C–Dy phases

9 phases (tier A 7, tier C 1, liquid 1); 7 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 · Markdown · field reference

Phases of the C–Dy system (9)
Phase	Structure	Basis	Stability (calculated)	TDB models
DIAMOND_A4 phase:c-dy:a4-diamond	C (diamond) · A4 · cF8 · Fd-3m (227)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
BCC_A2 phase:c-dy:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1654.13–3999.13 K, x(C) 0–0	1
DY2C3_D5C phase:c-dy:dy2c3-d5c	Pu2C3 · D5_c · cI40 · I-43d (220)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1895.03 K, x(C) 0.6–0.6	1
DYC2_C1 phase:c-dy:dyc2-c1	CaF2 · C1 · cF12 · Fm-3m (225)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 1568.63–2564.18 K, x(C) 0.66667–0.66667	1
DYC2_C11A phase:c-dy:dyc2-c11a	CaC2 · C11_a · tI6 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1568.63 K, x(C) 0.66667–0.66667	1
FCC_A1 phase:c-dy:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
GRAPHITE phase:c-dy:graphite	C (graphite) · A9 · hP4 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–4000 K, x(C) 1–1	1
HCP_A3 phase:c-dy:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1669.13 K, x(C) 0–0	1
LIQUID phase:c-dy:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1212.54–4000 K, x(C) 0–0.84943	1

DIAMOND_A4 (C–Dy)

Id: phase:c-dy:a4-diamond; status assigned
Structure: C (diamond) · A4 · cF8 · Fd-3m (227); type st:a4-c-diamond-cf8; tier A: standard phase name; confidence high
Stoichiometry: C 1.0000
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:c-dy:a4-diamond
tdb: tdb:DyC-20Xu.tdb:DIAMOND_A4

TDB models of DIAMOND_A4 (1): PHASE and CONSTITUENT statements as written

DyC-20Xu.tdb: DIAMOND_A4, type code %, sha256 773f0d8f1049a3a6…

46: PHASE DIAMOND_A4 % 1 1 !
47: CONST DIAMOND_A4 : C : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2020.101738 K. Xu, L. Chen, K. Chang, P. Wan, M. Li, Z. Deng, F. Huang, Q. Huang, Calphad, 68, 101738(2020).
assessment that models this phase

BCC_A2 (C–Dy)

Id: phase:c-dy: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): 1654.13–3999.13 K, x(C) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-dy:bcc-a2
tdb: tdb:DyC-20Xu.tdb:BCC_A2

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

DyC-20Xu.tdb: BCC_A2, type code %B, sha256 773f0d8f1049a3a6…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : DY : C VA% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2020.101738 K. Xu, L. Chen, K. Chang, P. Wan, M. Li, Z. Deng, F. Huang, Q. Huang, Calphad, 68, 101738(2020).
assessment that models this phase

DY2C3_D5C (C–Dy)

Id: phase:c-dy:dy2c3-d5c; status assigned
Structure: Pu2C3 · D5_c · cI40 · I-43d (220); type st:d5-c-pu2c3-ci40; tier A: standard phase name; confidence high
Stoichiometry: C 0.6000, Dy 0.4000
Stability: stable in 1 of 1 calculated diagram(s): 300–1895.03 K, x(C) 0.6–0.6
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-dy:dy2c3-d5c
tdb: tdb:DyC-20Xu.tdb:DY2C3_D5C

TDB models of DY2C3_D5C (1): PHASE and CONSTITUENT statements as written

DyC-20Xu.tdb: DY2C3_D5C, type code %, sha256 773f0d8f1049a3a6…

56: PHASE DY2C3_D5C % 2 2 3 !
57: CONST DY2C3_D5C : DY : C : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2020.101738 K. Xu, L. Chen, K. Chang, P. Wan, M. Li, Z. Deng, F. Huang, Q. Huang, Calphad, 68, 101738(2020).
assessment that models this phase

DYC2_C1 (C–Dy)

