# Lu–Pb phases > Lu–Pb system: 10 phases (tier A 4, tier C 2, liquid 2, needs_review 2); 8 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/LU-PB.html · Markdown: https://data.orchid-project.org/phases/pages/LU-PB.md 10 phases (tier A 4, tier C 2, liquid 2, needs_review 2); 8 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=LU-PB) · [full JSON](https://data.orchid-project.org/phases/systems/LU-PB.json) · [Lu–Pb system page](https://data.orchid-project.org/systems/LU-PB.html) · [Markdown](https://data.orchid-project.org/phases/pages/LU-PB.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Lu–Pb system (10) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [ASSOCI](#phase-lu-pb-associ); _phase:lu-pb:associ_ | liquid | liquid | not stable in 1 calculated diagram(s) | 0 | 1 | | [BCC_A2](#phase-lu-pb-bcc-a2); _phase:lu-pb:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 2 | | [FCC_A1](#phase-lu-pb-fcc-a1); _phase:lu-pb:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2499.36 K, x(Pb) 1–1 | 2 | 2 | | [HCP_A3](#phase-lu-pb-hcp-a3); _phase:lu-pb:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1983.38 K, x(Pb) 0–0.01182 | 4 | 2 | | [LIQUID](#phase-lu-pb-liquid); _phase:lu-pb:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 595.96–2500 K, x(Pb) 0–1 | 28 | 2 | | [LU5PB3_D88](#phase-lu-pb-lu5pb3-d88); _phase:lu-pb:lu5pb3-d88_ | Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1967.22 K, x(Pb) 0.375–0.375 | 14 | 2 | | [LU5PB4_HT](#phase-lu-pb-lu5pb4-ht); _phase:lu-pb:lu5pb4-ht_ | | needs_review | stable in 2 of 2 calculated diagram(s): 1747.98–1772.79 K, x(Pb) 0.44444–0.44444 | 8 | 2 | | [LU5PB4_LT](#phase-lu-pb-lu5pb4-lt); _phase:lu-pb:lu5pb4-lt_ | | needs_review | stable in 2 of 2 calculated diagram(s): 300–1749.54 K, x(Pb) 0.44444–0.44444 | 10 | 2 | | [LU6PB5](#phase-lu-pb-lu6pb5); _phase:lu-pb:lu6pb5_ | Si5V6 · oI44 · Ibam (72) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1445.91 K, x(Pb) 0.45455–0.45455 | 8 | 2 | | [LUPB2](#phase-lu-pb-lupb2); _phase:lu-pb:lupb2_ | CuZr2 · tI6 · I4/mmm (139) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–845.22 K, x(Pb) 0.66667–0.66667 | 8 | 2 | ## ASSOCI (Lu–Pb) - Id: `phase:lu-pb:associ`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; 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:lu-pb:associ) Names (2): _corpus: _corpus:phase:lu-pb:associ _tdb: _tdb:LuPb-12Idd.tdb:ASSOCI ### TDB models of ASSOCI (1): PHASE and CONSTITUENT statements as written [LuPb-12Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-12Idd.tdb): ASSOCI, type code %, sha256 `33e63b676c5f908f…` ~~~~text 35: PHASE ASSOCI:L % 1 1 ! 36: CONST ASSOCI:L : LU LU5PB3 PB : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1007/s10973-011-1881-2](https://doi.org/10.1007/s10973-011-1881-2) A. Iddaoudi, N. Selhaoui, M. Ait Amar, K. Mahdouk, A. Aharoune, L. Bouirden, Thermodynamic description of the Lu–Pb binary system, J Therm Anal Calorim 110, 923-928 (2012). _assessment that models this phase_ ## BCC_A2 (Lu–Pb) - Id: `phase:lu-pb:bcc-a2`; status `assigned` - Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high - Stoichiometry: Pb 1.0000 - Stability: not stable in 2 calculated diagram(s) - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-pb:bcc-a2) Names (3): _corpus: _corpus:phase:lu-pb:bcc-a2 _tdb: _tdb:LuPb-12Idd.tdb:BCC_A2, tdb:LuPb-13Wan.tdb:BCC_A2 ### TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written [LuPb-12Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-12Idd.tdb): BCC_A2, type code %B, sha256 `33e63b676c5f908f…` ~~~~text 45: PHASE BCC_A2 %B 2 1 3 ! 