# Er–Ge phases > Er–Ge system: 16 phases (tier A 6, tier B 1, tier C 5, liquid 1, needs_review 3); 14 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/ER-GE.html · Markdown: https://data.orchid-project.org/phases/pages/ER-GE.md 16 phases (tier A 6, tier B 1, tier C 5, liquid 1, needs_review 3); 14 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=ER-GE) · [full JSON](https://data.orchid-project.org/phases/systems/ER-GE.json) · [Er–Ge system page](https://data.orchid-project.org/systems/ER-GE.html) · [Markdown](https://data.orchid-project.org/phases/pages/ER-GE.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Er–Ge system (16) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [DIAMOND_A4](#phase-er-ge-a4-diamond); _phase:er-ge:a4-diamond_ | C (diamond) · A4 · cF8 · Fd-3m (227) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1211.4 K, x(Ge) 1–1 | 4 | 1 | | [BCC_A2](#phase-er-ge-bcc-a2); _phase:er-ge:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 | | [ER11GE10](#phase-er-ge-er11ge10); _phase:er-ge:er11ge10_ | Ge10Ho11 · tI84 · I4/mmm (139) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1978.86 K, x(Ge) 0.47619–0.47619 | 15 | 1 | | [ER2GE3_LT](#phase-er-ge-er2ge3); _phase:er-ge:er2ge3_ | Er2Ge3 · mC6 · C2/m (12) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1239 K, x(Ge) 0.6–0.6 | 3 | 1 | | [ER2GE3_C32](#phase-er-ge-er2ge3-c32); _phase:er-ge:er2ge3-c32_ | | needs_review | stable in 1 of 1 calculated diagram(s): 1239–1676.46 K, x(Ge) 0.6–0.6 | 12 | 1 | | [ER2GE5](#phase-er-ge-er2ge5); _phase:er-ge:er2ge5_ | DyGe3 · oC16 · Cmcm (63) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1153.27 K, x(Ge) 0.71429–0.71429 | 16 | 1 | | [ER3GE4](#phase-er-ge-er3ge4); _phase:er-ge:er3ge4_ | Er3Ge4 · oC28 · Cmcm (63) | tier B: DFT-supported (unique MP + OQMD match) | stable in 1 of 1 calculated diagram(s): 300–1535.75 K, x(Ge) 0.57143–0.57143 | 11 | 1 | | [ER5GE3_D88](#phase-er-ge-er5ge3-d88); _phase:er-ge:er5ge3-d88_ | Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2224.69 K, x(Ge) 0.375–0.39509 | 21 | 1 | | [ER5GE4](#phase-er-ge-er5ge4); _phase:er-ge:er5ge4_ | Ge4Sm5 · oP36 · Pnma (62) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–2153.29 K, x(Ge) 0.44444–0.44444 | 14 | 1 | | [ERGE_B33](#phase-er-ge-erge-b33); _phase:er-ge:erge-b33_ | CrB · B33 · oC8 · Cmcm (63) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1739.39 K, x(Ge) 0.5–0.5 | 15 | 1 | | [ERGE2_HT](#phase-er-ge-erge2-ht); _phase:er-ge:erge2-ht_ | | needs_review | stable in 1 of 1 calculated diagram(s): 1234.45–1313.59 K, x(Ge) 0.66667–0.66667 | 9 | 1 | | [ERGE2_LT](#phase-er-ge-erge2-lt); _phase:er-ge:erge2-lt_ | DyGe2 · oC24 · Cmc2_1 (36) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1179.78 K, x(Ge) 0.66667–0.66667 | 6 | 1 | | [ERGE2_MT](#phase-er-ge-erge2-mt); _phase:er-ge:erge2-mt_ | | needs_review | stable in 1 of 1 calculated diagram(s): 1179.78–1234.45 K, x(Ge) 0.66667–0.66667 | 6 | 1 | | [FCC_A1](#phase-er-ge-fcc-a1); _phase:er-ge:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 | | [HCP_A3](#phase-er-ge-hcp-a3); _phase:er-ge:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1807 K, x(Ge) 0–0 | 7 | 1 | | [LIQUID](#phase-er-ge-liquid); _phase:er-ge:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 1139.25–2500 K, x(Ge) 0–1 | 34 | 1 | ## DIAMOND_A4 (Er–Ge) - Id: `phase:er-ge:a4-diamond`; status `assigned` - Structure: C (diamond) · A4 · cF8 · Fd-3m (227); type `st:a4-c-diamond-cf8`; tier A: standard