Id: phase:c-dy:dyc2-c1; status assigned
Structure: CaF2 · C1 · cF12 · Fm-3m (225); type st:c1-caf2-cf12; 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, polymorph_family:other phases of this system have the same composition, structure_token_is_also_a_formula); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: C 0.6667, Dy 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 1568.63–2564.18 K, x(C) 0.66667–0.66667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-dy:dyc2-c1
tdb: tdb:DyC-20Xu.tdb:DYC2_C1

TDB models of DYC2_C1 (1): PHASE and CONSTITUENT statements as written

DyC-20Xu.tdb: DYC2_C1, type code %, sha256 773f0d8f1049a3a6…

66: PHASE DYC2_C1 % 2 1 2 !
67: CONST DYC2_C1 : DY : C : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2020.101738 K. Xu, L. Chen, K. Chang, P. Wan, M. Li, Z. Deng, F. Huang, Q. Huang, Calphad, 68, 101738(2020).
assessment that models this phase

DYC2_C11A (C–Dy)

Id: phase:c-dy:dyc2-c11a; status assigned
Structure: CaC2 · C11_a · tI6 · I4/mmm (139); type st:c11-a-cac2-ti6; tier A: standard phase name; confidence high
Stoichiometry: C 0.6667, Dy 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1568.63 K, x(C) 0.66667–0.66667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-dy:dyc2-c11a
tdb: tdb:DyC-20Xu.tdb:DYC2_C11A

TDB models of DYC2_C11A (1): PHASE and CONSTITUENT statements as written

DyC-20Xu.tdb: DYC2_C11A, type code %, sha256 773f0d8f1049a3a6…

61: PHASE DYC2_C11A % 2 1 2 !
62: CONST DYC2_C11A : DY : C : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2020.101738 K. Xu, L. Chen, K. Chang, P. Wan, M. Li, Z. Deng, F. Huang, Q. Huang, Calphad, 68, 101738(2020).
assessment that models this phase

FCC_A1 (C–Dy)

Id: phase:c-dy: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 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-dy:fcc-a1
tdb: tdb:DyC-20Xu.tdb:FCC_A1

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

DyC-20Xu.tdb: FCC_A1, type code %A, sha256 773f0d8f1049a3a6…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : DY : C VA% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2020.101738 K. Xu, L. Chen, K. Chang, P. Wan, M. Li, Z. Deng, F. Huang, Q. Huang, Calphad, 68, 101738(2020).
assessment that models this phase

GRAPHITE (C–Dy)

Id: phase:c-dy:graphite; status assigned
Structure: C (graphite) · A9 · hP4 · P6_3/mmc (194); type st:a9-c-graphite-hp4; tier A: standard phase name; confidence high
Stoichiometry: C 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–4000 K, x(C) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-dy:graphite
tdb: tdb:DyC-20Xu.tdb:GRAPHITE

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

DyC-20Xu.tdb: GRAPHITE, type code %, sha256 773f0d8f1049a3a6…

51: PHASE GRAPHITE % 1 1 !
52: CONST GRAPHITE : C : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2020.101738 K. Xu, L. Chen, K. Chang, P. Wan, M. Li, Z. Deng, F. Huang, Q. Huang, Calphad, 68, 101738(2020).
assessment that models this phase

HCP_A3 (C–Dy)

Id: phase:c-dy: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): 300–1669.13 K, x(C) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-dy:hcp-a3
tdb: tdb:DyC-20Xu.tdb:HCP_A3

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

DyC-20Xu.tdb: HCP_A3, type code %A, sha256 773f0d8f1049a3a6…

41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : DY : C VA% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2020.101738 K. Xu, L. Chen, K. Chang, P. Wan, M. Li, Z. Deng, F. Huang, Q. Huang, Calphad, 68, 101738(2020).
assessment that models this phase

LIQUID (C–Dy)

Id: phase:c-dy:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1212.54–4000 K, x(C) 0–0.84943
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:c-dy:liquid
tdb: tdb:DyC-20Xu.tdb:LIQUID

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

DyC-20Xu.tdb: LIQUID, type code %, sha256 773f0d8f1049a3a6…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : C DY : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2020.101738 K. Xu, L. Chen, K. Chang, P. Wan, M. Li, Z. Deng, F. Huang, Q. Huang, Calphad, 68, 101738(2020).
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}
}