Ni–V phases

12 phases (tier A 6, tier C 2, liquid 1, needs_review 3); 10 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 · Ni–V system page · Markdown · field reference

Phases of the Ni–V system (12)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:ni-v:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–3999.25 K, x(V) 0.74834–1	8	7
SIGMA_D8B phase:ni-v:d8b-sigma	sigma-CrFe · D8_b · tP30 · P4_2/mnm (136)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–1553 K, x(V) 0.46666–0.75047	8	6
DIS_SIGMA phase:ni-v:dis-sigma		needs_review	no calculated diagram	0	1
FCC_A1 phase:ni-v:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–1729.8 K, x(V) 0–0.46504	20	7
HCP_A3 phase:ni-v:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 6 calculated diagram(s)	0	7
LIQUID phase:ni-v:liquid	liquid	liquid	stable in 6 of 6 calculated diagram(s): 1459.93–4000 K, x(V) 0–1	9	7
NI2V phase:ni-v:ni2v	MoPt2 · oI6 · Immm (71)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 6 of 6 calculated diagram(s): 300–1208.99 K, x(V) 0.33333–0.33333	12	7
NI2V7_A15 phase:ni-v:ni2v7-a15		needs_review	stable in 2 of 2 calculated diagram(s): 300–1171.92 K, x(V) 0.77778–0.77778	2	2
NI3V_D022 phase:ni-v:ni3v-d022	Al3Ti · D0_22 · tI8 · I4/mmm (139)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–1333.8 K, x(V) 0.22708–0.27095	8	7
NI8V phase:ni-v:ni8v	Pt8Ti · tI18 · I4/mmm (139)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–678.03 K, x(V) 0.11111–0.11111	0	2
NIV3_A15 phase:ni-v:niv3-a15		needs_review	stable in 3 of 3 calculated diagram(s): 300–1200 K, x(V) 0.74999–0.775	0	4
SIGMA_OLD phase:ni-v:old-sigma	sigma-CrFe · D8_b · tP30 · P4_2/mnm (136)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1553.16 K, x(V) 0.53199–0.73333	8	3

BCC_A2 (Ni–V)

Id: phase:ni-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 6 of 6 calculated diagram(s): 300–3999.25 K, x(V) 0.74834–1
Literature: 8 values (8 accepted) from 2 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:ni-v:bcc-a2
paper: paper:10.1016/j.tca.2018.01.020:bcc-(V), paper:10.1134/s0036024410050080:bcc
tdb: tdb:NiV-01Wat.tdb:BCC_A2, tdb:NiV-10Kab.tdb:BCC_A2, tdb:NiV-18Pan.tdb:BCC_A2, tdb:NiV-19Noo-full.tdb:BCC_A2, tdb:NiV-19Noo-simple.tdb:BCC_A2, tdb:NiV-19Zou.tdb:BCC_A2, tdb:NiV-98Kor-LB.tdb:BCC_A2

TDB models of BCC_A2 (7): PHASE and CONSTITUENT statements as written

NiV-01Wat.tdb: BCC_A2, type code %B, sha256 cd99dd38bf6fcab8…

49: PHASE BCC_A2 %B 2 1 3 !
50: CONST BCC_A2 : NI V% : VA : !

NiV-10Kab.tdb: BCC_A2, type code %B, sha256 328d1c8d6ac9314a…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : NI V% : VA : !

NiV-18Pan.tdb: BCC_A2, type code %B, sha256 18c5215f577364d8…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : NI V% : VA : !

NiV-19Noo-full.tdb: BCC_A2, type code %B, sha256 e44cbfbdf39108b1…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : NI V% : VA : !

NiV-19Noo-simple.tdb: BCC_A2, type code %B, sha256 280f505b819a27e3…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : NI V% : VA : !

NiV-19Zou.tdb: BCC_A2, type code %B, sha256 cab38dd7f44a0129…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : NI V% : VA : !

NiV-98Kor-LB.tdb: BCC_A2, type code %B, sha256 7b4eb525c5232690…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : NI V% : VA : !

