# La–Zn phases > La–Zn system: 15 phases (tier A 8, tier B 3, tier C 2, liquid 1, needs_review 1); 15 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/LA-ZN.html · Markdown: https://data.orchid-project.org/phases/pages/LA-ZN.md 15 phases (tier A 8, tier B 3, tier C 2, liquid 1, needs_review 1); 15 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=LA-ZN) · [full JSON](https://data.orchid-project.org/phases/systems/LA-ZN.json) · [La–Zn system page](https://data.orchid-project.org/systems/LA-ZN.html) · [Markdown](https://data.orchid-project.org/phases/pages/LA-ZN.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the La–Zn system (15) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BCC_A2](#phase-la-zn-bcc-a2); _phase:la-zn:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 1074.26–1194.26 K, x(Zn) 0–0.02112 | 0 | 3 | | [B2_BCC](#phase-la-zn-bcc-b2); _phase:la-zn:bcc-b2_ | CsCl · B2 · cP2 · Pm-3m (221) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1198.92 K, x(Zn) 0–0.5 | 6 | 1 | | [DHCP](#phase-la-zn-dhcp-a3); _phase:la-zn:dhcp-a3_ | alpha-La · A3' · hP4 · P6_3/mmc (194) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–749.99 K, x(Zn) 0–0 | 0 | 2 | | [FCC_A1](#phase-la-zn-fcc-a1); _phase:la-zn:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 519.19–1174.33 K, x(Zn) 0–0.02718 | 2 | 2 | | [HCP_A3](#phase-la-zn-hcp-a3); _phase:la-zn:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2498.93 K, x(Zn) 1–1 | 2 | 2 | | [LA2ZN17](#phase-la-zn-la2zn17); _phase:la-zn:la2zn17_ | Th2Zn17 · hR19 · R-3m (166) | tier B: DFT-supported (unique MP + OQMD match) | stable in 2 of 2 calculated diagram(s): 300–1245.8 K, x(Zn) 0.89474–0.89474 | 11 | 2 | | [LA3ZN22](#phase-la-zn-la3zn22); _phase:la-zn:la3zn22_ | Ce3Zn22 · tI100 · I4_1/amd (141) | tier B: DFT-supported (unique MP + OQMD match) | stable in 2 of 2 calculated diagram(s): 300–1241.11 K, x(Zn) 0.88–0.88 | 6 | 2 | | [LAZN_B2](#phase-la-zn-lazn-b2); _phase:la-zn:lazn-b2_ | CsCl · B2 · cP2 · Pm-3m (221) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1085.16 K, x(Zn) 0.5–0.5 | 7 | 1 | | [LAZN11](#phase-la-zn-lazn11); _phase:la-zn:lazn11_ | BaCd11 · tI48 · I4_1/amd (141) | tier B: DFT-supported (unique MP + OQMD match) | stable in 2 of 2 calculated diagram(s): 300–1127.23 K, x(Zn) 0.91667–0.91667 | 10 | 2 | | [LAZN13_D23](#phase-la-zn-lazn13-d23); _phase:la-zn:lazn13-d23_ | NaZn13 · D2_3 · cF112 · Fm-3c (226) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–976.85 K, x(Zn) 0.92857–0.92857 | 6 | 2 | | [LAZN2](#phase-la-zn-lazn2); _phase:la-zn:lazn2_ | Hg2K · oI12 · Imma (74) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1121.96 K, x(Zn) 0.66667–0.66667 | 13 | 2 | | [LAZN4](#phase-la-zn-lazn4); _phase:la-zn:lazn4_ | LaZn4 · oC20 · Cmcm (63) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1138.82 K, x(Zn) 0.8–0.8 | 9 | 2 | | [LAZN5_D2D](#phase-la-zn-lazn5-d2d); _phase:la-zn:lazn5-d2d_ | CaCu5 · D2_d · hP6 · P6/mmm (191) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1178.38 K, x(Zn) 0.83333–0.83333 | 7 | 2 | | [LAZN7](#phase-la-zn-lazn7); _phase:la-zn:lazn7_ | | needs_review | stable in 1 of 1 calculated diagram(s): 300–1213.35 K, x(Zn) 