C–Pd phases

6 phases (tier A 5, liquid 1); 3 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 · C–Pd system page · Markdown · field reference

Phases of the C–Pd system (6)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
DIAMOND_A4 phase:c-pd:a4-diamond	C (diamond) · A4 · cF8 · Fd-3m (227)	tier A: standard phase name	not stable in 3 calculated diagram(s)	0	3
GRAPHITE_A9 phase:c-pd:a9-graphite	C (graphite) · A9 · hP4 · P6_3/mmc (194)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–4000 K, x(C) 0.99961–1	2	3
BCC_A2 phase:c-pd:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 3 calculated diagram(s)	0	3
FCC_A1 phase:c-pd:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1828.77 K, x(C) 0–0.08565	2	3
HCP_A3 phase:c-pd:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 3 calculated diagram(s)	0	3
LIQUID phase:c-pd:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 1765.16–4000 K, x(C) 0–0.62447	2	3

DIAMOND_A4 (C–Pd)

Id: phase:c-pd: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
Stability: not stable in 3 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:c-pd:a4-diamond
tdb: tdb:PdC-04Kor-LB.tdb:DIAMOND_A4, tdb:PdC-06Du.tdb:DIAMOND_A4, tdb:PdC-20Jia.tdb:DIAMOND_A4

TDB models of DIAMOND_A4 (3): PHASE and CONSTITUENT statements as written

PdC-04Kor-LB.tdb: DIAMOND_A4, type code %, sha256 f28cef69e245166a…

42: PHASE DIAMOND_A4 % 1 1 !
43: CONST DIAMOND_A4 : C : !

PdC-06Du.tdb: DIAMOND_A4, type code %, sha256 53286c4307480550…

45: PHASE DIAMOND_A4 % 1 1 !
46: CONST DIAMOND_A4 : C% PD : !

PdC-20Jia.tdb: DIAMOND_A4, type code %, sha256 321588b3daac71cd…

39: PHASE DIAMOND_A4 % 1 1 !
40: CONST DIAMOND_A4 : C : !

Example references (2 of 2; assessments first):

doi:10.1016/j.commatsci.2019.109238 Chao Jiang, Isabella J. van Rooyen, Subhashish Meher, Ab initio study and thermodynamic modeling of the Pd-Si-C system, Computational Materials Science 171, 109238 (2020).
assessment that models this phase
doi:10.1016/j.intermet.2005.09.008 Zhenmin Du, Cuiping Guo, Xiaojian Yang, Ting Liu, A thermodynamic description of the Pd–Si–C system, Intermetallics 14, 560-569 (2006).
assessment that models this phase

GRAPHITE_A9 (C–Pd)

Id: phase:c-pd:a9-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
Stability: stable in 3 of 3 calculated diagram(s): 300–4000 K, x(C) 0.99961–1
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:c-pd:a9-graphite
paper: paper:10.1016/j.intermet.2005.09.008:graphite(C)
tdb: tdb:PdC-04Kor-LB.tdb:GRAPHITE_A9, tdb:PdC-06Du.tdb:GRAPHITE_A9, tdb:PdC-20Jia.tdb:GRAPHITE_A9

TDB models of GRAPHITE_A9 (3): PHASE and CONSTITUENT statements as written

PdC-04Kor-LB.tdb: GRAPHITE_A9, type code %, sha256 f28cef69e245166a…

47: PHASE GRAPHITE_A9 % 1 1 !
48: CONST GRAPHITE_A9 : C : !

PdC-06Du.tdb: GRAPHITE_A9, type code %, sha256 53286c4307480550…

50: PHASE GRAPHITE_A9 % 1 1 !
51: CONST GRAPHITE_A9 : C% PD : !

PdC-20Jia.tdb: GRAPHITE_A9, type code %, sha256 321588b3daac71cd…

44: PHASE GRAPHITE_A9 % 1 1 !
45: CONST GRAPHITE_A9 : C : !

Example references (3 of 3; assessments first):

doi:10.1016/j.intermet.2005.09.008 Zhenmin Du, Cuiping Guo, Xiaojian Yang, Ting Liu, A thermodynamic description of the Pd–Si–C system, Intermetallics 14, 560-569 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.commatsci.2019.109238 Chao Jiang, Isabella J. van Rooyen, Subhashish Meher, Ab initio study and thermodynamic modeling of the Pd-Si-C system, Computational Materials Science 171, 109238 (2020).
assessment that models this phase
doi:10.1021/j100839a028 M. R. Nadler, Charles P. Kempter, SOME SOLIDUS TEMPERATURES IN SEVERAL METAL—CARBON SYSTEMS, J. Phys. Chem. 64, 1468-1471 (1960).
cited as the source of values for this phase

BCC_A2 (C–Pd)

Id: phase:c-pd: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 3 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:c-pd:bcc-a2
tdb: tdb:PdC-04Kor-LB.tdb:BCC_A2, tdb:PdC-06Du.tdb:BCC_A2, tdb:PdC-20Jia.tdb:BCC_A2

TDB models of BCC_A2 (3): PHASE and CONSTITUENT statements as written

PdC-04Kor-LB.tdb: BCC_A2, type code %B, sha256 f28cef69e245166a…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : PD : C VA% : !

PdC-06Du.tdb: BCC_A2, type code %B, sha256 53286c4307480550…

35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : PD : C VA% : !

PdC-20Jia.tdb: BCC_A2, type code %B, sha256 321588b3daac71cd…

29: PHASE BCC_A2 %B 2 1 3 !
30: CONST BCC_A2 : PD : C VA% : !