phase name; confidence high - Stoichiometry: Ge 1.0000 - Stability: stable in 1 of 1 calculated diagram(s): 300–1211.4 K, x(Ge) 1–1 - Literature: 4 values (3 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:a4-diamond) Names (4): _corpus: _corpus:phase:er-ge:a4-diamond, corpus:phase:er-ge:diamond-a4 _paper: _paper:10.1016/j.jallcom.2017.07.129:Ge _tdb: _tdb:ErGe-17Ach.tdb:DIAMOND_A4 ### TDB models of DIAMOND_A4 (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): DIAMOND_A4, type code %, sha256 `734d825c539b2116…` ~~~~text 46: PHASE DIAMOND_A4 % 1 1 ! 47: CONST DIAMOND_A4 : GE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## BCC_A2 (Er–Ge) - Id: `phase:er-ge:bcc-a2`; status `assigned` - Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; 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:er-ge:bcc-a2) Names (2): _corpus: _corpus:phase:er-ge:bcc-a2 _tdb: _tdb:ErGe-17Ach.tdb:BCC_A2 ### TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): BCC_A2, type code %B, sha256 `734d825c539b2116…` ~~~~text 36: PHASE BCC_A2 %B 2 1 3 ! 37: CONST BCC_A2 : ER GE : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase_ ## ER11GE10 (Er–Ge) - Id: `phase:er-ge:er11ge10`; status `assigned` - Structure: Ge10Ho11 · tI84 · I4/mmm (139); type `st:ge10ho11-ti84`; 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: Er 0.5238, Ge 0.4762 - Stability: stable in 1 of 1 calculated diagram(s): 300–1978.86 K, x(Ge) 0.47619–0.47619 - Literature: 15 values (15 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:er11ge10) Names (3): _corpus: _corpus:phase:er-ge:er11ge10 _paper: _paper:10.1016/j.jallcom.2017.07.129:Er11Ge10 _tdb: _tdb:ErGe-17Ach.tdb:ER11GE10 ### TDB models of ER11GE10 (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): ER11GE10, type code %, sha256 `734d825c539b2116…` ~~~~text 61: PHASE ER11GE10 % 2 11 10 ! 62: CONST ER11GE10 : ER : GE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## ER2GE3_LT (Er–Ge) - Id: `phase:er-ge:er2ge3`; status `assigned` - Structure: Er2Ge3 · mC6 · C2/m (12); type `st:er2ge3-mc6`; 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: Er 0.4000, Ge 0.6000 - Stability: stable in 1 of 1 calculated diagram(s): 300–1239 K, x(Ge) 0.6–0.6 - Literature: 3 values (3 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:er2ge3) Names (4): _corpus: _corpus:phase:er-ge:er2ge3, corpus:phase:er-ge:er2ge3-lt _paper: _paper:10.1016/j.jallcom.2017.07.129:LT_Er2Ge3 _tdb: _tdb:ErGe-17Ach.tdb:ER2GE3_LT ### TDB models of ER2GE3_LT (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): ER2GE3_LT, type code %, sha256 `734d825c539b2116…` ~~~~text 76: PHASE ER2GE3_LT % 2 2 3 ! 77: CONST ER2GE3_LT : ER : GE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## ER2GE3_C32 (Er–Ge) - Id: `phase:er-ge:er2ge3-c32`; status `needs_review` - No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_C32; stoichiometry_contradicts_C32:ErGe-17Ach.tdb - Candidate (literature_printed): AlB2 · hP3 — printed with a label mapped to this phase - Candidate (name_token): AlB2 · C32 · hP3 · P6/mmm (191) — Strukturbericht/word 'C32' in the TDB name - Candidate (sgte_mmc2): AlB2 · C32 · hP3 · P6/mmm (191) — Hallstedt 2025 mmc2 row for ER2GE3_C32: Er2Ge3 (high T) - Candidate (tdb_comment): AlB2 · hP3 · P6/mmm — ErGe-17Ach.tdb: 'Prototype AlB2 (hP3, P6/mmm)' - Stoichiometry: Er 0.4000, Ge 0.6000 - Stability: stable in 1 of 1 calculated diagram(s): 1239–1676.46 K, x(Ge) 0.6–0.6 - Literature: 12 values (12 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:er2ge3-c32) Names (3): _corpus: _corpus:phase:er-ge:er2ge3-c32 _paper: _paper:10.1016/j.jallcom.2017.07.129:HT_Er2Ge3 _tdb: _tdb:ErGe-17Ach.tdb:ER2GE3_C32 ### TDB models of ER2GE3_C32 (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): ER2GE3_C32, type code %, sha256 `734d825c539b2116…` ~~~~text 81: PHASE ER2GE3_C32 % 2 2 3 ! 