# Gd–Zn phases > Gd–Zn system: 12 phases (tier A 5, tier C 5, liquid 1, needs_review 1); 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/GD-ZN.html · Markdown: https://data.orchid-project.org/phases/pages/GD-ZN.md 12 phases (tier A 5, tier C 5, liquid 1, needs_review 1); 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=GD-ZN) · [full JSON](https://data.orchid-project.org/phases/systems/GD-ZN.json) · [Gd–Zn system page](https://data.orchid-project.org/systems/GD-ZN.html) · [Markdown](https://data.orchid-project.org/phases/pages/GD-ZN.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Gd–Zn system (12) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BCC_A2](#phase-gd-zn-bcc-a2); _phase:gd-zn:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1508.12–1631.87 K, x(Zn) 0–8e-05 | 0 | 1 | | [FCC_A1](#phase-gd-zn-fcc-a1); _phase:gd-zn:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 | | [GD13ZN58](#phase-gd-zn-gd13zn58); _phase:gd-zn:gd13zn58_ | Gd13Zn58 · hP142 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1183.61 K, x(Zn) 0.8169–0.8169 | 6 | 1 | | [GD2ZN17](#phase-gd-zn-gd2zn17); _phase:gd-zn:gd2zn17_ | | needs_review | stable in 1 of 1 calculated diagram(s): 300–1204.42 K, x(Zn) 0.89474–0.89474 | 6 | 1 | | [GD3ZN11](#phase-gd-zn-gd3zn11); _phase:gd-zn:gd3zn11_ | Al11La3 · oI28 · Immm (71) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1166.38 K, x(Zn) 0.78571–0.78571 | 4 | 1 | | [GD3ZN22](#phase-gd-zn-gd3zn22); _phase:gd-zn:gd3zn22_ | Ce3Zn22 · tI100 · I4_1/amd (141) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1178.54 K, x(Zn) 0.88–0.88 | 4 | 1 | | [GDZN_B2](#phase-gd-zn-gdzn-b2); _phase:gd-zn:gdzn-b2_ | CsCl · B2 · cP2 · Pm-3m (221) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1291.33 K, x(Zn) 0.5–0.5 | 6 | 1 | | [GDZN12_D2B](#phase-gd-zn-gdzn12-d2b); _phase:gd-zn:gdzn12-d2b_ | Mn12Th · D2_b · tI26 · I4/mmm (139) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–932.14 K, x(Zn) 0.92308–0.92308 | 4 | 1 | | [GDZN2](#phase-gd-zn-gdzn2); _phase:gd-zn:gdzn2_ | Hg2K · oI12 · Imma (74) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1281.99 K, x(Zn) 0.66667–0.66667 | 6 | 1 | | [GDZN3](#phase-gd-zn-gdzn3); _phase:gd-zn:gdzn3_ | YZn3 · oP16 · Pnma (62) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1175.08 K, x(Zn) 0.75–0.75 | 4 | 1 | | [HCP_A3](#phase-gd-zn-hcp-a3); _phase:gd-zn:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2498.92 K, x(Zn) 0–1 | 4 | 1 | | [LIQUID](#phase-gd-zn-liquid); _phase:gd-zn:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 692.67–2500 K, x(Zn) 0–1 | 26 | 1 | ## BCC_A2 (Gd–Zn) - Id: `phase:gd-zn: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 1 of 1 calculated diagram(s): 1508.12–1631.87 K, x(Zn) 0–8e-05 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:bcc-a2) Names (2): _corpus: _corpus:phase:gd-zn:bcc-a2 _tdb: _tdb:GdZn-15Gro.tdb:BCC_A2 ### TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): BCC_A2, type code %B, sha256 `9f155d2a3829e5b7…` ~~~~text 34: PHASE BCC_A2 %B 2 1 3 ! 35: CONST BCC_A2 : GD% ZN : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase_ ## FCC_A1 (Gd–Zn) - Id: `phase:gd-zn:fcc-a1`; status `assigned` - Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high - Stability: not stable in 1 calculated diagram(s) - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:fcc-a1) Names (2): _corpus: _corpus:phase:gd-zn:fcc-a1 _tdb: _tdb:GdZn-15Gro.tdb:FCC_A1 ### TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): FCC_A1, type code %A, sha256 `9f155d2a3829e5b7…` ~~~~text 29: PHASE FCC_A1 %A 2 1 1 ! 