Pt–Sb phases

11 phases (tier A 8, tier B 1, tier C 1, liquid 1); 9 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 · Pt–Sb system page · Markdown · field reference

Phases of the Pt–Sb system (11)
Phase	Structure	Basis	Stability (calculated)	TDB models
RHOMBOHEDRAL_A7 phase:pt-sb:a7-rhombohedral	alpha-As · A7 · hR2 · R-3m (166)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–903.78 K, x(Sb) 1–1	1
BCC_A2 phase:pt-sb:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
FCC_A1 phase:pt-sb:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2041.5 K, x(Sb) 0–0.104	1
HCP_A3 phase:pt-sb:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
LIQUID phase:pt-sb:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 899.48–2500 K, x(Sb) 0–1	1
PT3SB_D023 phase:pt-sb:pt3sb-d023	Al3Zr · D0_23 · tI16 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–947.85 K, x(Sb) 0.25–0.25	1
PT3SB2 phase:pt-sb:pt3sb2	Pt3Sb2 · oI20 · Ibam (72)	tier B: DFT-supported (unique MP + OQMD match)	stable in 1 of 1 calculated diagram(s): 300–1012.04 K, x(Sb) 0.4–0.4	1
PT5SB_L12 phase:pt-sb:pt5sb-l12	AuCu3 · L1_2 · cP4 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 832.97–1020.89 K, x(Sb) 0.15292–0.18524	1
PT7SB phase:pt-sb:pt7sb	CuPt7 · cF32 · Fm-3m (225)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–898.06 K, x(Sb) 0.125–0.125	1
PTSB_B81 phase:pt-sb:ptsb-b81	NiAs · B8_1 · hP4 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1319.01 K, x(Sb) 0.5–0.5	1
PTSB2_C2 phase:pt-sb:ptsb2-c2	beta-FeS2 · C2 · cP12 · Pa-3 (205)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1497.58 K, x(Sb) 0.66667–0.66667	1

RHOMBOHEDRAL_A7 (Pt–Sb)

Id: phase:pt-sb:a7-rhombohedral; status assigned
Structure: alpha-As · A7 · hR2 · R-3m (166); type st:a7-alpha-as-hr2; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–903.78 K, x(Sb) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-sb:a7-rhombohedral
tdb: tdb:PtSb-14Guo.tdb:RHOMBOHEDRAL_A7

TDB models of RHOMBOHEDRAL_A7 (1): PHASE and CONSTITUENT statements as written

PtSb-14Guo.tdb: RHOMBOHEDRAL_A7, type code %, sha256 e4786997c3df9ae3…

42: PHASE RHOMBOHEDRAL_A7 % 1 1 !
43: CONST RHOMBOHEDRAL_A7 : PT SB% : !

Example references (1 of 1; assessments first):

doi:10.3139/146.111072 C. Guo, C. Li, S. Shang, Z. Du, Int. J. Mater. Res, 105, 525-36(2014).
assessment that models this phase

BCC_A2 (Pt–Sb)

Id: phase:pt-sb: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

Names (2): corpus: corpus:phase:pt-sb:bcc-a2
tdb: tdb:PtSb-14Guo.tdb:BCC_A2

TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

PtSb-14Guo.tdb: BCC_A2, type code %B, sha256 e4786997c3df9ae3…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : PT SB : VA : !

Example references (1 of 1; assessments first):

doi:10.3139/146.111072 C. Guo, C. Li, S. Shang, Z. Du, Int. J. Mater. Res, 105, 525-36(2014).
assessment that models this phase

FCC_A1 (Pt–Sb)

Id: phase:pt-sb: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 1 of 1 calculated diagram(s): 300–2041.5 K, x(Sb) 0–0.104
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-sb:fcc-a1
tdb: tdb:PtSb-14Guo.tdb:FCC_A1

TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

PtSb-14Guo.tdb: FCC_A1, type code %A, sha256 e4786997c3df9ae3…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : PT% SB : VA : !