0.875–0.875 | 2 | 1 | | [LIQUID](#phase-la-zn-liquid); _phase:la-zn:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 692.67–2500 K, x(Zn) 0–1 | 48 | 2 | ## BCC_A2 (La–Zn) - Id: `phase:la-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 2 of 2 calculated diagram(s): 1074.26–1194.26 K, x(Zn) 0–0.02112 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:bcc-a2) Names (4): _corpus: _corpus:phase:la-zn:bcc-a2 _tdb: _tdb:LaZn-10Qi.tdb:A2_BCC, tdb:LaZn-10Qi.tdb:BCC_A2, tdb:LaZn-12Ber.tdb:BCC_A2 ### TDB models of BCC_A2 (3): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): A2_BCC, type code %B, sha256 `97c5cfdc1bfd8927…` ~~~~text 40: PHASE A2_BCC %B 2 1 3 ! 41: CONST A2_BCC : LA ZN : VA : ! ~~~~ [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): BCC_A2, type code %B, sha256 `97c5cfdc1bfd8927…` ~~~~text 35: PHASE BCC_A2 %B 2 1 3 ! 36: CONST BCC_A2 : LA ZN : VA : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): BCC_A2, type code %B, sha256 `e38dcc486f44a268…` ~~~~text 41: PHASE BCC_A2 %B 2 1 3 ! 42: CONST BCC_A2 : LA ZN : VA : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase_ - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase_ ## B2_BCC (La–Zn) - Id: `phase:la-zn:bcc-b2`; status `assigned` - Structure: CsCl · B2 · cP2 · Pm-3m (221); type `st:b2-cscl-cp2`; tier A: standard phase name; confidence high - Caveat: LaZn-10Qi.tdb: ordered phase with disordered part A2_BCC (order/disorder model) - Caveat: partitioned order/disorder model in LaZn-10Qi.tdb also describes the disordered state - Stability: stable in 1 of 1 calculated diagram(s): 300–1198.92 K, x(Zn) 0–0.5 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:bcc-b2) Names (4): _corpus: _corpus:phase:la-zn:bcc-b2, corpus:phase:la-zn:b2-bcc _paper: _paper:10.1016/j.jallcom.2010.03.062:LaZn(B2) _tdb: _tdb:LaZn-10Qi.tdb:B2_BCC ### TDB models of B2_BCC (1): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): B2_BCC, type code %BO, sha256 `97c5cfdc1bfd8927…` ~~~~text 45: PHASE B2_BCC %BO 3 0.5 0.5 3 ! 46: CONST B2_BCC : LA% ZN : LA ZN% : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase; reports values for this phase_ ## DHCP (La–Zn) - Id: `phase:la-zn:dhcp-a3`; status `assigned` - Structure: alpha-La · A3' · hP4 · P6_3/mmc (194); type `st:a3-alpha-la-hp4`; tier A: standard phase name; confidence high - Stability: stable in 2 of 2 calculated diagram(s): 300–749.99 K, x(Zn) 0–0 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:dhcp-a3) Names (4): _corpus: _corpus:phase:la-zn:dhcp-a3, corpus:phase:la-zn:dhcp _tdb: _tdb:LaZn-10Qi.tdb:DHCP, tdb:LaZn-12Ber.tdb:DHCP ### TDB models of DHCP (2): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): DHCP, type code %, sha256 `97c5cfdc1bfd8927…` ~~~~text 55: PHASE DHCP % 1 1 ! 56: CONST DHCP : LA : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): DHCP, type code %, sha256 `e38dcc486f44a268…` ~~~~text 51: PHASE DHCP % 1 1 ! 