46: CONST BCC_A2 : PB : VA : ! ~~~~ [LuPb-13Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-13Wan.tdb): BCC_A2, type code %B, sha256 `602dc6f7866693ae…` ~~~~text 40: PHASE BCC_A2 %B 2 1 3 ! 41: CONST BCC_A2 : PB : VA : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1007/s10973-011-1881-2](https://doi.org/10.1007/s10973-011-1881-2) A. Iddaoudi, N. Selhaoui, M. Ait Amar, K. Mahdouk, A. Aharoune, L. Bouirden, Thermodynamic description of the Lu–Pb binary system, J Therm Anal Calorim 110, 923-928 (2012). _assessment that models this phase_ - [doi:10.1016/j.calphad.2013.01.007](https://doi.org/10.1016/j.calphad.2013.01.007) D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013). _assessment that models this phase_ ## FCC_A1 (Lu–Pb) - Id: `phase:lu-pb: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): 300–2499.36 K, x(Pb) 1–1 - Literature: 2 values (2 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-pb:fcc-a1) Names (4): _corpus: _corpus:phase:lu-pb:fcc-a1 _paper: _paper:10.1016/j.calphad.2013.01.007:(Pb) _tdb: _tdb:LuPb-12Idd.tdb:FCC_A1, tdb:LuPb-13Wan.tdb:FCC_A1 ### TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written [LuPb-12Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-12Idd.tdb): FCC_A1, type code %A, sha256 `33e63b676c5f908f…` ~~~~text 40: PHASE FCC_A1 %A 2 1 1 ! 41: CONST FCC_A1 : PB : VA : ! ~~~~ [LuPb-13Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-13Wan.tdb): FCC_A1, type code %A, sha256 `602dc6f7866693ae…` ~~~~text 35: PHASE FCC_A1 %A 2 1 1 ! 36: CONST FCC_A1 : LU PB% : VA : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1016/j.calphad.2013.01.007](https://doi.org/10.1016/j.calphad.2013.01.007) D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013). _assessment that models this phase; reports values for this phase_ - [doi:10.1007/s10973-011-1881-2](https://doi.org/10.1007/s10973-011-1881-2) A. Iddaoudi, N. Selhaoui, M. Ait Amar, K. Mahdouk, A. Aharoune, L. Bouirden, Thermodynamic description of the Lu–Pb binary system, J Therm Anal Calorim 110, 923-928 (2012). _assessment that models this phase_ - [doi:10.1016/0022-5088(69)90179-9](https://doi.org/10.1016/0022-5088%2869%2990179-9) O.D. McMasters, K.A. Gschneidner, The lutetium-lead system, Journal of the Less Common Metals 19, 337-344 (1969). _cited as the source of values for this phase_ ## HCP_A3 (Lu–Pb) - Id: `phase:lu-pb: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): 300–1983.38 K, x(Pb) 0–0.01182 - Literature: 4 values (4 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-pb:hcp-a3) Names (5): _corpus: _corpus:phase:lu-pb:hcp-a3 _paper: _paper:10.1007/s10973-011-1881-2:(Lu), paper:10.1016/j.calphad.2013.01.007:(Lu) _tdb: _tdb:LuPb-12Idd.tdb:HCP_A3, tdb:LuPb-13Wan.tdb:HCP_A3 ### TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written [LuPb-12Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-12Idd.tdb): HCP_A3, type code %A, sha256 `33e63b676c5f908f…` ~~~~text 50: PHASE HCP_A3 %A 2 1 0.5 ! 51: CONST HCP_A3 : LU% PB : VA : ! ~~~~ [LuPb-13Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-13Wan.tdb): HCP_A3, type code %A, sha256 `602dc6f7866693ae…` ~~~~text 45: PHASE HCP_A3 %A 2 1 0.5 ! 