C–V phases

10 phases (tier A 4, tier C 3, liquid 1, needs_review 1, interstitial_fcc_a1_compound 1); 9 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–V system page · Markdown · field reference

Phases of the C–V system (10)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
DIAMOND_A4 phase:c-v: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-v: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) 1–1	0	3
BCC_A2 phase:c-v:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–2198 K, x(C) 0–0.0383	2	3
FCC_A1 phase:c-v:fcc-a1	NaCl · B1 · cF8 · Fm-3m (225)	assigned	stable in 3 of 3 calculated diagram(s): 300–2931.49 K, x(C) 0.37104–0.49502	19	4
HCP_A3 phase:c-v:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–2466.49 K, x(C) 0.28161–0.33333	12	3
LIQUID phase:c-v:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 1920.76–4000 K, x(C) 0–0.64671	18	3
V3C2 phase:c-v:v3c2	Sc2Te3 · hR8 · R-3m (166)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–1591.67 K, x(C) 0.4–0.4	0	2
V4C3 phase:c-v:v4c3		needs_review	stable in 1 of 1 calculated diagram(s): 1534.2–2150 K, x(C) 0.379–0.379	4	1
V6C5 phase:c-v:v6c5	V6C5 · hP33 · P3_112 (151)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–2931.49 K, x(C) 0.37104–0.47241	13	1
V8C7 phase:c-v:v8c7	V8C7 · cP60 · P4_132 (213)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 647.96–1381.99 K, x(C) 0.46667–0.46667	11	1

DIAMOND_A4 (C–V)

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

Names (4): corpus: corpus:phase:c-v:a4-diamond
tdb: tdb:VC-06Hu.tdb:DIAMOND_A4, tdb:VC-20Hua.tdb:DIAMOND_A4, tdb:VC-91Hua-LB.tdb:DIAMOND_A4

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

VC-06Hu.tdb: DIAMOND_A4, type code %, sha256 b64d86a071f73e7b…

53: PHASE DIAMOND_A4 % 1 1 !
54: CONST DIAMOND_A4 : C : !

VC-20Hua.tdb: DIAMOND_A4, type code %, sha256 b82a6e368e3b247d…

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

VC-91Hua-LB.tdb: DIAMOND_A4, type code %, sha256 7ade7709e53a562d…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2020.102199 L. Huang, Y. Pan, J. Zhang, Y. Du, F. Luo, P. Zhou, S. Zhang, Calphad, 71, 102199(2020).
assessment that models this phase
doi:10.1016/j.jallcom.2005.11.033 Jincheng Hu, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic re-assessment of the V–C system, Journal of Alloys and Compounds 421, 120-127 (2006).
assessment that models this phase
doi:10.1515/ijmr-1991-820303 W. Huang, Z. Metallkd., 82, 174-81(1991).
assessment that models this phase

GRAPHITE_A9 (C–V)

Id: phase:c-v: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
Stoichiometry: C 1.0000
Stability: stable in 3 of 3 calculated diagram(s): 300–4000 K, x(C) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:c-v:a9-graphite, corpus:phase:c-v:graphite-a9
tdb: tdb:VC-06Hu.tdb:GRAPHITE_A9, tdb:VC-20Hua.tdb:GRAPHITE_A9, tdb:VC-91Hua-LB.tdb:GRAPHITE_A9

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

VC-06Hu.tdb: GRAPHITE_A9, type code %, sha256 b64d86a071f73e7b…

58: PHASE GRAPHITE_A9 % 1 1 !
59: CONST GRAPHITE_A9 : C : !

VC-20Hua.tdb: GRAPHITE_A9, type code %, sha256 b82a6e368e3b247d…

52: PHASE GRAPHITE_A9 % 1 1 !
53: CONST GRAPHITE_A9 : C : !