Example references (7 of 7; assessments first):

doi:10.1016/j.tca.2018.01.020 Yafei Pan, Yong Du, Jian Lv, Tongxiang Liang, Fenghua Luo, Reassessment of the Ni–V system and a new thermodynamic modeling of the Mo–Ni–V system, Thermochimica Acta 661, 137-146 (2018).
assessment that models this phase; reports values for this phase
doi:10.1134/S0036024410050080 E.G. Kabanova, V.N. Kuznetsov, G.P. Zhmurko, Russ. J. Phys. Chem., 84, 755-59(2010).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2018.11.006 L. Zou, C. Guo, C. Li, Z. Du, Calphad, 64, 97-114(2019).
assessment that models this phase
doi:10.1016/j.calphad.2019.03.010 M. Noori, B. Hallstedt, Calphad, 65, 273-81(2019).
assessment that models this phase
doi:10.1016/S0925-8388(00)01472-9 A. Watson, F.H. Hayes, J. Alloys Compd., 320, 199-206(2001).
assessment that models this phase
doi:10.1007/bf02900242 E. R. Stevens, O. N. Carlson, V-Ni system, Metall Trans 1, 1267-1271 (1970).
cited as the source of values for this phase
doi:10.1007/pl00020645 H. A. Moreen, R. Taggart, D. H. Polonis, Ni8X phases in the systems Ni-V, Ni-V-Nb, and Ni-V-Ta, J Mater Sci 6, 1425-1432 (1971).
cited as the source of values for this phase

SIGMA_D8B (Ni–V)

Id: phase:ni-v: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 NiV-01Wat.tdb also describes the disordered state
Caveat: partitioned order/disorder model in NiV-18Pan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in NiV-19Noo-full.tdb also describes the disordered state
Caveat: partitioned order/disorder model in NiV-19Noo-simple.tdb also describes the disordered state
Caveat: partitioned order/disorder model in NiV-19Zou.tdb also describes the disordered state
Caveat: partitioned order/disorder model in NiV-98Kor-LB.tdb also describes the disordered state
Stability: stable in 5 of 5 calculated diagram(s): 300–1553 K, x(V) 0.46666–0.75047
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:ni-v:d8b-sigma
paper: paper:10.1016/j.tca.2018.01.020:σ
tdb: tdb:NiV-01Wat.tdb:SIGMA_D8B, tdb:NiV-18Pan.tdb:SIGMA_D8B, tdb:NiV-19Noo-full.tdb:SIGMA_D8B, tdb:NiV-19Noo-simple.tdb:SIGMA_D8B, tdb:NiV-19Zou.tdb:SIGMA_D8B, tdb:NiV-98Kor-LB.tdb:SIGMA_D8B

TDB models of SIGMA_D8B (6): PHASE and CONSTITUENT statements as written

NiV-01Wat.tdb: SIGMA_D8B, type code %, sha256 cd99dd38bf6fcab8…

79: PHASE SIGMA_D8B % 3 10 4 16 !
80: CONST SIGMA_D8B : NI V : V : NI V : !

NiV-18Pan.tdb: SIGMA_D8B, type code %, sha256 18c5215f577364d8…

58: PHASE SIGMA_D8B % 3 10 4 16 !
59: CONST SIGMA_D8B : NI V : V : NI V : !

NiV-19Noo-full.tdb: SIGMA_D8B, type code %P, sha256 e44cbfbdf39108b1…

63: PHASE SIGMA_D8B %P 5 2 4 8 8 8 !
64: CONST SIGMA_D8B : NI V : NI V : NI V : NI V : NI V : !

NiV-19Noo-simple.tdb: SIGMA_D8B, type code %, sha256 280f505b819a27e3…

58: PHASE SIGMA_D8B % 3 10 4 16 !
59: CONST SIGMA_D8B : NI V : NI V : NI V : !

NiV-19Zou.tdb: SIGMA_D8B, type code %, sha256 cab38dd7f44a0129…

59: PHASE SIGMA_D8B % 2 10 20 !
60: CONST SIGMA_D8B : NI% V : NI V% : !

NiV-98Kor-LB.tdb: SIGMA_D8B, type code %, sha256 7b4eb525c5232690…

66: PHASE SIGMA_D8B % 3 10 4 16 !
67: CONST SIGMA_D8B : NI V : V : NI V : !

