Nb–Re phases

6 phases (tier A 5, liquid 1); 5 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 · Nb–Re system page · Markdown · field reference

Phases of the Nb–Re system (6)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
CHI_A12 phase:nb-re:a12-chi	alpha-Mn · A12 · cI58 · I-43m (217)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–3018.52 K, x(Re) 0.60144–0.90044	24	2
BCC_A2 phase:nb-re:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–2779.46 K, x(Re) 0–0.46955	10	2
SIGMA_D8B phase:nb-re:d8b-sigma	sigma-CrFe · D8_b · tP30 · P4_2/mnm (136)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 2435.76–2831.78 K, x(Re) 0.52522–0.59992	21	2
FCC_A1 phase:nb-re:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 2 calculated diagram(s)	0	2
HCP_A3 phase:nb-re:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–3999.23 K, x(Re) 0.97513–1	5	2
LIQUID phase:nb-re:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 2703.45–4000 K, x(Re) 0–1	15	2

CHI_A12 (Nb–Re)

Id: phase:nb-re:a12-chi; status assigned
Structure: alpha-Mn · A12 · cI58 · I-43m (217); type st:a12-alpha-mn-ci58; tier A: standard phase name; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 300–3018.52 K, x(Re) 0.60144–0.90044
Literature: 24 values (24 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:nb-re:a12-chi, corpus:phase:nb-re:chi-a12
paper: paper:10.1016/j.calphad.2013.02.006:(χ), paper:10.1016/j.calphad.2013.02.006:χ, paper:10.1016/j.calphad.2020.101797:χ
tdb: tdb:NbRe-13Liu.tdb:CHI_A12, tdb:NbRe-20Yen.tdb:CHI_A12

TDB models of CHI_A12 (2): PHASE and CONSTITUENT statements as written

NbRe-13Liu.tdb: CHI_A12, type code %, sha256 9127581a18abfbf7…

40: PHASE CHI_A12 % 3 24 10 24 !
41: CONST CHI_A12 : RE : NB RE : NB RE : !

NbRe-20Yen.tdb: CHI_A12, type code %, sha256 a3f16c73704aef3b…

40: PHASE CHI_A12 % 3 24 10 24 !
41: CONST CHI_A12 : RE : NB RE : NB RE : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2013.02.006 Xuan L. Liu, Chelsey Z. Hargather, Zi-Kui Liu, First-principles aided thermodynamic modeling of the Nb–Re system, Calphad 41, 119-127 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2020.101797 Shao-yu Yen, Shu-chang Wu, M. Anshar Makhraja, Kai-chi Lo, An-chou Yeh, Kyosuke Yoshimi et al., Phase equilibria and thermodynamic assessment of the Mo–Nb-Re ternary system, Calphad 70, 101797 (2020).
assessment that models this phase; reports values for this phase

BCC_A2 (Nb–Re)

Id: phase:nb-re: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): 300–2779.46 K, x(Re) 0–0.46955
Literature: 10 values (10 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:nb-re:bcc-a2
paper: paper:10.1016/j.calphad.2013.02.006:bcc, paper:10.1016/j.calphad.2020.101797:bcc
tdb: tdb:NbRe-13Liu.tdb:BCC_A2, tdb:NbRe-20Yen.tdb:BCC_A2

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

NbRe-13Liu.tdb: BCC_A2, type code %B, sha256 9127581a18abfbf7…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : NB% RE : VA : !

NbRe-20Yen.tdb: BCC_A2, type code %B, sha256 a3f16c73704aef3b…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : NB% RE : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2020.101797 Shao-yu Yen, Shu-chang Wu, M. Anshar Makhraja, Kai-chi Lo, An-chou Yeh, Kyosuke Yoshimi et al., Phase equilibria and thermodynamic assessment of the Mo–Nb-Re ternary system, Calphad 70, 101797 (2020).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2013.02.006 Xuan L. Liu, Chelsey Z. Hargather, Zi-Kui Liu, First-principles aided thermodynamic modeling of the Nb–Re system, Calphad 41, 119-127 (2013).
assessment that models this phase; reports values for this phase

SIGMA_D8B (Nb–Re)

Id: phase:nb-re:d8b-sigma; status assigned
Structure: sigma-CrFe · D8_b · tP30 · P4_2/mnm (136); type st:d8-b-sigma-crfe-tp30; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in NbRe-20Yen.tdb also describes the disordered state
Stability: stable in 2 of 2 calculated diagram(s): 2435.76–2831.78 K, x(Re) 0.52522–0.59992
Literature: 21 values (21 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:nb-re:d8b-sigma, corpus:phase:nb-re:sigma-d8b
paper: paper:10.1016/j.calphad.2013.02.006:(σ), paper:10.1016/j.calphad.2013.02.006:σ, paper:10.1016/j.calphad.2020.101797:σ
tdb: tdb:NbRe-13Liu.tdb:SIGMA_D8B, tdb:NbRe-20Yen.tdb:SIGMA_D8B

TDB models of SIGMA_D8B (2): PHASE and CONSTITUENT statements as written

NbRe-13Liu.tdb: SIGMA_D8B, type code %, sha256 9127581a18abfbf7…

45: PHASE SIGMA_D8B % 3 10 4 16 !
46: CONST SIGMA_D8B : RE : NB : NB RE : !

