Pt–Zr phases

11 phases (tier A 6, tier C 2, liquid 1, needs_review 2); 11 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–Zr system page · Markdown · field reference

Phases of the Pt–Zr system (11)
Phase	Structure	Basis	Stability (calculated)	TDB models
BCC_A2 phase:pt-zr:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1099.6–2133.12 K, x(Zr) 0.92904–1	2
B2_BCC phase:pt-zr:bcc-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1099.6–2324 K, x(Zr) 0.47632–1	1
FCC_A1 phase:pt-zr:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2072.77 K, x(Zr) 0–0.14007	1
HCP_A3 phase:pt-zr:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 720–1100 K	2
D024_HCP phase:pt-zr:hcp-d024		needs_review	stable in 1 of 1 calculated diagram(s): 300–2523 K, x(Zr) 0.20598–1	1
LIQUID phase:pt-zr:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1458.12–4000 K, x(Zr) 0–1	1
PT10ZR7 phase:pt-zr:pt10zr7	Ni10Zr7 · oC68 · Cmce (64)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–2010 K, x(Zr) 0.41176–0.41176	1
PT3ZR5_D88 phase:pt-zr:pt3zr5-d88	Mn5Si3 · D8_8 · hP16 · P6_3/mcm (193)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1902.65 K, x(Zr) 0.625–0.63599	1
PT4ZR phase:pt-zr:pt4zr		needs_review	stable in 1 of 1 calculated diagram(s): 300–2152.97 K, x(Zr) 0.19471–0.2	1
PT4ZR3 phase:pt-zr:pt4zr3	Pd4Pu3 · hR14 · R-3 (148)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–2193.2 K, x(Zr) 0.42857–0.45549	1
PTZR_B33 phase:pt-zr:ptzr-b33	CrB · B33 · oC8 · Cmcm (63)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1862.98 K, x(Zr) 0.5–0.53571	1

BCC_A2 (Pt–Zr)

Id: phase:pt-zr: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 1 of 1 calculated diagram(s): 1099.6–2133.12 K, x(Zr) 0.92904–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:pt-zr:bcc-a2
tdb: tdb:PtZr-10Gao.tdb:A2_BCC, tdb:PtZr-10Gao.tdb:BCC_A2

TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written

PtZr-10Gao.tdb: A2_BCC, type code %B, sha256 3acdf8b6d62c6648…

39: PHASE A2_BCC %B 2 1 3 !
40: CONST A2_BCC : PT ZR% : VA : !

PtZr-10Gao.tdb: BCC_A2, type code %B, sha256 3acdf8b6d62c6648…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : PT ZR% : VA : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110351 Y. Gao, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 819-26(2010).
assessment that models this phase

B2_BCC (Pt–Zr)

Id: phase:pt-zr:bcc-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: PtZr-10Gao.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: partitioned order/disorder model in PtZr-10Gao.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 1099.6–2324 K, x(Zr) 0.47632–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-zr:bcc-b2
tdb: tdb:PtZr-10Gao.tdb:B2_BCC

TDB models of B2_BCC (1): PHASE and CONSTITUENT statements as written

PtZr-10Gao.tdb: B2_BCC, type code %BO, sha256 3acdf8b6d62c6648…

44: PHASE B2_BCC %BO 3 0.5 0.5 3 !
45: CONST B2_BCC : PT% ZR : PT ZR% : VA : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110351 Y. Gao, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 819-26(2010).
assessment that models this phase

FCC_A1 (Pt–Zr)

Id: phase:pt-zr: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): 300–2072.77 K, x(Zr) 0–0.14007
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-zr:fcc-a1
tdb: tdb:PtZr-10Gao.tdb:FCC_A1

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

PtZr-10Gao.tdb: FCC_A1, type code %A, sha256 3acdf8b6d62c6648…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : PT% ZR : VA : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110351 Y. Gao, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 819-26(2010).
assessment that models this phase

HCP_A3 (Pt–Zr)

Id: phase:pt-zr:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 720–1100 K
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:pt-zr:hcp-a3
tdb: tdb:PtZr-10Gao.tdb:A3_HCP, tdb:PtZr-10Gao.tdb:HCP_A3

TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written

PtZr-10Gao.tdb: A3_HCP, type code %A, sha256 3acdf8b6d62c6648…

54: PHASE A3_HCP %A 2 1 0.5 !
55: CONST A3_HCP : PT ZR% : VA : !

PtZr-10Gao.tdb: HCP_A3, type code %A, sha256 3acdf8b6d62c6648…

49: PHASE HCP_A3 %A 2 1 0.5 !
50: CONST HCP_A3 : PT ZR% : VA : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110351 Y. Gao, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 819-26(2010).
assessment that models this phase

D024_HCP (Pt–Zr)

Id: phase:pt-zr:hcp-d024; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:lattice_word_HCP_contradicts_D024; lattice_word_HCP_contradicts_D024
Candidate (dft_mp): Cmce (64) — on-hull MP Zr7Pt10 at x(ZR)=0.4118
Candidate (dft_mp): Cmcm (63) — on-hull MP ZrPt at x(ZR)=0.5000
Candidate (dft_mp): P6_3/mmc (194) — on-hull MP ZrPt3 at x(ZR)=0.2500
Candidate (dft_oqmd): Cmcm (63) — on-hull OQMD Pt1 Zr1 at x(ZR)=0.5000
Candidate (dft_oqmd): I4/mcm (140) — on-hull OQMD Pt1 Zr2 at x(ZR)=0.6667
Candidate (dft_oqmd): I-42m (121) — on-hull OQMD Pt1 Zr3 at x(ZR)=0.7500
Candidate (dft_oqmd): P63/mmc (194) — on-hull OQMD Pt3 Zr1 at x(ZR)=0.2500
Candidate (name_token): Ni3Ti · D0_24 · hP16 · P6_3/mmc (194) — Strukturbericht/word 'D024' in the TDB name
Stability: stable in 1 of 1 calculated diagram(s): 300–2523 K, x(Zr) 0.20598–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-zr:hcp-d024
tdb: tdb:PtZr-10Gao.tdb:D024_HCP