52: CONST DHCP : LA% ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase_ - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase_ ## FCC_A1 (La–Zn) - Id: `phase:la-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: stable in 2 of 2 calculated diagram(s): 519.19–1174.33 K, x(Zn) 0–0.02718 - Literature: 2 values (2 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:fcc-a1) Names (4): _corpus: _corpus:phase:la-zn:fcc-a1 _paper: _paper:10.1016/j.jallcom.2010.03.062:Fcc _tdb: _tdb:LaZn-10Qi.tdb:FCC_A1, tdb:LaZn-12Ber.tdb:FCC_A1 ### TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): FCC_A1, type code %A, sha256 `97c5cfdc1bfd8927…` ~~~~text 30: PHASE FCC_A1 %A 2 1 1 ! 31: CONST FCC_A1 : LA% ZN : VA : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): FCC_A1, type code %A, sha256 `e38dcc486f44a268…` ~~~~text 36: PHASE FCC_A1 %A 2 1 1 ! 37: CONST FCC_A1 : LA% ZN : VA : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase_ ## HCP_A3 (La–Zn) - Id: `phase:la-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 2 of 2 calculated diagram(s): 300–2498.93 K, x(Zn) 1–1 - Literature: 2 values (2 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:hcp-a3) Names (4): _corpus: _corpus:phase:la-zn:hcp-a3 _paper: _paper:10.1016/j.calphad.2011.11.004:hcp-Zn _tdb: _tdb:LaZn-10Qi.tdb:HCP_A3, tdb:LaZn-12Ber.tdb:HCP_A3 ### TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): HCP_A3, type code %, sha256 `97c5cfdc1bfd8927…` ~~~~text 50: PHASE HCP_A3 % 2 1 0.5 ! 51: CONST HCP_A3 : LA ZN% : VA : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): HCP_A3, type code %, sha256 `e38dcc486f44a268…` ~~~~text 46: PHASE HCP_A3 % 2 1 0.5 ! 47: CONST HCP_A3 : ZN : VA : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase_ - [doi:10.1016/j.tca.2011.05.001](https://doi.org/10.1016/j.tca.2011.05.001) A. Berche, P. Benigni, J. Rogez, M.C. Record, New experimental investigation of the lanthanum zinc phase diagram, Thermochimica Acta 523, 70-78 (2011). _cited as the source of values for this phase_ ## LA2ZN17 (La–Zn) - Id: `phase:la-zn:la2zn17`; status `assigned` - Structure: Th2Zn17 · hR19 · R-3m (166); type `st:th2zn17-hr19`; tier B: DFT-supported (unique MP + OQMD match); confidence high - Stoichiometry: La 0.1053, Zn 0.8947 - Stability: stable in 2 of 2 calculated diagram(s): 300–1245.8 K, x(Zn) 0.89474–0.89474 - Literature: 11 values (11 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:la2zn17) Names (7): _corpus: _corpus:phase:la-zn:la2zn17 _mp: _mp:mp-aaaabtld _oqmd: _oqmd:oqmd-17369 _paper: _paper:10.1016/j.calphad.2011.11.004:La2Zn17, paper:10.1016/j.jallcom.2010.03.062:La2Zn17 _tdb: _tdb:LaZn-10Qi.tdb:LA2ZN17, tdb:LaZn-12Ber.tdb:LA2ZN17 ### TDB models of LA2ZN17 (2): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): LA2ZN17, type code %, sha256 `97c5cfdc1bfd8927…` ~~~~text 80: PHASE LA2ZN17 % 2 2 17 ! 81: CONST LA2ZN17 : LA : ZN : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): LA2ZN17, type code %, sha256 `e38dcc486f44a268…` ~~~~text 86: PHASE LA2ZN17 % 2 2 17 ! 