46: CONST HCP_A3 : LU% PB : VA : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/s10973-011-1881-2](https://doi.org/10.1007/s10973-011-1881-2) A. Iddaoudi, N. Selhaoui, M. Ait Amar, K. Mahdouk, A. Aharoune, L. Bouirden, Thermodynamic description of the Lu–Pb binary system, J Therm Anal Calorim 110, 923-928 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2013.01.007](https://doi.org/10.1016/j.calphad.2013.01.007) D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90179-9](https://doi.org/10.1016/0022-5088%2869%2990179-9) O.D. McMasters, K.A. Gschneidner, The lutetium-lead system, Journal of the Less Common Metals 19, 337-344 (1969). _cited as the source of values for this phase_ ## LIQUID (Lu–Pb) - Id: `phase:lu-pb:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 2 of 2 calculated diagram(s): 595.96–2500 K, x(Pb) 0–1 - Literature: 28 values (28 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-pb:liquid) Names (5): _corpus: _corpus:phase:lu-pb:liquid _paper: _paper:10.1007/s10973-011-1881-2:Liq, paper:10.1016/j.calphad.2013.01.007:L _tdb: _tdb:LuPb-12Idd.tdb:LIQUID, tdb:LuPb-13Wan.tdb:LIQUID ### TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written [LuPb-12Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-12Idd.tdb): LIQUID, type code %, sha256 `33e63b676c5f908f…` ~~~~text 32: PHASE LIQUID:L % 1 1 ! 33: CONST LIQUID:L : LU PB : ! ~~~~ [LuPb-13Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-13Wan.tdb): LIQUID, type code %, sha256 `602dc6f7866693ae…` ~~~~text 30: PHASE LIQUID:L % 1 1 ! 31: CONST LIQUID:L : LU PB : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/s10973-011-1881-2](https://doi.org/10.1007/s10973-011-1881-2) A. Iddaoudi, N. Selhaoui, M. Ait Amar, K. Mahdouk, A. Aharoune, L. Bouirden, Thermodynamic description of the Lu–Pb binary system, J Therm Anal Calorim 110, 923-928 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2013.01.007](https://doi.org/10.1016/j.calphad.2013.01.007) D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90179-9](https://doi.org/10.1016/0022-5088%2869%2990179-9) O.D. McMasters, K.A. Gschneidner, The lutetium-lead system, Journal of the Less Common Metals 19, 337-344 (1969). _cited as the source of values for this phase_ ## LU5PB3_D88 (Lu–Pb) - Id: `phase:lu-pb:lu5pb3-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 - Caveat: DFT agrees: on-hull mp-aaackxxn and oqmd-30697, space group 193 - Stoichiometry: Lu 0.6250, Pb 0.3750 - Stability: stable in 2 of 2 calculated diagram(s): 300–1967.22 K, x(Pb) 0.375–0.375 - Literature: 14 values (14 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-pb:lu5pb3-d88) Names (7): _corpus: _corpus:phase:lu-pb:lu5pb3-d88 _mp: _mp:mp-aaackxxn _oqmd: _oqmd:oqmd-30697 _paper: _paper:10.1007/s10973-011-1881-2:Lu5Pb3, paper:10.1016/j.calphad.2013.01.007:Lu5Pb3 _tdb: _tdb:LuPb-12Idd.tdb:LU5PB3_D88, tdb:LuPb-13Wan.tdb:LU5PB3_D88 ### TDB models of LU5PB3_D88 (2): PHASE and CONSTITUENT statements as written [LuPb-12Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-12Idd.tdb): LU5PB3_D88, type code %, sha256 `33e63b676c5f908f…` ~~~~text 55: PHASE LU5PB3_D88 % 2 5 3 ! 56: CONST LU5PB3_D88 : LU : PB : ! ~~~~ [LuPb-13Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-13Wan.tdb): LU5PB3_D88, type code %, sha256 `602dc6f7866693ae…` ~~~~text 50: PHASE LU5PB3_D88 % 2 5 3 ! 51: CONST LU5PB3_D88 : LU : PB : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/s10973-011-1881-2](https://doi.org/10.1007/s10973-011-1881-2) A. Iddaoudi, N. Selhaoui, M. Ait Amar, K. Mahdouk, A. Aharoune, L. Bouirden, Thermodynamic description of the Lu–Pb binary system, J Therm Anal Calorim 110, 923-928 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2013.01.007](https://doi.org/10.1016/j.calphad.2013.01.007) D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90179-9](https://doi.org/10.1016/0022-5088%2869%2990179-9) O.D. McMasters, K.A. Gschneidner, The lutetium-lead system, Journal of the Less Common Metals 19, 337-344 (1969). _cited