Example references (6 of 6; assessments first):

doi:10.1016/j.tca.2018.01.020 Yafei Pan, Yong Du, Jian Lv, Tongxiang Liang, Fenghua Luo, Reassessment of the Ni–V system and a new thermodynamic modeling of the Mo–Ni–V system, Thermochimica Acta 661, 137-146 (2018).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2018.11.006 L. Zou, C. Guo, C. Li, Z. Du, Calphad, 64, 97-114(2019).
assessment that models this phase
doi:10.1016/j.calphad.2019.03.010 M. Noori, B. Hallstedt, Calphad, 65, 273-81(2019).
assessment that models this phase
doi:10.1016/S0925-8388(00)01472-9 A. Watson, F.H. Hayes, J. Alloys Compd., 320, 199-206(2001).
assessment that models this phase
doi:10.1007/bf02900242 E. R. Stevens, O. N. Carlson, V-Ni system, Metall Trans 1, 1267-1271 (1970).
cited as the source of values for this phase
doi:10.1007/pl00020645 H. A. Moreen, R. Taggart, D. H. Polonis, Ni8X phases in the systems Ni-V, Ni-V-Nb, and Ni-V-Ta, J Mater Sci 6, 1425-1432 (1971).
cited as the source of values for this phase

DIS_SIGMA (Ni–V)

Id: phase:ni-v:dis-sigma; status needs_review
No structure assigned. Why: unrecognised_name_tokens:DIS
Candidate (name_token): sigma-CrFe · D8_b · tP30 · P4_2/mnm (136) — Strukturbericht/word 'D8B' in the TDB name
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ni-v:dis-sigma
tdb: tdb:NiV-19Noo-full.tdb:DIS_SIGMA

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

NiV-19Noo-full.tdb: DIS_SIGMA, type code %, sha256 e44cbfbdf39108b1…

58: PHASE DIS_SIGMA % 1 1 !
59: CONST DIS_SIGMA : NI V : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2019.03.010 M. Noori, B. Hallstedt, Calphad, 65, 273-81(2019).
assessment that models this phase

FCC_A1 (Ni–V)

Id: phase:ni-v: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 6 of 6 calculated diagram(s): 300–1729.8 K, x(V) 0–0.46504
Literature: 20 values (20 accepted) from 2 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:ni-v:fcc-a1
paper: paper:10.1016/j.tca.2018.01.020:fcc-(Ni), paper:10.1134/s0036024410050080:fcc
tdb: tdb:NiV-01Wat.tdb:FCC_A1, tdb:NiV-10Kab.tdb:FCC_A1, tdb:NiV-18Pan.tdb:FCC_A1, tdb:NiV-19Noo-full.tdb:FCC_A1, tdb:NiV-19Noo-simple.tdb:FCC_A1, tdb:NiV-19Zou.tdb:FCC_A1, tdb:NiV-98Kor-LB.tdb:FCC_A1

TDB models of FCC_A1 (7): PHASE and CONSTITUENT statements as written

NiV-01Wat.tdb: FCC_A1, type code %A, sha256 cd99dd38bf6fcab8…

44: PHASE FCC_A1 %A 2 1 1 !
45: CONST FCC_A1 : NI% V : VA : !

NiV-10Kab.tdb: FCC_A1, type code %A, sha256 328d1c8d6ac9314a…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : NI% V : VA : !

NiV-18Pan.tdb: FCC_A1, type code %A, sha256 18c5215f577364d8…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : NI% V : VA : !

NiV-19Noo-full.tdb: FCC_A1, type code %A, sha256 e44cbfbdf39108b1…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : NI% V : VA : !

NiV-19Noo-simple.tdb: FCC_A1, type code %A, sha256 280f505b819a27e3…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : NI% V : VA : !

NiV-19Zou.tdb: FCC_A1, type code %A, sha256 cab38dd7f44a0129…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : NI% V : VA : !

NiV-98Kor-LB.tdb: FCC_A1, type code %A, sha256 7b4eb525c5232690…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : NI% V : VA : !