87: CONST LA2ZN17 : LA : ZN : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.tca.2011.05.001](https://doi.org/10.1016/j.tca.2011.05.001) A. Berche, P. Benigni, J. Rogez, M.C. Record, New experimental investigation of the lanthanum zinc phase diagram, Thermochimica Acta 523, 70-78 (2011). _cited as the source of values for this phase_ - [doi:10.1016/0022-5088(67)90001-x](https://doi.org/10.1016/0022-5088%2867%2990001-x) A. Iandelli, A. Palenzona, Zinc-rich phases of the rare-earth-zinc alloys, Journal of the Less Common Metals 12, 333-343 (1967). _cited as the source of values for this phase_ ## LA3ZN22 (La–Zn) - Id: `phase:la-zn:la3zn22`; status `assigned` - Structure: Ce3Zn22 · tI100 · I4_1/amd (141); type `st:ce3zn22-ti100`; tier B: DFT-supported (unique MP + OQMD match); confidence high - Stoichiometry: La 0.1200, Zn 0.8800 - Stability: stable in 2 of 2 calculated diagram(s): 300–1241.11 K, x(Zn) 0.88–0.88 - Literature: 6 values (6 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:la3zn22) Names (7): _corpus: _corpus:phase:la-zn:la3zn22 _mp: _mp:mp-aaacqiai _oqmd: _oqmd:oqmd-668320 _paper: _paper:10.1016/j.calphad.2011.11.004:La3Zn22, paper:10.1016/j.jallcom.2010.03.062:La3Zn22 _tdb: _tdb:LaZn-10Qi.tdb:LA3ZN22, tdb:LaZn-12Ber.tdb:LA3ZN22 ### TDB models of LA3ZN22 (2): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): LA3ZN22, type code %, sha256 `97c5cfdc1bfd8927…` ~~~~text 75: PHASE LA3ZN22 % 2 3 22 ! 76: CONST LA3ZN22 : LA : ZN : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): LA3ZN22, type code %, sha256 `e38dcc486f44a268…` ~~~~text 81: PHASE LA3ZN22 % 2 3 22 ! 82: CONST LA3ZN22 : LA : ZN : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.tca.2011.05.001](https://doi.org/10.1016/j.tca.2011.05.001) A. Berche, P. Benigni, J. Rogez, M.C. Record, New experimental investigation of the lanthanum zinc phase diagram, Thermochimica Acta 523, 70-78 (2011). _cited as the source of values for this phase_ ## LAZN_B2 (La–Zn) - Id: `phase:la-zn:lazn-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-aaaaadwp and oqmd-17583, space group 221 - Stoichiometry: La 0.5000, Zn 0.5000 - Stability: stable in 1 of 1 calculated diagram(s): 300–1085.16 K, x(Zn) 0.5–0.5 - Literature: 7 values (7 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:lazn-b2) Names (5): _corpus: _corpus:phase:la-zn:lazn-b2 _mp: _mp:mp-aaaaadwp _oqmd: _oqmd:oqmd-17583 _paper: _paper:10.1016/j.calphad.2011.11.004:LaZn _tdb: _tdb:LaZn-12Ber.tdb:LAZN_B2 ### TDB models of LAZN_B2 (1): PHASE and CONSTITUENT statements as written [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): LAZN_B2, type code %, sha256 `e38dcc486f44a268…` ~~~~text 56: PHASE LAZN_B2 % 2 1 1 ! 57: CONST LAZN_B2 : LA : ZN : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.tca.2011.05.001](https://doi.org/10.1016/j.tca.2011.05.001) A. Berche, P. Benigni, J. Rogez, M.C. Record, New experimental investigation of the lanthanum zinc phase diagram, Thermochimica Acta 523, 70-78 (2011). _cited as the source of values for this phase_ ## LAZN11 (La–Zn) - Id: `phase:la-zn:lazn11`; status `assigned` - Structure: BaCd11 · tI48 · I4_1/amd (141); type `st:bacd11-ti48`; tier B: DFT-supported (unique MP + OQMD match); confidence high - Stoichiometry: La 0.0833, Zn 0.9167 - Stability: stable in 2 of 2 calculated diagram(s): 300–1127.23 K, x(Zn) 0.91667–0.91667 - Literature: 10 values (10 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:lazn11) Names (7): _corpus: _corpus:phase:la-zn:lazn11 _mp: _mp:mp-aaabgmyx _oqmd: _oqmd:oqmd-19301 _paper: _paper:10.1016/j.calphad.2011.11.004:LaZn11, paper:10.1016/j.jallcom.2010.03.062:LaZn11 _tdb: _tdb:LaZn-10Qi.tdb:LAZN11, tdb:LaZn-12Ber.tdb:LAZN11 ### TDB models of LAZN11 (2): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): LAZN11, type code %, sha256 `97c5cfdc1bfd8927…` ~~~~text 85: PHASE LAZN11 % 2 1 11 ! 