VA : ! ~~~~ [FeGd-02Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin.tdb): HCP_A3, type code %A, sha256 `ccf919e5867bc088…` ~~~~text 54: PHASE HCP_A3 %A 2 1 0.5 ! 55: CONST HCP_A3 : FE GD% : VA : ! ~~~~ [FeGd-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-12Wan.tdb): HCP_A3, type code %A, sha256 `f83f09ebff484a46…` ~~~~text 49: PHASE HCP_A3 %A 2 1 0.5 ! 50: CONST HCP_A3 : FE GD% : VA : ! ~~~~ [FeGd-17Che.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-17Che.tdb): HCP_A3, type code %A, sha256 `6eae73757a5ee767…` ~~~~text 50: PHASE HCP_A3 %A 2 1 0.5 ! 51: CONST HCP_A3 : FE GD% : VA : ! ~~~~ [FeGd-95Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-95Liu.tdb): HCP_A3, type code %A, sha256 `5d743908ff00aa1f…` ~~~~text 49: PHASE HCP_A3 %A 2 1 0.5 ! 50: CONST HCP_A3 : FE GD% : VA : ! ~~~~ Example references (5 of 5; assessments first): - [doi:10.1034/j.1600-0692.2002.311310106.x](https://doi.org/10.1034/j.1600-0692.2002.311310106.x) Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0925-8388(95)01578-7](https://doi.org/10.1016/0925-8388%2895%2901578-7) Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). _assessment that models this phase; cited as the source of values for this phase; reports values for this phase_ - [doi:10.1361/105497100770339923](https://doi.org/10.1361/105497100770339923) M. Zinkevich, N. Mattern, H. J. Seifert, Reassessment of the Fe-Gd (Iron-Gadolinum) system, JPE 21, 385-394 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2017.07.005](https://doi.org/10.1016/j.calphad.2017.07.005) X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 58, 151-59(2017). _assessment that models this phase_ - [doi:10.1016/S1002-0721(12)60178-1](https://doi.org/10.1016/S1002-0721%2812%2960178-1) W. Wang, C. Guo, C. Li, Z. Du, J. Rare Earths, 30, 1055-63(2012). _assessment that models this phase_ ## LIQUID (Fe–Gd) - Id: `phase:fe-gd:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 6 of 6 calculated diagram(s): 1087.34–2500 K, x(Gd) 0–1 - Literature: 79 values (79 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:fe-gd:liquid) Names (10): _corpus: _corpus:phase:fe-gd:liquid _paper: _paper:10.1016/0925-8388(95)01578-7:L, paper:10.1034/j.1600-0692.2002.311310106.x:liquid, paper:10.1361/105497100770339923:Liquid _tdb: _tdb:FeGd-00Zin.tdb:LIQUID, tdb:FeGd-02Zin-newGd.tdb:LIQUID, tdb:FeGd-02Zin.tdb:LIQUID, tdb:FeGd-12Wan.tdb:LIQUID, tdb:FeGd-17Che.tdb:LIQUID, tdb:FeGd-95Liu.tdb:LIQUID ### TDB models of LIQUID (6): PHASE and CONSTITUENT statements as written [FeGd-00Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-00Zin.tdb): LIQUID, type code %, sha256 `c29d3c3fbef2ea49…` ~~~~text 32: PHASE LIQUID:L % 1 1 ! 33: CONST LIQUID:L : FE GD : ! ~~~~ [FeGd-02Zin-newGd.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin-newGd.tdb): LIQUID, type code %, sha256 `f16780fed3b16558…` ~~~~text 39: PHASE LIQUID:L % 1 1 ! 40: CONST LIQUID:L : FE GD : ! ~~~~ [FeGd-02Zin.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-02Zin.tdb): LIQUID, type code %, sha256 `ccf919e5867bc088…` ~~~~text 39: PHASE LIQUID:L % 1 1 ! 40: CONST LIQUID:L : FE GD : ! ~~~~ [FeGd-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-12Wan.tdb): LIQUID, type code %, sha256 `f83f09ebff484a46…` ~~~~text 34: PHASE LIQUID:L % 1 1 ! 35: CONST LIQUID:L : FE GD : ! ~~~~ [FeGd-17Che.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-17Che.tdb): LIQUID, type code %, sha256 `6eae73757a5ee767…` ~~~~text 35: PHASE LIQUID:L % 1 1 ! 36: CONST LIQUID:L : FE GD : ! ~~~~ [FeGd-95Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/FeGd-95Liu.tdb): LIQUID, type code %, sha256 `5d743908ff00aa1f…` ~~~~text 34: PHASE LIQUID:L % 1 1 ! 35: CONST LIQUID:L : FE GD : ! ~~~~ Example references (5 of 5; assessments first): - [doi:10.1361/105497100770339923](https://doi.org/10.1361/105497100770339923) M. Zinkevich, N. Mattern, H. J. Seifert, Reassessment of the Fe-Gd (Iron-Gadolinum) system, JPE 21, 385-394 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0925-8388(95)01578-7](https://doi.org/10.1016/0925-8388%2895%2901578-7) Zi-Kui Liu, Weijing Zhang, Bo Sundman, Thermodynamic assessment of the CoFeGd systems, Journal of Alloys and Compounds 226, 33-45 (1995). _assessment that models this phase; cited as the source of values for this phase; reports values for this phase_ - [doi:10.1034/j.1600-0692.2002.311310106.x](https://doi.org/10.1034/j.1600-0692.2002.311310106.x) Matvei Zinkevich, Norbert Mattern, Hans‐Jürgen Seifert, Eberhard Gmelin, A thermodynamic assessment of the Fe‐Gd‐Mo system, Scand Jof Metallurgy 31, 34-51 (2002). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2017.07.005](https://doi.org/10.1016/j.calphad.2017.07.005) X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou, Calphad, 58, 151-59(2017). _assessment that models this phase_ - [doi:10.1016/S1002-0721(12)60178-1](https://doi.org/10.1016/S1002-0721%2812%2960178-1) W. Wang, C. Guo, C. Li, Z. Du, J. Rare Earths, 30, 1055-63(2012). _assessment that models this phase_ ## Please cite - R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735970 - 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 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); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). 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_phase_registry_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID-Registry: phase registry of binary systems}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23735970}, url = {https://doi.org/10.5281/zenodo.23735970}, note = {Version 1, machine-extracted} } @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 the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).