Example references (1 of 1; assessments first):

doi:10.3139/146.111072 C. Guo, C. Li, S. Shang, Z. Du, Int. J. Mater. Res, 105, 525-36(2014).
assessment that models this phase

HCP_A3 (Pt–Sb)

Id: phase:pt-sb: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: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-sb:hcp-a3
tdb: tdb:PtSb-14Guo.tdb:HCP_A3

TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

PtSb-14Guo.tdb: HCP_A3, type code %A, sha256 e4786997c3df9ae3…

37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : PT SB : VA : !

Example references (1 of 1; assessments first):

doi:10.3139/146.111072 C. Guo, C. Li, S. Shang, Z. Du, Int. J. Mater. Res, 105, 525-36(2014).
assessment that models this phase

LIQUID (Pt–Sb)

Id: phase:pt-sb:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 899.48–2500 K, x(Sb) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-sb:liquid
tdb: tdb:PtSb-14Guo.tdb:LIQUID

TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written

PtSb-14Guo.tdb: LIQUID, type code %, sha256 e4786997c3df9ae3…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : PT SB : !

Example references (1 of 1; assessments first):

doi:10.3139/146.111072 C. Guo, C. Li, S. Shang, Z. Du, Int. J. Mater. Res, 105, 525-36(2014).
assessment that models this phase

PT3SB_D023 (Pt–Sb)

Id: phase:pt-sb:pt3sb-d023; status assigned
Structure: Al3Zr · D0_23 · tI16 · I4/mmm (139); type st:d0-23-al3zr-ti16; tier A: standard phase name; confidence high
Stoichiometry: Pt 0.7500, Sb 0.2500
Stability: stable in 1 of 1 calculated diagram(s): 300–947.85 K, x(Sb) 0.25–0.25
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-sb:pt3sb-d023
tdb: tdb:PtSb-14Guo.tdb:PT3SB_D023

TDB models of PT3SB_D023 (1): PHASE and CONSTITUENT statements as written

PtSb-14Guo.tdb: PT3SB_D023, type code %, sha256 e4786997c3df9ae3…

57: PHASE PT3SB_D023 % 2 3 1 !
58: CONST PT3SB_D023 : PT : SB : !

Example references (1 of 1; assessments first):

doi:10.3139/146.111072 C. Guo, C. Li, S. Shang, Z. Du, Int. J. Mater. Res, 105, 525-36(2014).
assessment that models this phase

PT3SB2 (Pt–Sb)

Id: phase:pt-sb:pt3sb2; status assigned
Structure: Pt3Sb2 · oI20 · Ibam (72); type st:pt3sb2-oi20; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Pt 0.6000, Sb 0.4000
Stability: stable in 1 of 1 calculated diagram(s): 300–1012.04 K, x(Sb) 0.4–0.4
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:pt-sb:pt3sb2
mp: mp:mp-aaaaaxeh
oqmd: oqmd:oqmd-7877
tdb: tdb:PtSb-14Guo.tdb:PT3SB2

TDB models of PT3SB2 (1): PHASE and CONSTITUENT statements as written

PtSb-14Guo.tdb: PT3SB2, type code %, sha256 e4786997c3df9ae3…

62: PHASE PT3SB2 % 2 3 2 !
63: CONST PT3SB2 : PT : SB : !

Example references (1 of 1; assessments first):

doi:10.3139/146.111072 C. Guo, C. Li, S. Shang, Z. Du, Int. J. Mater. Res, 105, 525-36(2014).
assessment that models this phase

PT5SB_L12 (Pt–Sb)

Id: phase:pt-sb:pt5sb-l12; status assigned
Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type st:l1-2-aucu3-cp4; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in PtSb-14Guo.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 832.97–1020.89 K, x(Sb) 0.15292–0.18524
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-sb:pt5sb-l12
tdb: tdb:PtSb-14Guo.tdb:PT5SB_L12

TDB models of PT5SB_L12 (1): PHASE and CONSTITUENT statements as written

PtSb-14Guo.tdb: PT5SB_L12, type code %, sha256 e4786997c3df9ae3…

52: PHASE PT5SB_L12 % 2 5 1 !
53: CONST PT5SB_L12 : PT% SB : PT SB% : !

