Cr–La phases

5 phases (tier A 4, liquid 1); 4 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 · Cr–La system page · Markdown · field reference

Phases of the Cr–La system (5)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:cr-la:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–3999.16 K, x(La) 0–1	11	2
DHCP phase:cr-la:dhcp-a3	alpha-La · A3' · hP4 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1125 K, x(La) 1–1	1	2
FCC_A1 phase:cr-la:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 549.93–1189 K, x(La) 0.99553–1	4	2
HCP_A3 phase:cr-la:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 2 calculated diagram(s)	0	2
LIQUID phase:cr-la:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 1126.03–4000 K, x(La) 0–1	12	2

BCC_A2 (Cr–La)

Id: phase:cr-la: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): 300–3999.16 K, x(La) 0–1
Literature: 11 values (11 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:cr-la:bcc-a2
paper: paper:10.1007/s11669-009-9581-3:Cr, paper:10.1007/s11669-009-9581-3:γLa
tdb: tdb:CrLa-09Cha.tdb:BCC_A2, tdb:CrLa-09Pov.tdb:BCC_A2

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

CrLa-09Cha.tdb: BCC_A2, type code %B, sha256 7eae47ddc2ae31ca…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : CR LA : VA : !

CrLa-09Pov.tdb: BCC_A2, type code %B, sha256 af1685101b0145ad…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : CR LA : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-009-9581-3 Wren Chan, Michael C. Gao, Ömer N. Doğan, Paul King, Anthony D. Rollett, Thermodynamic Assessment of Cr-Rare Earth Systems, J. Phase Equilib. Diffus. 30, 578-586 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-008-9463-0 E. Povoden, M. Chen, A.N. Grundy, T. Ivas, L.J. Gauckler, Thermodynamic Assessment of the La-Cr-O System, J. Phase Equilib. Diffus. 30, 12-27 (2009).
assessment that models this phase

DHCP (Cr–La)

Id: phase:cr-la:dhcp-a3; status assigned
Structure: alpha-La · A3' · hP4 · P6_3/mmc (194); type st:a3-alpha-la-hp4; tier A: standard phase name; confidence high
Stoichiometry: La 1.0000
Stability: stable in 2 of 2 calculated diagram(s): 300–1125 K, x(La) 1–1
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:cr-la:dhcp-a3, corpus:phase:cr-la:dhcp
paper: paper:10.1007/s11669-009-9581-3:αLa
tdb: tdb:CrLa-09Cha.tdb:DHCP, tdb:CrLa-09Pov.tdb:DHCP

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

CrLa-09Cha.tdb: DHCP, type code %, sha256 7eae47ddc2ae31ca…

41: PHASE DHCP % 2 1 0.5 !
42: CONST DHCP : LA : VA : !

CrLa-09Pov.tdb: DHCP, type code %, sha256 af1685101b0145ad…

43: PHASE DHCP % 2 1 0.5 !
44: CONST DHCP : LA : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-009-9581-3 Wren Chan, Michael C. Gao, Ömer N. Doğan, Paul King, Anthony D. Rollett, Thermodynamic Assessment of Cr-Rare Earth Systems, J. Phase Equilib. Diffus. 30, 578-586 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-008-9463-0 E. Povoden, M. Chen, A.N. Grundy, T. Ivas, L.J. Gauckler, Thermodynamic Assessment of the La-Cr-O System, J. Phase Equilib. Diffus. 30, 12-27 (2009).
assessment that models this phase

FCC_A1 (Cr–La)

Id: phase:cr-la: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): 549.93–1189 K, x(La) 0.99553–1
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:cr-la:fcc-a1
paper: paper:10.1007/s11669-009-9581-3:βLa
tdb: tdb:CrLa-09Cha.tdb:FCC_A1, tdb:CrLa-09Pov.tdb:FCC_A1

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

CrLa-09Cha.tdb: FCC_A1, type code %A, sha256 7eae47ddc2ae31ca…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : CR LA : VA : !

CrLa-09Pov.tdb: FCC_A1, type code %A, sha256 af1685101b0145ad…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : CR LA : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-009-9581-3 Wren Chan, Michael C. Gao, Ömer N. Doğan, Paul King, Anthony D. Rollett, Thermodynamic Assessment of Cr-Rare Earth Systems, J. Phase Equilib. Diffus. 30, 578-586 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-008-9463-0 E. Povoden, M. Chen, A.N. Grundy, T. Ivas, L.J. Gauckler, Thermodynamic Assessment of the La-Cr-O System, J. Phase Equilib. Diffus. 30, 12-27 (2009).
assessment that models this phase

HCP_A3 (Cr–La)

Id: phase:cr-la:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stoichiometry: Cr 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:cr-la:hcp-a3
tdb: tdb:CrLa-09Cha.tdb:HCP_A3, tdb:CrLa-09Pov.tdb:HCP_A3

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

CrLa-09Cha.tdb: HCP_A3, type code %A, sha256 7eae47ddc2ae31ca…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : CR : VA : !

CrLa-09Pov.tdb: HCP_A3, type code %A, sha256 af1685101b0145ad…

38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : CR : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-008-9463-0 E. Povoden, M. Chen, A.N. Grundy, T. Ivas, L.J. Gauckler, Thermodynamic Assessment of the La-Cr-O System, J. Phase Equilib. Diffus. 30, 12-27 (2009).
assessment that models this phase
doi:10.1007/s11669-009-9581-3 Wren Chan, Michael C. Gao, Ömer N. Doğan, Paul King, Anthony D. Rollett, Thermodynamic Assessment of Cr-Rare Earth Systems, J. Phase Equilib. Diffus. 30, 578-586 (2009).
assessment that models this phase

LIQUID (Cr–La)

Id: phase:cr-la:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 1126.03–4000 K, x(La) 0–1
Literature: 12 values (12 accepted) from 2 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:cr-la:liquid
paper: paper:10.1007/s11669-008-9463-0:liquid, paper:10.1007/s11669-009-9581-3:L1, paper:10.1007/s11669-009-9581-3:L2
tdb: tdb:CrLa-09Cha.tdb:LIQUID, tdb:CrLa-09Pov.tdb:LIQUID

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

CrLa-09Cha.tdb: LIQUID, type code %, sha256 7eae47ddc2ae31ca…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : CR LA : !

CrLa-09Pov.tdb: LIQUID, type code %, sha256 af1685101b0145ad…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : CR LA : !

Example references (3 of 3; assessments first):

doi:10.1007/s11669-009-9581-3 Wren Chan, Michael C. Gao, Ömer N. Doğan, Paul King, Anthony D. Rollett, Thermodynamic Assessment of Cr-Rare Earth Systems, J. Phase Equilib. Diffus. 30, 578-586 (2009).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-008-9463-0 E. Povoden, M. Chen, A.N. Grundy, T. Ivas, L.J. Gauckler, Thermodynamic Assessment of the La-Cr-O System, J. Phase Equilib. Diffus. 30, 12-27 (2009).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(91)90030-n A.T. Dinsdale, SGTE data for pure elements, Calphad 15, 317-425 (1991).
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). 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}
}