86: CONST LAZN11 : LA : ZN : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): LAZN11, type code %, sha256 `e38dcc486f44a268…` ~~~~text 91: PHASE LAZN11 % 2 1 11 ! 92: CONST LAZN11 : LA : ZN : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(67)90001-x](https://doi.org/10.1016/0022-5088%2867%2990001-x) A. Iandelli, A. Palenzona, Zinc-rich phases of the rare-earth-zinc alloys, Journal of the Less Common Metals 12, 333-343 (1967). _cited as the source of values for this phase_ - [doi:10.1016/j.tca.2011.05.001](https://doi.org/10.1016/j.tca.2011.05.001) A. Berche, P. Benigni, J. Rogez, M.C. Record, New experimental investigation of the lanthanum zinc phase diagram, Thermochimica Acta 523, 70-78 (2011). _cited as the source of values for this phase_ ## LAZN13_D23 (La–Zn) - Id: `phase:la-zn:lazn13-d23`; status `assigned` - Structure: NaZn13 · D2_3 · cF112 · Fm-3c (226); type `st:d2-3-nazn13-cf112`; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaacpxbe and oqmd-30675, space group 226 - Stoichiometry: La 0.0714, Zn 0.9286 - Stability: stable in 2 of 2 calculated diagram(s): 300–976.85 K, x(Zn) 0.92857–0.92857 - Literature: 6 values (6 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:lazn13-d23) Names (7): _corpus: _corpus:phase:la-zn:lazn13-d23 _mp: _mp:mp-aaacpxbe _oqmd: _oqmd:oqmd-30675 _paper: _paper:10.1016/j.calphad.2011.11.004:LaZn13, paper:10.1016/j.jallcom.2010.03.062:LaZn13 _tdb: _tdb:LaZn-10Qi.tdb:LAZN13_D23, tdb:LaZn-12Ber.tdb:LAZN13_D23 ### TDB models of LAZN13_D23 (2): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): LAZN13_D23, type code %, sha256 `97c5cfdc1bfd8927…` ~~~~text 90: PHASE LAZN13_D23 % 2 1 13 ! 91: CONST LAZN13_D23 : LA : ZN : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): LAZN13_D23, type code %, sha256 `e38dcc486f44a268…` ~~~~text 96: PHASE LAZN13_D23 % 2 1 13 ! 97: CONST LAZN13_D23 : LA : ZN : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.tca.2011.05.001](https://doi.org/10.1016/j.tca.2011.05.001) A. Berche, P. Benigni, J. Rogez, M.C. Record, New experimental investigation of the lanthanum zinc phase diagram, Thermochimica Acta 523, 70-78 (2011). _cited as the source of values for this phase_ - [doi:10.1016/0022-5088(67)90001-x](https://doi.org/10.1016/0022-5088%2867%2990001-x) A. Iandelli, A. Palenzona, Zinc-rich phases of the rare-earth-zinc alloys, Journal of the Less Common Metals 12, 333-343 (1967). _cited as the source of values for this phase_ ## LAZN2 (La–Zn) - Id: `phase:la-zn:lazn2`; 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: La 0.3333, Zn 0.6667 - Stability: stable in 2 of 2 calculated diagram(s): 300–1121.96 K, x(Zn) 0.66667–0.66667 - Literature: 13 values (13 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:lazn2) Names (5): _corpus: _corpus:phase:la-zn:lazn2 _paper: _paper:10.1016/j.calphad.2011.11.004:LaZn2, paper:10.1016/j.jallcom.2010.03.062:LaZn2 _tdb: _tdb:LaZn-10Qi.tdb:LAZN2, tdb:LaZn-12Ber.tdb:LAZN2 ### TDB models of LAZN2 (2): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): LAZN2, type code %, sha256 `97c5cfdc1bfd8927…` ~~~~text 60: PHASE LAZN2 % 2 1 2 ! 