Example references (7 of 7; assessments first):

doi:10.1016/j.tca.2018.01.020 Yafei Pan, Yong Du, Jian Lv, Tongxiang Liang, Fenghua Luo, Reassessment of the Ni–V system and a new thermodynamic modeling of the Mo–Ni–V system, Thermochimica Acta 661, 137-146 (2018).
assessment that models this phase; reports values for this phase
doi:10.1134/S0036024410050080 E.G. Kabanova, V.N. Kuznetsov, G.P. Zhmurko, Russ. J. Phys. Chem., 84, 755-59(2010).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2018.11.006 L. Zou, C. Guo, C. Li, Z. Du, Calphad, 64, 97-114(2019).
assessment that models this phase
doi:10.1016/j.calphad.2019.03.010 M. Noori, B. Hallstedt, Calphad, 65, 273-81(2019).
assessment that models this phase
doi:10.1016/S0925-8388(00)01472-9 A. Watson, F.H. Hayes, J. Alloys Compd., 320, 199-206(2001).
assessment that models this phase
doi:10.1007/bf02900242 E. R. Stevens, O. N. Carlson, V-Ni system, Metall Trans 1, 1267-1271 (1970).
cited as the source of values for this phase
doi:10.1007/pl00020645 H. A. Moreen, R. Taggart, D. H. Polonis, Ni8X phases in the systems Ni-V, Ni-V-Nb, and Ni-V-Ta, J Mater Sci 6, 1425-1432 (1971).
cited as the source of values for this phase

HCP_A3 (Ni–V)

Id: phase:ni-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: not stable in 6 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:ni-v:hcp-a3
tdb: tdb:NiV-01Wat.tdb:HCP_A3, tdb:NiV-10Kab.tdb:HCP_A3, tdb:NiV-18Pan.tdb:HCP_A3, tdb:NiV-19Noo-full.tdb:HCP_A3, tdb:NiV-19Noo-simple.tdb:HCP_A3, tdb:NiV-19Zou.tdb:HCP_A3, tdb:NiV-98Kor-LB.tdb:HCP_A3

TDB models of HCP_A3 (7): PHASE and CONSTITUENT statements as written

NiV-01Wat.tdb: HCP_A3, type code %A, sha256 cd99dd38bf6fcab8…

54: PHASE HCP_A3 %A 2 1 0.5 !
55: CONST HCP_A3 : NI V : VA : !

NiV-10Kab.tdb: HCP_A3, type code %A, sha256 328d1c8d6ac9314a…

41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : NI V : VA : !

NiV-18Pan.tdb: HCP_A3, type code %A, sha256 18c5215f577364d8…

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

NiV-19Noo-full.tdb: HCP_A3, type code %A, sha256 e44cbfbdf39108b1…

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

NiV-19Noo-simple.tdb: HCP_A3, type code %A, sha256 280f505b819a27e3…

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

NiV-19Zou.tdb: HCP_A3, type code %A, sha256 cab38dd7f44a0129…

39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : NI V : VA : !

NiV-98Kor-LB.tdb: HCP_A3, type code %A, sha256 7b4eb525c5232690…

41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : NI V : VA : !

Example references (5 of 5; assessments first):

doi:10.1016/j.calphad.2018.11.006 L. Zou, C. Guo, C. Li, Z. Du, Calphad, 64, 97-114(2019).
assessment that models this phase
doi:10.1016/j.calphad.2019.03.010 M. Noori, B. Hallstedt, Calphad, 65, 273-81(2019).
assessment that models this phase
doi:10.1016/j.tca.2018.01.020 Yafei Pan, Yong Du, Jian Lv, Tongxiang Liang, Fenghua Luo, Reassessment of the Ni–V system and a new thermodynamic modeling of the Mo–Ni–V system, Thermochimica Acta 661, 137-146 (2018).
assessment that models this phase
doi:10.1016/S0925-8388(00)01472-9 A. Watson, F.H. Hayes, J. Alloys Compd., 320, 199-206(2001).
assessment that models this phase
doi:10.1134/S0036024410050080 E.G. Kabanova, V.N. Kuznetsov, G.P. Zhmurko, Russ. J. Phys. Chem., 84, 755-59(2010).
assessment that models this phase