82: CONST ER2GE3_C32 : ER : GE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## ER2GE5 (Er–Ge) - Id: `phase:er-ge:er2ge5`; status `assigned` - Structure: DyGe3 · oC16 · Cmcm (63); type `st:dyge3-oc16`; 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: Er 0.2857, Ge 0.7143 - Stability: stable in 1 of 1 calculated diagram(s): 300–1153.27 K, x(Ge) 0.71429–0.71429 - Literature: 16 values (16 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:er2ge5) Names (3): _corpus: _corpus:phase:er-ge:er2ge5 _paper: _paper:10.1016/j.jallcom.2017.07.129:Er2Ge5 _tdb: _tdb:ErGe-17Ach.tdb:ER2GE5 ### TDB models of ER2GE5 (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): ER2GE5, type code %, sha256 `734d825c539b2116…` ~~~~text 101: PHASE ER2GE5 % 2 2 5 ! 102: CONST ER2GE5 : ER : GE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## ER3GE4 (Er–Ge) - Id: `phase:er-ge:er3ge4`; status `assigned` - Structure: Er3Ge4 · oC28 · Cmcm (63); type `st:er3ge4-oc28`; tier B: DFT-supported (unique MP + OQMD match); confidence high - Stoichiometry: Er 0.4286, Ge 0.5714 - Stability: stable in 1 of 1 calculated diagram(s): 300–1535.75 K, x(Ge) 0.57143–0.57143 - Literature: 11 values (11 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:er3ge4) Names (5): _corpus: _corpus:phase:er-ge:er3ge4 _mp: _mp:mp-aaaaacnv _oqmd: _oqmd:oqmd-14536 _paper: _paper:10.1016/j.jallcom.2017.07.129:Er3Ge4 _tdb: _tdb:ErGe-17Ach.tdb:ER3GE4 ### TDB models of ER3GE4 (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): ER3GE4, type code %, sha256 `734d825c539b2116…` ~~~~text 71: PHASE ER3GE4 % 2 3 4 ! 72: CONST ER3GE4 : ER : GE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## ER5GE3_D88 (Er–Ge) - Id: `phase:er-ge:er5ge3-d88`; status `assigned` - Structure: Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193); type `st:d8-8-mn5si3-hp16`; tier A: standard phase name; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 300–2224.69 K, x(Ge) 0.375–0.39509 - Literature: 21 values (21 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:er5ge3-d88) Names (3): _corpus: _corpus:phase:er-ge:er5ge3-d88 _paper: _paper:10.1016/j.jallcom.2017.07.129:Er5Ge3 _tdb: _tdb:ErGe-17Ach.tdb:ER5GE3_D88 ### TDB models of ER5GE3_D88 (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): ER5GE3_D88, type code %, sha256 `734d825c539b2116…` ~~~~text 51: PHASE ER5GE3_D88 % 2 5 3 ! 52: CONST ER5GE3_D88 : ER% GE : GE : ! ~~~~ Example references (5 of 5; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ - [doi:10.1051/jcp/1997940928](https://doi.org/10.1051/jcp/1997940928) SV Meschel, OJ Klepp, Recent thermochemical studies of the binary alloys of Er with group IVB elements by high temperature direct synthesis calorimetry, J. Chim. Phys. 94, 928-938 (1997). _cited as the source of values for this phase_ ## ER5GE4 (Er–Ge) - Id: `phase:er-ge:er5ge4`; status `assigned` - Structure: Ge4Sm5 · oP36 · Pnma (62); type `st:ge4sm5-op36`; 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_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Er 0.5556, Ge 0.4444 - Stability: stable in 1 of 1 calculated diagram(s): 300–2153.29 K, x(Ge) 0.44444–0.44444 - Literature: 14 values (14 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:er5ge4) Names (3): _corpus: _corpus:phase:er-ge:er5ge4 _paper: _paper:10.1016/j.jallcom.2017.07.129:Er5Ge4 _tdb: _tdb:ErGe-17Ach.tdb:ER5GE4 ### TDB models of ER5GE4 (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): ER5GE4, type code %, sha256 `734d825c539b2116…` ~~~~text 56: PHASE ER5GE4 % 2 5 4 ! 