61: CONST LAZN2 : LA : ZN : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): LAZN2, type code %, sha256 `e38dcc486f44a268…` ~~~~text 61: PHASE LAZN2 % 2 1 2 ! 62: CONST LAZN2 : LA : ZN : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.tca.2011.05.001](https://doi.org/10.1016/j.tca.2011.05.001) A. Berche, P. Benigni, J. Rogez, M.C. Record, New experimental investigation of the lanthanum zinc phase diagram, Thermochimica Acta 523, 70-78 (2011). _cited as the source of values for this phase_ ## LAZN4 (La–Zn) - Id: `phase:la-zn:lazn4`; status `assigned` - Structure: LaZn4 · oC20 · Cmcm (63); type `st:lazn4-oc20`; 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_63_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: La 0.2000, Zn 0.8000 - Stability: stable in 2 of 2 calculated diagram(s): 300–1138.82 K, x(Zn) 0.8–0.8 - Literature: 9 values (9 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:lazn4) Names (5): _corpus: _corpus:phase:la-zn:lazn4 _paper: _paper:10.1016/j.calphad.2011.11.004:LaZn4, paper:10.1016/j.jallcom.2010.03.062:LaZn4 _tdb: _tdb:LaZn-10Qi.tdb:LAZN4, tdb:LaZn-12Ber.tdb:LAZN4 ### TDB models of LAZN4 (2): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): LAZN4, type code %, sha256 `97c5cfdc1bfd8927…` ~~~~text 65: PHASE LAZN4 % 2 1 4 ! 66: CONST LAZN4 : LA : ZN : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): LAZN4, type code %, sha256 `e38dcc486f44a268…` ~~~~text 66: PHASE LAZN4 % 2 1 4 ! 67: CONST LAZN4 : LA : ZN : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.tca.2011.05.001](https://doi.org/10.1016/j.tca.2011.05.001) A. Berche, P. Benigni, J. Rogez, M.C. Record, New experimental investigation of the lanthanum zinc phase diagram, Thermochimica Acta 523, 70-78 (2011). _cited as the source of values for this phase_ ## LAZN5_D2D (La–Zn) - Id: `phase:la-zn:lazn5-d2d`; status `assigned` - Structure: CaCu5 · D2_d · hP6 · P6/mmm (191); type `st:d2-d-cacu5-hp6`; tier A: standard phase name; confidence high - Stoichiometry: La 0.1667, Zn 0.8333 - Stability: stable in 2 of 2 calculated diagram(s): 300–1178.38 K, x(Zn) 0.83333–0.83333 - Literature: 7 values (7 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:lazn5-d2d) Names (5): _corpus: _corpus:phase:la-zn:lazn5-d2d _paper: _paper:10.1016/j.calphad.2011.11.004:LaZn5, paper:10.1016/j.jallcom.2010.03.062:LaZn5 _tdb: _tdb:LaZn-10Qi.tdb:LAZN5_D2D, tdb:LaZn-12Ber.tdb:LAZN5_D2D ### TDB models of LAZN5_D2D (2): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): LAZN5_D2D, type code %, sha256 `97c5cfdc1bfd8927…` ~~~~text 70: PHASE LAZN5_D2D % 2 1 5 ! 71: CONST LAZN5_D2D : LA : ZN : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): LAZN5_D2D, type code %, sha256 `e38dcc486f44a268…` ~~~~text 71: PHASE LAZN5_D2D % 2 1 5 ! 