LIQUID (Ni–V)

Id: phase:ni-v:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 6 of 6 calculated diagram(s): 1459.93–4000 K, x(V) 0–1
Literature: 9 values (9 accepted) from 2 papers
Interactive: phase registry entry

Names (11): corpus: corpus:phase:ni-v:liquid
paper: paper:10.1016/j.tca.2018.01.020:L, paper:10.1016/j.tca.2018.01.020:liquid, paper:10.1134/s0036024410050080:L
tdb: tdb:NiV-01Wat.tdb:LIQUID, tdb:NiV-10Kab.tdb:LIQUID, tdb:NiV-18Pan.tdb:LIQUID, tdb:NiV-19Noo-full.tdb:LIQUID, tdb:NiV-19Noo-simple.tdb:LIQUID, tdb:NiV-19Zou.tdb:LIQUID, tdb:NiV-98Kor-LB.tdb:LIQUID

TDB models of LIQUID (7): PHASE and CONSTITUENT statements as written

NiV-01Wat.tdb: LIQUID, type code %, sha256 cd99dd38bf6fcab8…

39: PHASE LIQUID:L % 1 1 !
40: CONST LIQUID:L : NI V : !

NiV-10Kab.tdb: LIQUID, type code %, sha256 328d1c8d6ac9314a…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : NI V : !

NiV-18Pan.tdb: LIQUID, type code %, sha256 18c5215f577364d8…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : NI V : !

NiV-19Noo-full.tdb: LIQUID, type code %, sha256 e44cbfbdf39108b1…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : NI V : !

NiV-19Noo-simple.tdb: LIQUID, type code %, sha256 280f505b819a27e3…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : NI V : !

NiV-19Zou.tdb: LIQUID, type code %, sha256 cab38dd7f44a0129…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : NI V : !

NiV-98Kor-LB.tdb: LIQUID, type code %, sha256 7b4eb525c5232690…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : NI V : !

Example references (7 of 7; assessments first):

doi:10.1016/j.tca.2018.01.020 Yafei Pan, Yong Du, Jian Lv, Tongxiang Liang, Fenghua Luo, Reassessment of the Ni–V system and a new thermodynamic modeling of the Mo–Ni–V system, Thermochimica Acta 661, 137-146 (2018).
assessment that models this phase; reports values for this phase
doi:10.1134/S0036024410050080 E.G. Kabanova, V.N. Kuznetsov, G.P. Zhmurko, Russ. J. Phys. Chem., 84, 755-59(2010).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2018.11.006 L. Zou, C. Guo, C. Li, Z. Du, Calphad, 64, 97-114(2019).
assessment that models this phase
doi:10.1016/j.calphad.2019.03.010 M. Noori, B. Hallstedt, Calphad, 65, 273-81(2019).
assessment that models this phase
doi:10.1016/S0925-8388(00)01472-9 A. Watson, F.H. Hayes, J. Alloys Compd., 320, 199-206(2001).
assessment that models this phase
doi:10.1007/bf02900242 E. R. Stevens, O. N. Carlson, V-Ni system, Metall Trans 1, 1267-1271 (1970).
cited as the source of values for this phase
doi:10.1007/pl00020645 H. A. Moreen, R. Taggart, D. H. Polonis, Ni8X phases in the systems Ni-V, Ni-V-Nb, and Ni-V-Ta, J Mater Sci 6, 1425-1432 (1971).
cited as the source of values for this phase

NI2V (Ni–V)

Id: phase:ni-v:ni2v; status assigned
Structure: MoPt2 · oI6 · Immm (71); type st:mopt2-oi6; 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 6 of 6 calculated diagram(s): 300–1208.99 K, x(V) 0.33333–0.33333
Literature: 12 values (12 accepted) from 2 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:ni-v:ni2v
paper: paper:10.1016/j.tca.2018.01.020:Ni2V, paper:10.1134/s0036024410050080:Ni2V
tdb: tdb:NiV-01Wat.tdb:NI2V, tdb:NiV-10Kab.tdb:NI2V, tdb:NiV-18Pan.tdb:NI2V, tdb:NiV-19Noo-full.tdb:NI2V, tdb:NiV-19Noo-simple.tdb:NI2V, tdb:NiV-19Zou.tdb:NI2V, tdb:NiV-98Kor-LB.tdb:NI2V

TDB models of NI2V (7): PHASE and CONSTITUENT statements as written

NiV-01Wat.tdb: NI2V, type code %, sha256 cd99dd38bf6fcab8…

64: PHASE NI2V % 2 2 1 !
65: CONST NI2V : NI : V : !