VC-91Hua-LB.tdb: GRAPHITE_A9, type code %, sha256 7ade7709e53a562d…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2020.102199 L. Huang, Y. Pan, J. Zhang, Y. Du, F. Luo, P. Zhou, S. Zhang, Calphad, 71, 102199(2020).
assessment that models this phase
doi:10.1016/j.jallcom.2005.11.033 Jincheng Hu, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic re-assessment of the V–C system, Journal of Alloys and Compounds 421, 120-127 (2006).
assessment that models this phase
doi:10.1515/ijmr-1991-820303 W. Huang, Z. Metallkd., 82, 174-81(1991).
assessment that models this phase

BCC_A2 (C–V)

Id: phase:c-v: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 3 of 3 calculated diagram(s): 300–2198 K, x(C) 0–0.0383
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:c-v:bcc-a2
paper: paper:10.1016/j.jallcom.2005.11.033:bcc-(V)
tdb: tdb:VC-06Hu.tdb:BCC_A2, tdb:VC-20Hua.tdb:BCC_A2, tdb:VC-91Hua-LB.tdb:BCC_A2

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

VC-06Hu.tdb: BCC_A2, type code %B, sha256 b64d86a071f73e7b…

43: PHASE BCC_A2 %B 2 1 3 !
44: CONST BCC_A2 : V : C VA% : !

VC-20Hua.tdb: BCC_A2, type code %B, sha256 b82a6e368e3b247d…

37: PHASE BCC_A2 %B 2 1 3 !
38: CONST BCC_A2 : V : C VA% : !

VC-91Hua-LB.tdb: BCC_A2, type code %B, sha256 7ade7709e53a562d…

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

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2005.11.033 Jincheng Hu, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic re-assessment of the V–C system, Journal of Alloys and Compounds 421, 120-127 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2020.102199 L. Huang, Y. Pan, J. Zhang, Y. Du, F. Luo, P. Zhou, S. Zhang, Calphad, 71, 102199(2020).
assessment that models this phase
doi:10.1515/ijmr-1991-820303 W. Huang, Z. Metallkd., 82, 174-81(1991).
assessment that models this phase
doi:10.1021/j100814a007 E. K. Storms, R. J. McNeal, THE VANADIUM-VANADIUM CARBIDE SYSTEM1, J. Phys. Chem. 66, 1401-1408 (1962).
cited as the source of values for this phase

FCC_A1 (C–V)

Id: phase:c-v:fcc-a1; status assigned
Structure: NaCl · B1 · cF8 · Fm-3m (225); type st:b1-nacl-cf8; interstitial_fcc_a1_compound; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 300–2931.49 K, x(C) 0.37104–0.49502
Literature: 19 values (19 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:c-v:fcc-a1
paper: paper:10.1016/j.jallcom.2005.11.033:VCx
tdb: tdb:VC-06Hu.tdb:A1_FCC, tdb:VC-06Hu.tdb:FCC_A1, tdb:VC-20Hua.tdb:FCC_A1, tdb:VC-91Hua-LB.tdb:FCC_A1

TDB models of FCC_A1 (4): PHASE and CONSTITUENT statements as written

VC-06Hu.tdb: A1_FCC, type code %A, sha256 b64d86a071f73e7b…

38: PHASE A1_FCC %A 2 1 1 !
39: CONST A1_FCC : C% VA : V : !

VC-06Hu.tdb: FCC_A1, type code %A, sha256 b64d86a071f73e7b…

33: PHASE FCC_A1 %A 2 1 1 !
34: CONST FCC_A1 : V : C% VA : !

VC-20Hua.tdb: FCC_A1, type code %A, sha256 b82a6e368e3b247d…

32: PHASE FCC_A1 %A 2 1 1 !
33: CONST FCC_A1 : V : C VA% : !

VC-91Hua-LB.tdb: FCC_A1, type code %A, sha256 7ade7709e53a562d…

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

Example references (8 of 8; assessments first):