Example references (1 of 1; assessments first):

doi:10.3139/146.111072 C. Guo, C. Li, S. Shang, Z. Du, Int. J. Mater. Res, 105, 525-36(2014).
assessment that models this phase

PT7SB (Pt–Sb)

Id: phase:pt-sb:pt7sb; status assigned
Structure: CuPt7 · cF32 · Fm-3m (225); type st:cupt7-cf32; 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_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Pt 0.8750, Sb 0.1250
Stability: stable in 1 of 1 calculated diagram(s): 300–898.06 K, x(Sb) 0.125–0.125
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-sb:pt7sb
tdb: tdb:PtSb-14Guo.tdb:PT7SB

TDB models of PT7SB (1): PHASE and CONSTITUENT statements as written

PtSb-14Guo.tdb: PT7SB, type code %, sha256 e4786997c3df9ae3…

47: PHASE PT7SB % 2 7 1 !
48: CONST PT7SB : PT : SB : !

Example references (1 of 1; assessments first):

doi:10.3139/146.111072 C. Guo, C. Li, S. Shang, Z. Du, Int. J. Mater. Res, 105, 525-36(2014).
assessment that models this phase

PTSB_B81 (Pt–Sb)

Id: phase:pt-sb:ptsb-b81; status assigned
Structure: NiAs · B8_1 · hP4 · P6_3/mmc (194); type st:b8-1-nias-hp4; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaaefl and oqmd-3649, space group 194
Stoichiometry: Pt 0.5000, Sb 0.5000
Stability: stable in 1 of 1 calculated diagram(s): 300–1319.01 K, x(Sb) 0.5–0.5
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:pt-sb:ptsb-b81
mp: mp:mp-aaaaaefl
oqmd: oqmd:oqmd-3649
tdb: tdb:PtSb-14Guo.tdb:PTSB_B81

TDB models of PTSB_B81 (1): PHASE and CONSTITUENT statements as written

PtSb-14Guo.tdb: PTSB_B81, type code %, sha256 e4786997c3df9ae3…

67: PHASE PTSB_B81 % 2 1 1 !
68: CONST PTSB_B81 : PT : SB : !

Example references (1 of 1; assessments first):

doi:10.3139/146.111072 C. Guo, C. Li, S. Shang, Z. Du, Int. J. Mater. Res, 105, 525-36(2014).
assessment that models this phase

PTSB2_C2 (Pt–Sb)

Id: phase:pt-sb:ptsb2-c2; status assigned
Structure: beta-FeS2 · C2 · cP12 · Pa-3 (205); type st:c2-beta-fes2-cp12; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaaavq and oqmd-7991, space group 205
Stoichiometry: Pt 0.3333, Sb 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–1497.58 K, x(Sb) 0.66667–0.66667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:pt-sb:ptsb2-c2
mp: mp:mp-aaaaaavq
oqmd: oqmd:oqmd-7991
tdb: tdb:PtSb-14Guo.tdb:PTSB2_C2

TDB models of PTSB2_C2 (1): PHASE and CONSTITUENT statements as written

PtSb-14Guo.tdb: PTSB2_C2, type code %, sha256 e4786997c3df9ae3…

72: PHASE PTSB2_C2 % 2 1 2 !
73: CONST PTSB2_C2 : PT : SB : !

Example references (1 of 1; assessments first):

doi:10.3139/146.111072 C. Guo, C. Li, S. Shang, Z. Du, Int. J. Mater. Res, 105, 525-36(2014).
assessment that models 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). doi: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). doi: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.

@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}
}