NiV-10Kab.tdb: NI2V, type code %, sha256 328d1c8d6ac9314a…

51: PHASE NI2V % 2 2 1 !
52: CONST NI2V : NI : V : !

NiV-18Pan.tdb: NI2V, type code %, sha256 18c5215f577364d8…

48: PHASE NI2V % 2 2 1 !
49: CONST NI2V : NI : V : !

NiV-19Noo-full.tdb: NI2V, type code %, sha256 e44cbfbdf39108b1…

53: PHASE NI2V % 2 2 1 !
54: CONST NI2V : NI% V : NI V% : !

NiV-19Noo-simple.tdb: NI2V, type code %, sha256 280f505b819a27e3…

53: PHASE NI2V % 2 2 1 !
54: CONST NI2V : NI : V : !

NiV-19Zou.tdb: NI2V, type code %, sha256 cab38dd7f44a0129…

49: PHASE NI2V % 2 2 1 !
50: CONST NI2V : NI : V : !

NiV-98Kor-LB.tdb: NI2V, type code %, sha256 7b4eb525c5232690…

51: PHASE NI2V % 2 2 1 !
52: CONST NI2V : NI : V : !

Example references (7 of 7; assessments first):

doi:10.1016/j.tca.2018.01.020 Yafei Pan, Yong Du, Jian Lv, Tongxiang Liang, Fenghua Luo, Reassessment of the Ni–V system and a new thermodynamic modeling of the Mo–Ni–V system, Thermochimica Acta 661, 137-146 (2018).
assessment that models this phase; reports values for this phase
doi:10.1134/S0036024410050080 E.G. Kabanova, V.N. Kuznetsov, G.P. Zhmurko, Russ. J. Phys. Chem., 84, 755-59(2010).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2018.11.006 L. Zou, C. Guo, C. Li, Z. Du, Calphad, 64, 97-114(2019).
assessment that models this phase
doi:10.1016/j.calphad.2019.03.010 M. Noori, B. Hallstedt, Calphad, 65, 273-81(2019).
assessment that models this phase
doi:10.1016/S0925-8388(00)01472-9 A. Watson, F.H. Hayes, J. Alloys Compd., 320, 199-206(2001).
assessment that models this phase
doi:10.1007/bf02900242 E. R. Stevens, O. N. Carlson, V-Ni system, Metall Trans 1, 1267-1271 (1970).
cited as the source of values for this phase
doi:10.1007/pl00020645 H. A. Moreen, R. Taggart, D. H. Polonis, Ni8X phases in the systems Ni-V, Ni-V-Nb, and Ni-V-Ta, J Mater Sci 6, 1425-1432 (1971).
cited as the source of values for this phase

NI2V7_A15 (Ni–V)

Id: phase:ni-v:ni2v7-a15; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_A15; stoichiometry_contradicts_A15:NiV-18Pan.tdb; stoichiometry_contradicts_A15:NiV-98Kor-LB.tdb
Candidate (literature_printed): Cr3Si · cP8 — printed with a label mapped to this phase
Candidate (name_token): Cr3Si · A15 · cP8 · Pm-3n (223) — Strukturbericht/word 'A15' in the TDB name
Candidate (sgte_mmc2): Cr3Si · A15 · cP8 · Pm-3n (223) — Hallstedt 2025 mmc2 row for NI2V7_A15: Ni2V7
Candidate (tdb_comment): Cr3Si · cP8 · Pm-3n — NiV-18Pan.tdb: 'Prototype Cr3Si (cP8, Pm-3n)'
Candidate (tdb_comment): Cr3Si · cP8 · Pm-3n — NiV-98Kor-LB.tdb: 'Prototype Cr3Si (cP8, Pm-3n)'
Stoichiometry: Ni 0.2222, V 0.7778
Stability: stable in 2 of 2 calculated diagram(s): 300–1171.92 K, x(V) 0.77778–0.77778
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ni-v:ni2v7-a15
paper: paper:10.1016/j.tca.2018.01.020:Ni2V7
tdb: tdb:NiV-18Pan.tdb:NI2V7_A15, tdb:NiV-98Kor-LB.tdb:NI2V7_A15