30: CONST FCC_A1 : GD ZN : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase_ ## GD13ZN58 (Gd–Zn) - Id: `phase:gd-zn:gd13zn58`; status `assigned` - Structure: Gd13Zn58 · hP142 · P6_3/mmc (194); type `st:gd13zn58-hp142`; 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_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Gd 0.1831, Zn 0.8169 - Stability: stable in 1 of 1 calculated diagram(s): 300–1183.61 K, x(Zn) 0.8169–0.8169 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:gd13zn58) Names (3): _corpus: _corpus:phase:gd-zn:gd13zn58 _paper: _paper:10.1016/j.actamat.2015.02.044:Gd13Zn58 _tdb: _tdb:GdZn-15Gro.tdb:GD13ZN58 ### TDB models of GD13ZN58 (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): GD13ZN58, type code %, sha256 `9f155d2a3829e5b7…` ~~~~text 64: PHASE GD13ZN58 % 2 13 58 ! 65: CONST GD13ZN58 : GD : ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(70)90074-3](https://doi.org/10.1016/0022-5088%2870%2990074-3) G. Bruzzone, M.L. Fornasini, F. Merlo, Rare-earth intermediate phases with zinc, Journal of the Less Common Metals 22, 253-264 (1970). _cited as the source of values for this phase_ ## GD2ZN17 (Gd–Zn) - Id: `phase:gd-zn:gd2zn17`; status `needs_review` - No structure assigned. Why: no_structure_token; sgte_mmc2_row_disagrees_with_dft; sgte_mmc2_rows_disagree - Candidate (dft_mp): R-3m (166) — on-hull MP Gd2Zn17 at x(ZN)=0.8947 - Candidate (dft_oqmd): R-3m (166) — on-hull OQMD Gd2 Zn17 at x(ZN)=0.8947 - 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 GD2ZN17: Gd2Zn17 (low T), see also Th2Zn17 - Candidate (sgte_mmc2): Th2Zn17 · hR19 · R-3m (166) — Hallstedt 2025 mmc2 row for GD2ZN17: Gd2Zn17 (high T), see also Ni17Th2 - Candidate (tdb_comment): Ni17Th2 · hP38 · P6_3/mmc — GdZn-15Gro.tdb: 'Prototype Ni17Th2 (hP38, P6_3/mmc) low T and Th2Zn17 (hR19, R-3m) high T' - Stoichiometry: Gd 0.1053, Zn 0.8947 - Stability: stable in 1 of 1 calculated diagram(s): 300–1204.42 K, x(Zn) 0.89474–0.89474 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:gd2zn17) Names (3): _corpus: _corpus:phase:gd-zn:gd2zn17 _paper: _paper:10.1016/j.actamat.2015.02.044:Gd2Zn17 _tdb: _tdb:GdZn-15Gro.tdb:GD2ZN17 ### TDB models of GD2ZN17 (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): GD2ZN17, type code %, sha256 `9f155d2a3829e5b7…` ~~~~text 74: PHASE GD2ZN17 % 2 2 17 ! 75: CONST GD2ZN17 : GD : ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(70)90074-3](https://doi.org/10.1016/0022-5088%2870%2990074-3) G. Bruzzone, M.L. Fornasini, F. Merlo, Rare-earth intermediate phases with zinc, Journal of the Less Common Metals 22, 253-264 (1970). _cited as the source of values for this phase_ ## GD3ZN11 (Gd–Zn) - Id: `phase:gd-zn:gd3zn11`; status `assigned` - Structure: Al11La3 · oI28 · Immm (71); type `st:al11la3-oi28`; 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: Gd 0.2143, Zn 0.7857 - Stability: stable in 1 of 1 calculated diagram(s): 300–1166.38 K, x(Zn) 0.78571–0.78571 - Literature: 4 values (4 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:gd3zn11) Names (3): _corpus: _corpus:phase:gd-zn:gd3zn11 _paper: _paper:10.1016/j.actamat.2015.02.044:Gd3Zn11 _tdb: _tdb:GdZn-15Gro.tdb:GD3ZN11 ### TDB models of GD3ZN11 (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): GD3ZN11, type code %, sha256 `9f155d2a3829e5b7…` ~~~~text 59: PHASE GD3ZN11 % 2 3 11 ! 