doi:10.1016/j.jallcom.2005.11.033 Jincheng Hu, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic re-assessment of the V–C system, Journal of Alloys and Compounds 421, 120-127 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2020.102199 L. Huang, Y. Pan, J. Zhang, Y. Du, F. Luo, P. Zhou, S. Zhang, Calphad, 71, 102199(2020).
assessment that models this phase
doi:10.1515/ijmr-1991-820303 W. Huang, Z. Metallkd., 82, 174-81(1991).
assessment that models this phase
doi:10.1021/j100814a007 E. K. Storms, R. J. McNeal, THE VANADIUM-VANADIUM CARBIDE SYSTEM1, J. Phys. Chem. 66, 1401-1408 (1962).
cited as the source of values for this phase
doi:10.1016/s1359-6454(97)00204-8 H Wiesenberger, W Lengauer, P Ettmayer, Reactive diffusion and phase equilibria in the V–C, Nb–C, Ta–C and Ta–N systems, Acta Materialia 46, 651-666 (1998).
cited as the source of values for this phase
doi:10.1007/bf00547575 George H. Emmons, Wendell S. Williams, Thermodynamics of order-disorder transformations in vanadium carbide, J Mater Sci 18, 2589-2602 (1983).
cited as the source of values for this phase
doi:10.1088/0953-8984/11/1/014 V N Lipatnikov, A I Gusev, P Ettmayer, W Lengauer, Phase transformations in non-stoichiometric vanadium carbide, J. Phys.: Condens. Matter 11, 163-184 (1999).
cited as the source of values for this phase
doi:10.1103/physrevb.7.5041 L. W. Shacklette, Wendell S. Williams, Influence of Order-Disorder Transformations on the Electrical Resistivity of Vanadium Carbide, Phys. Rev. B 7, 5041-5053 (1973).
cited as the source of values for this phase

HCP_A3 (C–V)

Id: phase:c-v: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 3 of 3 calculated diagram(s): 300–2466.49 K, x(C) 0.28161–0.33333
Literature: 12 values (12 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:c-v:hcp-a3
paper: paper:10.1016/j.jallcom.2005.11.033:V2C
tdb: tdb:VC-06Hu.tdb:HCP_A3, tdb:VC-20Hua.tdb:HCP_A3, tdb:VC-91Hua-LB.tdb:HCP_A3

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

VC-06Hu.tdb: HCP_A3, type code %A, sha256 b64d86a071f73e7b…

48: PHASE HCP_A3 %A 2 1 0.5 !
49: CONST HCP_A3 : V : C% VA : !

VC-20Hua.tdb: HCP_A3, type code %A, sha256 b82a6e368e3b247d…

42: PHASE HCP_A3 %A 2 1 0.5 !
43: CONST HCP_A3 : V : C VA% : !

VC-91Hua-LB.tdb: HCP_A3, type code %A, sha256 7ade7709e53a562d…

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

Example references (5 of 5; assessments first):

doi:10.1016/j.jallcom.2005.11.033 Jincheng Hu, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic re-assessment of the V–C system, Journal of Alloys and Compounds 421, 120-127 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2020.102199 L. Huang, Y. Pan, J. Zhang, Y. Du, F. Luo, P. Zhou, S. Zhang, Calphad, 71, 102199(2020).
assessment that models this phase
doi:10.1515/ijmr-1991-820303 W. Huang, Z. Metallkd., 82, 174-81(1991).
assessment that models this phase
doi:10.1016/s1359-6454(97)00204-8 H Wiesenberger, W Lengauer, P Ettmayer, Reactive diffusion and phase equilibria in the V–C, Nb–C, Ta–C and Ta–N systems, Acta Materialia 46, 651-666 (1998).
cited as the source of values for this phase
doi:10.1021/j100814a007 E. K. Storms, R. J. McNeal, THE VANADIUM-VANADIUM CARBIDE SYSTEM1, J. Phys. Chem. 66, 1401-1408 (1962).
cited as the source of values for this phase

LIQUID (C–V)

Id: phase:c-v:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 1920.76–4000 K, x(C) 0–0.64671
Literature: 18 values (18 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:c-v:liquid
paper: paper:10.1016/j.jallcom.2005.11.033:Liquid, paper:10.1016/j.jallcom.2005.11.033:liquid
tdb: tdb:VC-06Hu.tdb:LIQUID, tdb:VC-20Hua.tdb:LIQUID, tdb:VC-91Hua-LB.tdb:LIQUID

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

VC-06Hu.tdb: LIQUID, type code %, sha256 b64d86a071f73e7b…

28: PHASE LIQUID:L % 1 1 !
29: CONST LIQUID:L : C V : !