57: CONST ER5GE4 : ER : GE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## ERGE_B33 (Er–Ge) - Id: `phase:er-ge:erge-b33`; status `assigned` - Structure: CrB · B33 · oC8 · Cmcm (63); type `st:b33-crb-oc8`; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaaaadjc and oqmd-7744, space group 63 - Stoichiometry: Er 0.5000, Ge 0.5000 - Stability: stable in 1 of 1 calculated diagram(s): 300–1739.39 K, x(Ge) 0.5–0.5 - Literature: 15 values (15 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:erge-b33) Names (6): _corpus: _corpus:phase:er-ge:erge-b33 _mp: _mp:mp-aaaaadjc _oqmd: _oqmd:oqmd-7744 _paper: _paper:10.1016/j.jallcom.2017.07.129:Er Ge, paper:10.1016/j.jallcom.2017.07.129:ErGe _tdb: _tdb:ErGe-17Ach.tdb:ERGE_B33 ### TDB models of ERGE_B33 (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): ERGE_B33, type code %, sha256 `734d825c539b2116…` ~~~~text 66: PHASE ERGE_B33 % 2 1 1 ! 67: CONST ERGE_B33 : ER : GE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## ERGE2_HT (Er–Ge) - Id: `phase:er-ge:erge2-ht`; status `needs_review` - No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition; sgte_mmc2_row_incomplete - Candidate (literature_printed): ErGe2-ht · ? — printed with a label mapped to this phase - Candidate (sgte_mmc2): ErGe2-ht — Hallstedt 2025 mmc2 row for ERGE2_HT: ErGe2 (high T) - Stoichiometry: Er 0.3333, Ge 0.6667 - Stability: stable in 1 of 1 calculated diagram(s): 1234.45–1313.59 K, x(Ge) 0.66667–0.66667 - Literature: 9 values (9 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:erge2-ht) Names (4): _corpus: _corpus:phase:er-ge:erge2-ht _paper: _paper:10.1016/j.jallcom.2017.07.129:Er Ge2, paper:10.1016/j.jallcom.2017.07.129:HT_ErGe2 _tdb: _tdb:ErGe-17Ach.tdb:ERGE2_HT ### TDB models of ERGE2_HT (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): ERGE2_HT, type code %, sha256 `734d825c539b2116…` ~~~~text 96: PHASE ERGE2_HT % 2 1 2 ! 97: CONST ERGE2_HT : ER : GE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## ERGE2_LT (Er–Ge) - Id: `phase:er-ge:erge2-lt`; status `assigned` - Structure: DyGe2 · oC24 · Cmc2_1 (36); type `st:dyge2-oc24`; 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: Er 0.3333, Ge 0.6667 - Stability: stable in 1 of 1 calculated diagram(s): 300–1179.78 K, x(Ge) 0.66667–0.66667 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:erge2-lt) Names (3): _corpus: _corpus:phase:er-ge:erge2-lt _paper: _paper:10.1016/j.jallcom.2017.07.129:LT_ErGe2 _tdb: _tdb:ErGe-17Ach.tdb:ERGE2_LT ### TDB models of ERGE2_LT (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): ERGE2_LT, type code %, sha256 `734d825c539b2116…` ~~~~text 86: PHASE ERGE2_LT % 2 1 2 ! 