60: CONST GD3ZN11 : GD : ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(70)90074-3](https://doi.org/10.1016/0022-5088%2870%2990074-3) G. Bruzzone, M.L. Fornasini, F. Merlo, Rare-earth intermediate phases with zinc, Journal of the Less Common Metals 22, 253-264 (1970). _cited as the source of values for this phase_ ## GD3ZN22 (Gd–Zn) - Id: `phase:gd-zn:gd3zn22`; status `assigned` - Structure: Ce3Zn22 · tI100 · I4_1/amd (141); type `st:ce3zn22-ti100`; 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: Gd 0.1200, Zn 0.8800 - Stability: stable in 1 of 1 calculated diagram(s): 300–1178.54 K, x(Zn) 0.88–0.88 - Literature: 4 values (4 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:gd3zn22) Names (3): _corpus: _corpus:phase:gd-zn:gd3zn22 _paper: _paper:10.1016/j.actamat.2015.02.044:Gd3Zn22 _tdb: _tdb:GdZn-15Gro.tdb:GD3ZN22 ### TDB models of GD3ZN22 (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): GD3ZN22, type code %, sha256 `9f155d2a3829e5b7…` ~~~~text 69: PHASE GD3ZN22 % 2 3 22 ! 70: CONST GD3ZN22 : GD : ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(70)90074-3](https://doi.org/10.1016/0022-5088%2870%2990074-3) G. Bruzzone, M.L. Fornasini, F. Merlo, Rare-earth intermediate phases with zinc, Journal of the Less Common Metals 22, 253-264 (1970). _cited as the source of values for this phase_ ## GDZN_B2 (Gd–Zn) - Id: `phase:gd-zn:gdzn-b2`; status `assigned` - Structure: CsCl · B2 · cP2 · Pm-3m (221); type `st:b2-cscl-cp2`; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaaaadsb and oqmd-89768, space group 221 - Stoichiometry: Gd 0.5000, Zn 0.5000 - Stability: stable in 1 of 1 calculated diagram(s): 300–1291.33 K, x(Zn) 0.5–0.5 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:gdzn-b2) Names (5): _corpus: _corpus:phase:gd-zn:gdzn-b2 _mp: _mp:mp-aaaaadsb _oqmd: _oqmd:oqmd-89768 _paper: _paper:10.1016/j.actamat.2015.02.044:GdZn _tdb: _tdb:GdZn-15Gro.tdb:GDZN_B2 ### TDB models of GDZN_B2 (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): GDZN_B2, type code %, sha256 `9f155d2a3829e5b7…` ~~~~text 44: PHASE GDZN_B2 % 2 1 1 ! 45: CONST GDZN_B2 : GD : ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(70)90074-3](https://doi.org/10.1016/0022-5088%2870%2990074-3) G. Bruzzone, M.L. Fornasini, F. Merlo, Rare-earth intermediate phases with zinc, Journal of the Less Common Metals 22, 253-264 (1970). _cited as the source of values for this phase_ ## GDZN12_D2B (Gd–Zn) - Id: `phase:gd-zn:gdzn12-d2b`; status `assigned` - Structure: Mn12Th · D2_b · tI26 · I4/mmm (139); type `st:d2-b-mn12th-ti26`; tier A: standard phase name; confidence high - Stoichiometry: Gd 0.0769, Zn 0.9231 - Stability: stable in 1 of 1 calculated diagram(s): 300–932.14 K, x(Zn) 0.92308–0.92308 - Literature: 4 values (4 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:gdzn12-d2b) Names (3): _corpus: _corpus:phase:gd-zn:gdzn12-d2b _paper: _paper:10.1016/j.actamat.2015.02.044:GdZn12 _tdb: _tdb:GdZn-15Gro.tdb:GDZN12_D2B ### TDB models of GDZN12_D2B (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): GDZN12_D2B, type code %, sha256 `9f155d2a3829e5b7…` ~~~~text 79: PHASE GDZN12_D2B % 2 1 12 ! 80: CONST GDZN12_D2B : GD : ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(70)90074-3](https://doi.org/10.1016/0022-5088%2870%2990074-3) G. Bruzzone, M.L. Fornasini, F. Merlo, Rare-earth intermediate phases with zinc, Journal of the Less Common Metals 22, 253-264 (1970). _cited as the source of values for this phase_ ## GDZN2 (Gd–Zn) - Id: `phase:gd-zn:gdzn2`; status `assigned` - Structure: Hg2K · oI12 · Imma (74); type `st:hg2k-oi12`; 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 (dft_space_group_74_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Gd 0.3333, Zn 0.6667 - Stability: stable in 1 of 1 calculated diagram(s): 300–1281.99 K, x(Zn) 0.66667–0.66667 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:gdzn2) Names (3): _corpus: _corpus:phase:gd-zn:gdzn2 _paper: _paper:10.1016/j.actamat.2015.02.044:GdZn2 _tdb: _tdb:GdZn-15Gro.tdb:GDZN2 ### TDB models of GDZN2 (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): GDZN2, type code %, sha256 `9f155d2a3829e5b7…` ~~~~text 49: PHASE GDZN2 % 2 1 2 ! 