NbRe-20Yen.tdb: SIGMA_D8B, type code %, sha256 a3f16c73704aef3b…

45: PHASE SIGMA_D8B % 3 10 4 16 !
46: CONST SIGMA_D8B : RE : NB RE : NB RE : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2013.02.006 Xuan L. Liu, Chelsey Z. Hargather, Zi-Kui Liu, First-principles aided thermodynamic modeling of the Nb–Re system, Calphad 41, 119-127 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2020.101797 Shao-yu Yen, Shu-chang Wu, M. Anshar Makhraja, Kai-chi Lo, An-chou Yeh, Kyosuke Yoshimi et al., Phase equilibria and thermodynamic assessment of the Mo–Nb-Re ternary system, Calphad 70, 101797 (2020).
assessment that models this phase; reports values for this phase

FCC_A1 (Nb–Re)

Id: phase:nb-re:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
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:nb-re:fcc-a1
tdb: tdb:NbRe-13Liu.tdb:FCC_A1, tdb:NbRe-20Yen.tdb:FCC_A1

TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written

NbRe-13Liu.tdb: FCC_A1, type code %A, sha256 9127581a18abfbf7…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : NB RE : VA : !

NbRe-20Yen.tdb: FCC_A1, type code %A, sha256 a3f16c73704aef3b…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : NB RE : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2013.02.006 Xuan L. Liu, Chelsey Z. Hargather, Zi-Kui Liu, First-principles aided thermodynamic modeling of the Nb–Re system, Calphad 41, 119-127 (2013).
assessment that models this phase
doi:10.1016/j.calphad.2020.101797 Shao-yu Yen, Shu-chang Wu, M. Anshar Makhraja, Kai-chi Lo, An-chou Yeh, Kyosuke Yoshimi et al., Phase equilibria and thermodynamic assessment of the Mo–Nb-Re ternary system, Calphad 70, 101797 (2020).
assessment that models this phase

HCP_A3 (Nb–Re)

Id: phase:nb-re: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): 300–3999.23 K, x(Re) 0.97513–1
Literature: 5 values (5 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:nb-re:hcp-a3
paper: paper:10.1016/j.calphad.2013.02.006:hcp, paper:10.1016/j.calphad.2020.101797:hcp
tdb: tdb:NbRe-13Liu.tdb:HCP_A3, tdb:NbRe-20Yen.tdb:HCP_A3

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

NbRe-13Liu.tdb: HCP_A3, type code %A, sha256 9127581a18abfbf7…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : NB RE% : VA : !

NbRe-20Yen.tdb: HCP_A3, type code %A, sha256 a3f16c73704aef3b…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : NB RE% : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2020.101797 Shao-yu Yen, Shu-chang Wu, M. Anshar Makhraja, Kai-chi Lo, An-chou Yeh, Kyosuke Yoshimi et al., Phase equilibria and thermodynamic assessment of the Mo–Nb-Re ternary system, Calphad 70, 101797 (2020).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2013.02.006 Xuan L. Liu, Chelsey Z. Hargather, Zi-Kui Liu, First-principles aided thermodynamic modeling of the Nb–Re system, Calphad 41, 119-127 (2013).
assessment that models this phase; reports values for this phase

LIQUID (Nb–Re)

Id: phase:nb-re:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 2703.45–4000 K, x(Re) 0–1
Literature: 15 values (15 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:nb-re:liquid
paper: paper:10.1016/j.calphad.2013.02.006:L, paper:10.1016/j.calphad.2020.101797:L
tdb: tdb:NbRe-13Liu.tdb:LIQUID, tdb:NbRe-20Yen.tdb:LIQUID

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

NbRe-13Liu.tdb: LIQUID, type code %, sha256 9127581a18abfbf7…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : NB RE : !

NbRe-20Yen.tdb: LIQUID, type code %, sha256 a3f16c73704aef3b…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : NB RE : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2020.101797 Shao-yu Yen, Shu-chang Wu, M. Anshar Makhraja, Kai-chi Lo, An-chou Yeh, Kyosuke Yoshimi et al., Phase equilibria and thermodynamic assessment of the Mo–Nb-Re ternary system, Calphad 70, 101797 (2020).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2013.02.006 Xuan L. Liu, Chelsey Z. Hargather, Zi-Kui Liu, First-principles aided thermodynamic modeling of the Nb–Re system, Calphad 41, 119-127 (2013).
assessment that models this phase; reports 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). 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}
}