Example references (2 of 2; assessments first):

doi:10.1016/j.commatsci.2019.109238 Chao Jiang, Isabella J. van Rooyen, Subhashish Meher, Ab initio study and thermodynamic modeling of the Pd-Si-C system, Computational Materials Science 171, 109238 (2020).
assessment that models this phase
doi:10.1016/j.intermet.2005.09.008 Zhenmin Du, Cuiping Guo, Xiaojian Yang, Ting Liu, A thermodynamic description of the Pd–Si–C system, Intermetallics 14, 560-569 (2006).
assessment that models this phase

FCC_A1 (C–Pd)

Id: phase:c-pd: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 3 of 3 calculated diagram(s): 300–1828.77 K, x(C) 0–0.08565
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:c-pd:fcc-a1
paper: paper:10.1016/j.intermet.2005.09.008:fcc(Pd)
tdb: tdb:PdC-04Kor-LB.tdb:FCC_A1, tdb:PdC-06Du.tdb:FCC_A1, tdb:PdC-20Jia.tdb:FCC_A1

TDB models of FCC_A1 (3): PHASE and CONSTITUENT statements as written

PdC-04Kor-LB.tdb: FCC_A1, type code %A, sha256 f28cef69e245166a…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : PD : C VA% : !

PdC-06Du.tdb: FCC_A1, type code %A, sha256 53286c4307480550…

30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : C PD% : VA : !

PdC-20Jia.tdb: FCC_A1, type code %A, sha256 321588b3daac71cd…

24: PHASE FCC_A1 %A 2 1 1 !
25: CONST FCC_A1 : PD : C VA% : !

Example references (3 of 3; assessments first):

doi:10.1016/j.intermet.2005.09.008 Zhenmin Du, Cuiping Guo, Xiaojian Yang, Ting Liu, A thermodynamic description of the Pd–Si–C system, Intermetallics 14, 560-569 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.commatsci.2019.109238 Chao Jiang, Isabella J. van Rooyen, Subhashish Meher, Ab initio study and thermodynamic modeling of the Pd-Si-C system, Computational Materials Science 171, 109238 (2020).
assessment that models this phase
doi:10.1021/j100839a028 M. R. Nadler, Charles P. Kempter, SOME SOLIDUS TEMPERATURES IN SEVERAL METAL—CARBON SYSTEMS, J. Phys. Chem. 64, 1468-1471 (1960).
cited as the source of values for this phase

HCP_A3 (C–Pd)

Id: phase:c-pd: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 3 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:c-pd:hcp-a3
tdb: tdb:PdC-04Kor-LB.tdb:HCP_A3, tdb:PdC-06Du.tdb:HCP_A3, tdb:PdC-20Jia.tdb:HCP_A3

TDB models of HCP_A3 (3): PHASE and CONSTITUENT statements as written

PdC-04Kor-LB.tdb: HCP_A3, type code %A, sha256 f28cef69e245166a…

37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : PD : C VA% : !

PdC-06Du.tdb: HCP_A3, type code %A, sha256 53286c4307480550…

40: PHASE HCP_A3 %A 2 1 0.5 !
41: CONST HCP_A3 : PD : C VA% : !

PdC-20Jia.tdb: HCP_A3, type code %A, sha256 321588b3daac71cd…

34: PHASE HCP_A3 %A 2 1 0.5 !
35: CONST HCP_A3 : PD : C VA% : !

Example references (2 of 2; assessments first):

doi:10.1016/j.commatsci.2019.109238 Chao Jiang, Isabella J. van Rooyen, Subhashish Meher, Ab initio study and thermodynamic modeling of the Pd-Si-C system, Computational Materials Science 171, 109238 (2020).
assessment that models this phase
doi:10.1016/j.intermet.2005.09.008 Zhenmin Du, Cuiping Guo, Xiaojian Yang, Ting Liu, A thermodynamic description of the Pd–Si–C system, Intermetallics 14, 560-569 (2006).
assessment that models this phase

LIQUID (C–Pd)

Id: phase:c-pd:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 1765.16–4000 K, x(C) 0–0.62447
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:c-pd:liquid
paper: paper:10.1016/j.intermet.2005.09.008:L
tdb: tdb:PdC-04Kor-LB.tdb:LIQUID, tdb:PdC-06Du.tdb:LIQUID, tdb:PdC-20Jia.tdb:LIQUID

TDB models of LIQUID (3): PHASE and CONSTITUENT statements as written

PdC-04Kor-LB.tdb: LIQUID, type code %, sha256 f28cef69e245166a…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : C PD : !

PdC-06Du.tdb: LIQUID, type code %, sha256 53286c4307480550…

25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : C PD : !

PdC-20Jia.tdb: LIQUID, type code %, sha256 321588b3daac71cd…

19: PHASE LIQUID:L % 1 1 !
20: CONST LIQUID:L : C PD : !

Example references (3 of 3; assessments first):

doi:10.1016/j.intermet.2005.09.008 Zhenmin Du, Cuiping Guo, Xiaojian Yang, Ting Liu, A thermodynamic description of the Pd–Si–C system, Intermetallics 14, 560-569 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.commatsci.2019.109238 Chao Jiang, Isabella J. van Rooyen, Subhashish Meher, Ab initio study and thermodynamic modeling of the Pd-Si-C system, Computational Materials Science 171, 109238 (2020).
assessment that models this phase
doi:10.1021/j100839a028 M. R. Nadler, Charles P. Kempter, SOME SOLIDUS TEMPERATURES IN SEVERAL METAL—CARBON SYSTEMS, J. Phys. Chem. 64, 1468-1471 (1960).
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}
}