50: CONST GDZN2 : GD : ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(70)90074-3](https://doi.org/10.1016/0022-5088%2870%2990074-3) G. Bruzzone, M.L. Fornasini, F. Merlo, Rare-earth intermediate phases with zinc, Journal of the Less Common Metals 22, 253-264 (1970). _cited as the source of values for this phase_ ## GDZN3 (Gd–Zn) - Id: `phase:gd-zn:gdzn3`; status `assigned` - Structure: YZn3 · oP16 · Pnma (62); type `st:yzn3-op16`; 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: Gd 0.2500, Zn 0.7500 - Stability: stable in 1 of 1 calculated diagram(s): 300–1175.08 K, x(Zn) 0.75–0.75 - Literature: 4 values (4 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:gdzn3) Names (3): _corpus: _corpus:phase:gd-zn:gdzn3 _paper: _paper:10.1016/j.actamat.2015.02.044:GdZn3 _tdb: _tdb:GdZn-15Gro.tdb:GDZN3 ### TDB models of GDZN3 (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): GDZN3, type code %, sha256 `9f155d2a3829e5b7…` ~~~~text 54: PHASE GDZN3 % 2 1 3 ! 55: CONST GDZN3 : GD : ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(70)90074-3](https://doi.org/10.1016/0022-5088%2870%2990074-3) G. Bruzzone, M.L. Fornasini, F. Merlo, Rare-earth intermediate phases with zinc, Journal of the Less Common Metals 22, 253-264 (1970). _cited as the source of values for this phase_ ## HCP_A3 (Gd–Zn) - Id: `phase:gd-zn: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 1 of 1 calculated diagram(s): 300–2498.92 K, x(Zn) 0–1 - Literature: 4 values (4 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:hcp-a3) Names (4): _corpus: _corpus:phase:gd-zn:hcp-a3 _paper: _paper:10.1016/j.actamat.2015.02.044:(Gd), paper:10.1016/j.actamat.2015.02.044:(Zn) _tdb: _tdb:GdZn-15Gro.tdb:HCP_A3 ### TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): HCP_A3, type code %A, sha256 `9f155d2a3829e5b7…` ~~~~text 39: PHASE HCP_A3 %A 2 1 0.5 ! 40: CONST HCP_A3 : GD% ZN% : VA : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(70)90074-3](https://doi.org/10.1016/0022-5088%2870%2990074-3) G. Bruzzone, M.L. Fornasini, F. Merlo, Rare-earth intermediate phases with zinc, Journal of the Less Common Metals 22, 253-264 (1970). _cited as the source of values for this phase_ ## LIQUID (Gd–Zn) - Id: `phase:gd-zn:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 692.67–2500 K, x(Zn) 0–1 - Literature: 26 values (26 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:gd-zn:liquid) Names (3): _corpus: _corpus:phase:gd-zn:liquid _paper: _paper:10.1016/j.actamat.2015.02.044:L _tdb: _tdb:GdZn-15Gro.tdb:LIQUID ### TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written [GdZn-15Gro.tdb](https://orchid-project.org/data/databases/sgte-binary/GdZn-15Gro.tdb): LIQUID, type code %, sha256 `9f155d2a3829e5b7…` ~~~~text 24: PHASE LIQUID:L % 1 1 ! 25: CONST LIQUID:L : GD ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.actamat.2015.02.044](https://doi.org/10.1016/j.actamat.2015.02.044) Joachim Gröbner, Artem Kozlov, Xi-Ya Fang, Suming Zhu, Jian-Feng Nie, Mark A. Gibson et al., Phase equilibria and transformations in ternary Mg–Gd–Zn alloys, Acta Materialia 90, 400-416 (2015). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(70)90074-3](https://doi.org/10.1016/0022-5088%2870%2990074-3) G. Bruzzone, M.L. Fornasini, F. Merlo, Rare-earth intermediate phases with zinc, Journal of the Less Common Metals 22, 253-264 (1970). _cited as the source of values for 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).