Lu–Pb phases
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 · full JSON · Lu–Pb system page · Markdown · field reference
| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---|---|
| ASSOCI phase:lu-pb:associ | liquid | liquid | not stable in 1 calculated diagram(s) | 0 | 1 |
| 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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; statusassigned - 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
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: ASSOCI, type code %, sha256 33e63b676c5f908f…
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 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; statusassigned - 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
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: BCC_A2, type code %B, sha256 33e63b676c5f908f…
45: PHASE BCC_A2 %B 2 1 3 ! 46: CONST BCC_A2 : PB : VA : !
LuPb-13Wan.tdb: BCC_A2, type code %B, sha256 602dc6f7866693ae…
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 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 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; statusassigned - 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
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: FCC_A1, type code %A, sha256 33e63b676c5f908f…
40: PHASE FCC_A1 %A 2 1 1 ! 41: CONST FCC_A1 : PB : VA : !
LuPb-13Wan.tdb: FCC_A1, type code %A, sha256 602dc6f7866693ae…
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 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 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 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; statusassigned - 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
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: HCP_A3, type code %A, sha256 33e63b676c5f908f…
50: PHASE HCP_A3 %A 2 1 0.5 ! 51: CONST HCP_A3 : LU% PB : VA : !
LuPb-13Wan.tdb: HCP_A3, type code %A, sha256 602dc6f7866693ae…
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 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 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 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; statusassigned - 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
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: LIQUID, type code %, sha256 33e63b676c5f908f…
32: PHASE LIQUID:L % 1 1 ! 33: CONST LIQUID:L : LU PB : !
LuPb-13Wan.tdb: LIQUID, type code %, sha256 602dc6f7866693ae…
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 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 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 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; statusassigned - 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
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: LU5PB3_D88, type code %, sha256 33e63b676c5f908f…
55: PHASE LU5PB3_D88 % 2 5 3 ! 56: CONST LU5PB3_D88 : LU : PB : !
LuPb-13Wan.tdb: LU5PB3_D88, type code %, sha256 602dc6f7866693ae…
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 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 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 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; statusneeds_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
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: LU5PB4_HT, type code %, sha256 33e63b676c5f908f…
65: PHASE LU5PB4_HT % 2 5 4 ! 66: CONST LU5PB4_HT : LU : PB : !
LuPb-13Wan.tdb: LU5PB4_HT, type code %, sha256 602dc6f7866693ae…
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 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 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 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; statusneeds_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
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: LU5PB4_LT, type code %, sha256 33e63b676c5f908f…
60: PHASE LU5PB4_LT % 2 5 4 ! 61: CONST LU5PB4_LT : LU : PB : !
LuPb-13Wan.tdb: LU5PB4_LT, type code %, sha256 602dc6f7866693ae…
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 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 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 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; statusassigned - 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
- 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
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: LU6PB5, type code %, sha256 33e63b676c5f908f…
70: PHASE LU6PB5 % 2 6 5 ! 71: CONST LU6PB5 : LU : PB : !
LuPb-13Wan.tdb: LU6PB5, type code %, sha256 602dc6f7866693ae…
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 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 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 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; statusassigned - 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
- 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
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: LUPB2, type code %, sha256 33e63b676c5f908f…
75: PHASE LUPB2 % 2 1 2 ! 76: CONST LUPB2 : LU : PB : !
LuPb-13Wan.tdb: LUPB2, type code %, sha256 602dc6f7866693ae…
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 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 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 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