87: CONST ERGE2_LT : ER : GE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## ERGE2_MT (Er–Ge) - Id: `phase:er-ge:erge2-mt`; status `needs_review` - No structure assigned. Why: name_has_descriptive_tokens:MT; no_structure_token; sgte_mmc2_row_incomplete - Candidate (literature_printed): ErGe2-mt · ? — printed with a label mapped to this phase - Candidate (sgte_mmc2): ErGe2-mt — Hallstedt 2025 mmc2 row for ERGE2_MT: ErGe2 (medium T) - Stoichiometry: Er 0.3333, Ge 0.6667 - Stability: stable in 1 of 1 calculated diagram(s): 1179.78–1234.45 K, x(Ge) 0.66667–0.66667 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:erge2-mt) Names (3): _corpus: _corpus:phase:er-ge:erge2-mt _paper: _paper:10.1016/j.jallcom.2017.07.129:MT_ErGe2 _tdb: _tdb:ErGe-17Ach.tdb:ERGE2_MT ### TDB models of ERGE2_MT (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): ERGE2_MT, type code %, sha256 `734d825c539b2116…` ~~~~text 91: PHASE ERGE2_MT % 2 1 2 ! 92: CONST ERGE2_MT : ER : GE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## FCC_A1 (Er–Ge) - Id: `phase:er-ge: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:er-ge:fcc-a1) Names (2): _corpus: _corpus:phase:er-ge:fcc-a1 _tdb: _tdb:ErGe-17Ach.tdb:FCC_A1 ### TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): FCC_A1, type code %A, sha256 `734d825c539b2116…` ~~~~text 31: PHASE FCC_A1 %A 2 1 1 ! 32: CONST FCC_A1 : ER GE : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase_ ## HCP_A3 (Er–Ge) - Id: `phase:er-ge: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): 300–1807 K, x(Ge) 0–0 - Literature: 7 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:hcp-a3) Names (3): _corpus: _corpus:phase:er-ge:hcp-a3 _paper: _paper:10.1016/j.jallcom.2017.07.129:Er _tdb: _tdb:ErGe-17Ach.tdb:HCP_A3 ### TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): HCP_A3, type code %, sha256 `734d825c539b2116…` ~~~~text 41: PHASE HCP_A3 % 2 1 0.5 ! 42: CONST HCP_A3 : ER% GE : VA : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ ## LIQUID (Er–Ge) - Id: `phase:er-ge:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 1139.25–2500 K, x(Ge) 0–1 - Literature: 34 values (32 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-ge:liquid) Names (4): _corpus: _corpus:phase:er-ge:liquid _paper: _paper:10.1016/j.jallcom.2017.07.129:L, paper:10.1016/j.jallcom.2017.07.129:liquid _tdb: _tdb:ErGe-17Ach.tdb:LIQUID ### TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written [ErGe-17Ach.tdb](https://orchid-project.org/data/databases/sgte-binary/ErGe-17Ach.tdb): LIQUID, type code %, sha256 `734d825c539b2116…` ~~~~text 26: PHASE LIQUID:L % 1 1 ! 27: CONST LIQUID:L : ER GE : ! ~~~~ Example references (5 of 5; assessments first): - [doi:10.1016/j.jallcom.2017.07.129](https://doi.org/10.1016/j.jallcom.2017.07.129) Khadija Achgar, Saïd Kardellass, Najim Selhaoui, Lahcen Bouirden, Thermodynamic optimization of the Erbium-Germanium binary system, Journal of Alloys and Compounds 724, 1157-1166 (2017). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2007.10.002](https://doi.org/10.1016/j.calphad.2007.10.002) G. Kaptay, Calphad 32e2 (2008) 338e352. _cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2004.08.005](https://doi.org/10.1016/j.calphad.2004.08.005) G. Kaptay, Calphad 28 (2004) 115. _cited as the source of values for this phase_ - [doi:10.1021/ie50458a036](https://doi.org/10.1021/ie50458a036) Otto Redlich, A. T. Kister, Algebraic Representation of Thermodynamic Properties and the Classification of Solutions, Ind. Eng. Chem. 40, 345-348 (1948). _cited as the source of values for this phase_ - [doi:10.1143/jjap.45.2925](https://doi.org/10.1143/jjap.45.2925) Yoshinori Tsuchiya, Masato Koyama, Junji Koga, Akira Nishiyama, Material Characterization of Metal Germanide Gate Electrodes Formed by Fully Germanided Gate Process, jjap 45, 2925 (2006). _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).