72: CONST LAZN5_D2D : LA : ZN : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.tca.2011.05.001](https://doi.org/10.1016/j.tca.2011.05.001) A. Berche, P. Benigni, J. Rogez, M.C. Record, New experimental investigation of the lanthanum zinc phase diagram, Thermochimica Acta 523, 70-78 (2011). _cited as the source of values for this phase_ ## LAZN7 (La–Zn) - Id: `phase:la-zn:lazn7`; status `needs_review` - No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete - Candidate (literature_printed): (LaZn7) · ? — printed with a label mapped to this phase - Candidate (sgte_mmc2): (LaZn7) — Hallstedt 2025 mmc2 row for LAZN7: LaZn7 - Stoichiometry: La 0.1250, Zn 0.8750 - Stability: stable in 1 of 1 calculated diagram(s): 300–1213.35 K, x(Zn) 0.875–0.875 - Literature: 2 values (2 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:lazn7) Names (3): _corpus: _corpus:phase:la-zn:lazn7 _paper: _paper:10.1016/j.calphad.2011.11.004:LaZn7 _tdb: _tdb:LaZn-12Ber.tdb:LAZN7 ### TDB models of LAZN7 (1): PHASE and CONSTITUENT statements as written [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): LAZN7, type code %, sha256 `e38dcc486f44a268…` ~~~~text 76: PHASE LAZN7 % 2 1 7 ! 77: CONST LAZN7 : LA : ZN : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase; reports values for this phase_ ## LIQUID (La–Zn) - Id: `phase:la-zn:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 2 of 2 calculated diagram(s): 692.67–2500 K, x(Zn) 0–1 - Literature: 48 values (48 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:la-zn:liquid) Names (6): _corpus: _corpus:phase:la-zn:liquid _paper: _paper:10.1016/j.calphad.2011.11.004:Liquid, paper:10.1016/j.calphad.2011.11.004:liquid, paper:10.1016/j.jallcom.2010.03.062:L _tdb: _tdb:LaZn-10Qi.tdb:LIQUID, tdb:LaZn-12Ber.tdb:LIQUID ### TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written [LaZn-10Qi.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-10Qi.tdb): LIQUID, type code %, sha256 `97c5cfdc1bfd8927…` ~~~~text 25: PHASE LIQUID:L % 1 1 ! 26: CONST LIQUID:L : LA ZN : ! ~~~~ [LaZn-12Ber.tdb](https://orchid-project.org/data/databases/sgte-binary/LaZn-12Ber.tdb): LIQUID, type code %, sha256 `e38dcc486f44a268…` ~~~~text 31: PHASE LIQUID:L % 1 1 ! 32: CONST LIQUID:L : LA ZN : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.calphad.2011.11.004](https://doi.org/10.1016/j.calphad.2011.11.004) Alexandre Berche, Pierre Benigni, Jacques Rogez, Marie-Christine Record, Thermodynamic assessment of the La–Zn system, Calphad 36, 65-70 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2010.03.062](https://doi.org/10.1016/j.jallcom.2010.03.062) H.Y. Qi, G.X. Huang, R.D. Liu, K. Zhang, L.B. Liu, Z.P. Jin, Thermodynamic optimization of La–Zn and La–Mg–Zn systems, Journal of Alloys and Compounds 497, 336-343 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.tca.2011.05.001](https://doi.org/10.1016/j.tca.2011.05.001) A. Berche, P. Benigni, J. Rogez, M.C. Record, New experimental investigation of the lanthanum zinc phase diagram, Thermochimica Acta 523, 70-78 (2011). _cited as the source of values for this phase_ - [doi:10.1016/0022-5088(67)90001-x](https://doi.org/10.1016/0022-5088%2867%2990001-x) A. Iandelli, A. Palenzona, Zinc-rich phases of the rare-earth-zinc alloys, Journal of the Less Common Metals 12, 333-343 (1967). _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).