as the source of values for this phase_ ## LU5PB4_HT (Lu–Pb) - Id: `phase:lu-pb:lu5pb4-ht`; status `needs_review` - No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition - Candidate (sgte_mmc2): (Lu5Pb4-ht) — Hallstedt 2025 mmc2 row for LU5PB4_HT: Lu5Pb4-ht - Stoichiometry: Lu 0.5556, Pb 0.4444 - Stability: stable in 2 of 2 calculated diagram(s): 1747.98–1772.79 K, x(Pb) 0.44444–0.44444 - Literature: 8 values (8 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-pb:lu5pb4-ht) Names (5): _corpus: _corpus:phase:lu-pb:lu5pb4-ht _paper: _paper:10.1007/s10973-011-1881-2:βLu5Pb4, paper:10.1016/j.calphad.2013.01.007:βLu5Pb4 _tdb: _tdb:LuPb-12Idd.tdb:LU5PB4_HT, tdb:LuPb-13Wan.tdb:LU5PB4_HT ### TDB models of LU5PB4_HT (2): PHASE and CONSTITUENT statements as written [LuPb-12Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-12Idd.tdb): LU5PB4_HT, type code %, sha256 `33e63b676c5f908f…` ~~~~text 65: PHASE LU5PB4_HT % 2 5 4 ! 66: CONST LU5PB4_HT : LU : PB : ! ~~~~ [LuPb-13Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-13Wan.tdb): LU5PB4_HT, type code %, sha256 `602dc6f7866693ae…` ~~~~text 60: PHASE LU5PB4_HT % 2 5 4 ! 61: CONST LU5PB4_HT : LU : PB : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/s10973-011-1881-2](https://doi.org/10.1007/s10973-011-1881-2) A. Iddaoudi, N. Selhaoui, M. Ait Amar, K. Mahdouk, A. Aharoune, L. Bouirden, Thermodynamic description of the Lu–Pb binary system, J Therm Anal Calorim 110, 923-928 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2013.01.007](https://doi.org/10.1016/j.calphad.2013.01.007) D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90179-9](https://doi.org/10.1016/0022-5088%2869%2990179-9) O.D. McMasters, K.A. Gschneidner, The lutetium-lead system, Journal of the Less Common Metals 19, 337-344 (1969). _cited as the source of values for this phase_ ## LU5PB4_LT (Lu–Pb) - Id: `phase:lu-pb:lu5pb4-lt`; status `needs_review` - No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition - Candidate (sgte_mmc2): (Lu5Pb4-lt) — Hallstedt 2025 mmc2 row for LU5PB4_LT: Lu5Pb5-lt - Stoichiometry: Lu 0.5556, Pb 0.4444 - Stability: stable in 2 of 2 calculated diagram(s): 300–1749.54 K, x(Pb) 0.44444–0.44444 - Literature: 10 values (10 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-pb:lu5pb4-lt) Names (5): _corpus: _corpus:phase:lu-pb:lu5pb4-lt _paper: _paper:10.1007/s10973-011-1881-2:αLu5Pb4, paper:10.1016/j.calphad.2013.01.007:αLu5Pb4 _tdb: _tdb:LuPb-12Idd.tdb:LU5PB4_LT, tdb:LuPb-13Wan.tdb:LU5PB4_LT ### TDB models of LU5PB4_LT (2): PHASE and CONSTITUENT statements as written [LuPb-12Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-12Idd.tdb): LU5PB4_LT, type code %, sha256 `33e63b676c5f908f…` ~~~~text 60: PHASE LU5PB4_LT % 2 5 4 ! 61: CONST LU5PB4_LT : LU : PB : ! ~~~~ [LuPb-13Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-13Wan.tdb): LU5PB4_LT, type code %, sha256 `602dc6f7866693ae…` ~~~~text 55: PHASE LU5PB4_LT % 2 5 4 ! 56: CONST LU5PB4_LT : LU : PB : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/s10973-011-1881-2](https://doi.org/10.1007/s10973-011-1881-2) A. Iddaoudi, N. Selhaoui, M. Ait Amar, K. Mahdouk, A. Aharoune, L. Bouirden, Thermodynamic description of the Lu–Pb binary system, J Therm Anal Calorim 110, 923-928 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2013.01.007](https://doi.org/10.1016/j.calphad.2013.01.007) D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90179-9](https://doi.org/10.1016/0022-5088%2869%2990179-9) O.D. McMasters, K.A. Gschneidner, The lutetium-lead system, Journal of the Less Common Metals 19, 337-344 (1969). _cited as the source of values for this phase_ ## LU6PB5 (Lu–Pb) - Id: `phase:lu-pb:lu6pb5`; status `assigned` - Structure: Si5V6 · oI44 · Ibam (72); type `st:si5v6-oi44`; 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: Lu 0.5455, Pb 0.4545 - Stability: stable in 2 of 2 calculated diagram(s): 300–1445.91 K, x(Pb) 0.45455–0.45455 - Literature: 8 values (8 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-pb:lu6pb5) Names (5): _corpus: _corpus:phase:lu-pb:lu6pb5 _paper: _paper:10.1007/s10973-011-1881-2:Lu6Pb5, paper:10.1016/j.calphad.2013.01.007:Lu6Pb5 _tdb: _tdb:LuPb-12Idd.tdb:LU6PB5, tdb:LuPb-13Wan.tdb:LU6PB5 ### TDB models of LU6PB5 (2): PHASE and CONSTITUENT statements as written [LuPb-12Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-12Idd.tdb): LU6PB5, type code %, sha256 `33e63b676c5f908f…` ~~~~text 70: PHASE LU6PB5 % 2 6 5 ! 71: CONST LU6PB5 : LU : PB : ! ~~~~ [LuPb-13Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-13Wan.tdb): LU6PB5, type code %, sha256 `602dc6f7866693ae…` ~~~~text 65: PHASE LU6PB5 % 2 6 5 ! 66: CONST LU6PB5 : LU : PB : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/s10973-011-1881-2](https://doi.org/10.1007/s10973-011-1881-2) A. Iddaoudi, N. Selhaoui, M. Ait Amar, K. Mahdouk, A. Aharoune, L. Bouirden, Thermodynamic description of the Lu–Pb binary system, J Therm Anal Calorim 110, 923-928 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2013.01.007](https://doi.org/10.1016/j.calphad.2013.01.007) D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90179-9](https://doi.org/10.1016/0022-5088%2869%2990179-9) O.D. McMasters, K.A. Gschneidner, The lutetium-lead system, Journal of the Less Common Metals 19, 337-344 (1969). _cited as the source of values for this phase_ ## LUPB2 (Lu–Pb) - Id: `phase:lu-pb:lupb2`; status `assigned` - Structure: CuZr2 · tI6 · I4/mmm (139); type `st:cuzr2-ti6`; 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: Lu 0.3333, Pb 0.6667 - Stability: stable in 2 of 2 calculated diagram(s): 300–845.22 K, x(Pb) 0.66667–0.66667 - Literature: 8 values (8 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:lu-pb:lupb2) Names (5): _corpus: _corpus:phase:lu-pb:lupb2 _paper: _paper:10.1007/s10973-011-1881-2:LuPb2, paper:10.1016/j.calphad.2013.01.007:LuPb2 _tdb: _tdb:LuPb-12Idd.tdb:LUPB2, tdb:LuPb-13Wan.tdb:LUPB2 ### TDB models of LUPB2 (2): PHASE and CONSTITUENT statements as written [LuPb-12Idd.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-12Idd.tdb): LUPB2, type code %, sha256 `33e63b676c5f908f…` ~~~~text 75: PHASE LUPB2 % 2 1 2 ! 76: CONST LUPB2 : LU : PB : ! ~~~~ [LuPb-13Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/LuPb-13Wan.tdb): LUPB2, type code %, sha256 `602dc6f7866693ae…` ~~~~text 70: PHASE LUPB2 % 2 1 2 ! 71: CONST LUPB2 : LU : PB : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1007/s10973-011-1881-2](https://doi.org/10.1007/s10973-011-1881-2) A. Iddaoudi, N. Selhaoui, M. Ait Amar, K. Mahdouk, A. Aharoune, L. Bouirden, Thermodynamic description of the Lu–Pb binary system, J Therm Anal Calorim 110, 923-928 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2013.01.007](https://doi.org/10.1016/j.calphad.2013.01.007) D. Wang, Y. Yu, X.J. Liu, C.P. Wang, Thermodynamic assessment of the Eu–Pb and Lu–Pb systems, Calphad 41, 20-25 (2013). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/0022-5088(69)90179-9](https://doi.org/10.1016/0022-5088%2869%2990179-9) O.D. McMasters, K.A. Gschneidner, The lutetium-lead system, Journal of the Less Common Metals 19, 337-344 (1969). _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).