VC-20Hua.tdb: LIQUID, type code %, sha256 b82a6e368e3b247d…

27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : C V : !

VC-91Hua-LB.tdb: LIQUID, type code %, sha256 7ade7709e53a562d…

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

Example references (7 of 7; assessments first):

doi:10.1016/j.jallcom.2005.11.033 Jincheng Hu, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic re-assessment of the V–C system, Journal of Alloys and Compounds 421, 120-127 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2020.102199 L. Huang, Y. Pan, J. Zhang, Y. Du, F. Luo, P. Zhou, S. Zhang, Calphad, 71, 102199(2020).
assessment that models this phase
doi:10.1515/ijmr-1991-820303 W. Huang, Z. Metallkd., 82, 174-81(1991).
assessment that models this phase
doi:10.1021/j100814a007 E. K. Storms, R. J. McNeal, THE VANADIUM-VANADIUM CARBIDE SYSTEM1, J. Phys. Chem. 66, 1401-1408 (1962).
cited as the source of values for this phase
doi:10.1007/bf00547575 George H. Emmons, Wendell S. Williams, Thermodynamics of order-disorder transformations in vanadium carbide, J Mater Sci 18, 2589-2602 (1983).
cited as the source of values for this phase
doi:10.1088/0953-8984/11/1/014 V N Lipatnikov, A I Gusev, P Ettmayer, W Lengauer, Phase transformations in non-stoichiometric vanadium carbide, J. Phys.: Condens. Matter 11, 163-184 (1999).
cited as the source of values for this phase
doi:10.1103/physrevb.7.5041 L. W. Shacklette, Wendell S. Williams, Influence of Order-Disorder Transformations on the Electrical Resistivity of Vanadium Carbide, Phys. Rev. B 7, 5041-5053 (1973).
cited as the source of values for this phase

V3C2 (C–V)

Id: phase:c-v:v3c2; status assigned
Structure: Sc2Te3 · hR8 · R-3m (166); type st:sc2te3-hr8; 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_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: C 0.4000, V 0.6000
Stability: stable in 2 of 2 calculated diagram(s): 300–1591.67 K, x(C) 0.4–0.4
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:c-v:v3c2
tdb: tdb:VC-20Hua.tdb:V3C2, tdb:VC-91Hua-LB.tdb:V3C2

TDB models of V3C2 (2): PHASE and CONSTITUENT statements as written

VC-20Hua.tdb: V3C2, type code %, sha256 b82a6e368e3b247d…

58: PHASE V3C2 % 2 3 2 !
59: CONST V3C2 : V : C : !

VC-91Hua-LB.tdb: V3C2, type code %, sha256 7ade7709e53a562d…

56: PHASE V3C2 % 2 3 2 !
57: CONST V3C2 : V : C : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2020.102199 L. Huang, Y. Pan, J. Zhang, Y. Du, F. Luo, P. Zhou, S. Zhang, Calphad, 71, 102199(2020).
assessment that models this phase
doi:10.1515/ijmr-1991-820303 W. Huang, Z. Metallkd., 82, 174-81(1991).
assessment that models this phase

V4C3 (C–V)

Id: phase:c-v:v4c3; status needs_review
No structure assigned. Why: assessment_declared_compound_differs_from_model_composition; no_on_hull_entry_in_both; no_structure_token
Candidate (literature_printed): Sc2Te3 · hR8 — printed with a label mapped to this phase
Candidate (sgte_mmc2): Sc2Te3 · hR8 · R-3m (166) — Hallstedt 2025 mmc2 row for V4C3: V3C2 (zeta-carbide)
Candidate (tdb_comment): Sc2Te3 · hR8 · R-3m — VC-06Hu.tdb: 'Prototype Sc2Te3 (hR8, R-3m), zeta-carbide'
Stoichiometry: C 0.3790, V 0.6210
Stability: stable in 1 of 1 calculated diagram(s): 1534.2–2150 K, x(C) 0.379–0.379
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:c-v:v4c3
paper: paper:10.1016/j.jallcom.2005.11.033:V4C3-x
tdb: tdb:VC-06Hu.tdb:V4C3

TDB models of V4C3 (1): PHASE and CONSTITUENT statements as written

VC-06Hu.tdb: V4C3, type code %, sha256 b64d86a071f73e7b…

64: PHASE V4C3 % 2 0.621 0.379 !
65: CONST V4C3 : V : C : !