TDB models of D024_HCP (1): PHASE and CONSTITUENT statements as written

PtZr-10Gao.tdb: D024_HCP, type code %AZ, sha256 3acdf8b6d62c6648…

59: PHASE D024_HCP %AZ 3 0.75 0.25 0.5 !
60: CONST D024_HCP : PT% ZR : PT ZR% : VA : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110351 Y. Gao, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 819-26(2010).
assessment that models this phase

LIQUID (Pt–Zr)

Id: phase:pt-zr:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1458.12–4000 K, x(Zr) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-zr:liquid
tdb: tdb:PtZr-10Gao.tdb:LIQUID

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

PtZr-10Gao.tdb: LIQUID, type code %, sha256 3acdf8b6d62c6648…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : PT ZR : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110351 Y. Gao, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 819-26(2010).
assessment that models this phase

PT10ZR7 (Pt–Zr)

Id: phase:pt-zr:pt10zr7; status assigned
Structure: Ni10Zr7 · oC68 · Cmce (64); type st:ni10zr7-oc68; 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: Pt 0.5882, Zr 0.4118
Stability: stable in 1 of 1 calculated diagram(s): 300–2010 K, x(Zr) 0.41176–0.41176
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-zr:pt10zr7
tdb: tdb:PtZr-10Gao.tdb:PT10ZR7

TDB models of PT10ZR7 (1): PHASE and CONSTITUENT statements as written

PtZr-10Gao.tdb: PT10ZR7, type code %, sha256 3acdf8b6d62c6648…

69: PHASE PT10ZR7 % 2 10 7 !
70: CONST PT10ZR7 : PT : ZR : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110351 Y. Gao, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 819-26(2010).
assessment that models this phase

PT3ZR5_D88 (Pt–Zr)

Id: phase:pt-zr:pt3zr5-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: partitioned order/disorder model in PtZr-10Gao.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–1902.65 K, x(Zr) 0.625–0.63599
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-zr:pt3zr5-d88
tdb: tdb:PtZr-10Gao.tdb:PT3ZR5_D88

TDB models of PT3ZR5_D88 (1): PHASE and CONSTITUENT statements as written

PtZr-10Gao.tdb: PT3ZR5_D88, type code %, sha256 3acdf8b6d62c6648…

84: PHASE PT3ZR5_D88 % 2 3 5 !
85: CONST PT3ZR5_D88 : PT% ZR : PT ZR% : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110351 Y. Gao, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 819-26(2010).
assessment that models this phase

PT4ZR (Pt–Zr)

Id: phase:pt-zr:pt4zr; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model; sgte_mmc2_row_incomplete
Candidate (sgte_mmc2): (Pt4Zr) — Hallstedt 2025 mmc2 row for PT4ZR: Pt4Zr
Stability: stable in 1 of 1 calculated diagram(s): 300–2152.97 K, x(Zr) 0.19471–0.2
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-zr:pt4zr
tdb: tdb:PtZr-10Gao.tdb:PT4ZR

TDB models of PT4ZR (1): PHASE and CONSTITUENT statements as written

PtZr-10Gao.tdb: PT4ZR, type code %, sha256 3acdf8b6d62c6648…

64: PHASE PT4ZR % 2 4 1 !
65: CONST PT4ZR : PT% ZR : PT ZR% : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110351 Y. Gao, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 819-26(2010).
assessment that models this phase

PT4ZR3 (Pt–Zr)

Id: phase:pt-zr:pt4zr3; status assigned
Structure: Pd4Pu3 · hR14 · R-3 (148); type st:pd4pu3-hr14; 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_structure_token, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: stable in 1 of 1 calculated diagram(s): 300–2193.2 K, x(Zr) 0.42857–0.45549
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-zr:pt4zr3
tdb: tdb:PtZr-10Gao.tdb:PT4ZR3

TDB models of PT4ZR3 (1): PHASE and CONSTITUENT statements as written

PtZr-10Gao.tdb: PT4ZR3, type code %, sha256 3acdf8b6d62c6648…

74: PHASE PT4ZR3 % 2 4 3 !
75: CONST PT4ZR3 : PT% ZR : PT ZR% : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110351 Y. Gao, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 819-26(2010).
assessment that models this phase

PTZR_B33 (Pt–Zr)

Id: phase:pt-zr:ptzr-b33; status assigned
Structure: CrB · B33 · oC8 · Cmcm (63); type st:b33-crb-oc8; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in PtZr-10Gao.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–1862.98 K, x(Zr) 0.5–0.53571
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:pt-zr:ptzr-b33
tdb: tdb:PtZr-10Gao.tdb:PTZR_B33

TDB models of PTZR_B33 (1): PHASE and CONSTITUENT statements as written

PtZr-10Gao.tdb: PTZR_B33, type code %, sha256 3acdf8b6d62c6648…

79: PHASE PTZR_B33 % 2 1 1 !
80: CONST PTZR_B33 : PT% ZR : PT ZR% : !

Example references (1 of 1; assessments first):

doi:10.3139/146.110351 Y. Gao, C. Guo, C. Li, Z. Du, Int. J. Mater. Res., 101, 819-26(2010).
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}
}