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2005.11.033 Jincheng Hu, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic re-assessment of the V–C system, Journal of Alloys and Compounds 421, 120-127 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/s1359-6454(97)00204-8 H Wiesenberger, W Lengauer, P Ettmayer, Reactive diffusion and phase equilibria in the V–C, Nb–C, Ta–C and Ta–N systems, Acta Materialia 46, 651-666 (1998).
cited as the source of values for this phase

V6C5 (C–V)

Id: phase:c-v:v6c5; status assigned
Structure: V6C5 · hP33 · P3_112 (151); type st:v6c5-hp33; 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): 300–2931.49 K, x(C) 0.37104–0.47241
Literature: 13 values (13 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:c-v:v6c5, corpus:phase:c-v:v6c5-2
paper: paper:10.1016/j.jallcom.2005.11.033:V6C5
tdb: tdb:VC-06Hu.tdb:V6C5

TDB models of V6C5 (1): PHASE and CONSTITUENT statements as written

VC-06Hu.tdb: V6C5, type code %AY, sha256 b64d86a071f73e7b…

69: PHASE V6C5 %AY 3 0.833333 0.166667 1 !
70: CONST V6C5 : C VA : C VA : V : !

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2005.11.033 Jincheng Hu, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic re-assessment of the V–C system, Journal of Alloys and Compounds 421, 120-127 (2006).
assessment that models this phase; reports values for this phase
doi:10.1088/0953-8984/11/1/014 V N Lipatnikov, A I Gusev, P Ettmayer, W Lengauer, Phase transformations in non-stoichiometric vanadium carbide, J. Phys.: Condens. Matter 11, 163-184 (1999).
cited as the source of values for this phase
doi:10.1007/bf00547575 George H. Emmons, Wendell S. Williams, Thermodynamics of order-disorder transformations in vanadium carbide, J Mater Sci 18, 2589-2602 (1983).
cited as the source of values for this phase

V8C7 (C–V)

Id: phase:c-v:v8c7; status assigned
Structure: V8C7 · cP60 · P4_132 (213); type st:v8c7-cp60; 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_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: C 0.4667, V 0.5333
Stability: stable in 1 of 1 calculated diagram(s): 647.96–1381.99 K, x(C) 0.46667–0.46667
Literature: 11 values (11 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:c-v:v8c7
paper: paper:10.1016/j.jallcom.2005.11.033:V8C7
tdb: tdb:VC-06Hu.tdb:V8C7

TDB models of V8C7 (1): PHASE and CONSTITUENT statements as written

VC-06Hu.tdb: V8C7, type code %, sha256 b64d86a071f73e7b…

74: PHASE V8C7 % 2 1 0.875 !
75: CONST V8C7 : V : C : !

Example references (4 of 4; assessments first):

doi:10.1016/j.jallcom.2005.11.033 Jincheng Hu, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic re-assessment of the V–C system, Journal of Alloys and Compounds 421, 120-127 (2006).
assessment that models this phase; reports values for this phase
doi:10.1088/0953-8984/11/1/014 V N Lipatnikov, A I Gusev, P Ettmayer, W Lengauer, Phase transformations in non-stoichiometric vanadium carbide, J. Phys.: Condens. Matter 11, 163-184 (1999).
cited as the source of values for this phase
doi:10.1007/bf00547575 George H. Emmons, Wendell S. Williams, Thermodynamics of order-disorder transformations in vanadium carbide, J Mater Sci 18, 2589-2602 (1983).
cited as the source of values for this phase
doi:10.1103/physrevb.7.5041 L. W. Shacklette, Wendell S. Williams, Influence of Order-Disorder Transformations on the Electrical Resistivity of Vanadium Carbide, Phys. Rev. B 7, 5041-5053 (1973).
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}
}