TDB models of NI2V7_A15 (2): PHASE and CONSTITUENT statements as written

NiV-18Pan.tdb: NI2V7_A15, type code %, sha256 18c5215f577364d8…

53: PHASE NI2V7_A15 % 2 2 7 !
54: CONST NI2V7_A15 : NI : V : !

NiV-98Kor-LB.tdb: NI2V7_A15, type code %, sha256 7b4eb525c5232690…

56: PHASE NI2V7_A15 % 2 2 7 !
57: CONST NI2V7_A15 : NI : V : !

Example references (3 of 3; assessments first):

doi:10.1016/j.tca.2018.01.020 Yafei Pan, Yong Du, Jian Lv, Tongxiang Liang, Fenghua Luo, Reassessment of the Ni–V system and a new thermodynamic modeling of the Mo–Ni–V system, Thermochimica Acta 661, 137-146 (2018).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02900242 E. R. Stevens, O. N. Carlson, V-Ni system, Metall Trans 1, 1267-1271 (1970).
cited as the source of values for this phase
doi:10.1007/pl00020645 H. A. Moreen, R. Taggart, D. H. Polonis, Ni8X phases in the systems Ni-V, Ni-V-Nb, and Ni-V-Ta, J Mater Sci 6, 1425-1432 (1971).
cited as the source of values for this phase

NI3V_D022 (Ni–V)

Id: phase:ni-v:ni3v-d022; status assigned
Structure: Al3Ti · D0_22 · tI8 · I4/mmm (139); type st:d0-22-al3ti-ti8; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in NiV-01Wat.tdb also describes the disordered state
Caveat: partitioned order/disorder model in NiV-10Kab.tdb also describes the disordered state
Caveat: partitioned order/disorder model in NiV-18Pan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in NiV-19Noo-full.tdb also describes the disordered state
Caveat: partitioned order/disorder model in NiV-19Noo-simple.tdb also describes the disordered state
Caveat: partitioned order/disorder model in NiV-19Zou.tdb also describes the disordered state
Stability: stable in 6 of 6 calculated diagram(s): 300–1333.8 K, x(V) 0.22708–0.27095
Literature: 8 values (8 accepted) from 2 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:ni-v:ni3v-d022
paper: paper:10.1016/j.tca.2018.01.020:Ni3V, paper:10.1134/s0036024410050080:Ni3V
tdb: tdb:NiV-01Wat.tdb:NI3V_D022, tdb:NiV-10Kab.tdb:NI3V_D022, tdb:NiV-18Pan.tdb:NI3V_D022, tdb:NiV-19Noo-full.tdb:NI3V_D022, tdb:NiV-19Noo-simple.tdb:NI3V_D022, tdb:NiV-19Zou.tdb:NI3V_D022, tdb:NiV-98Kor-LB.tdb:NI3V_D022

TDB models of NI3V_D022 (7): PHASE and CONSTITUENT statements as written

NiV-01Wat.tdb: NI3V_D022, type code %, sha256 cd99dd38bf6fcab8…

59: PHASE NI3V_D022 % 2 3 1 !
60: CONST NI3V_D022 : NI% V : NI V% : !

NiV-10Kab.tdb: NI3V_D022, type code %, sha256 328d1c8d6ac9314a…

46: PHASE NI3V_D022 % 2 3 1 !
47: CONST NI3V_D022 : NI% V : NI V% : !

NiV-18Pan.tdb: NI3V_D022, type code %, sha256 18c5215f577364d8…

43: PHASE NI3V_D022 % 2 3 1 !
44: CONST NI3V_D022 : NI% V : NI V% : !

NiV-19Noo-full.tdb: NI3V_D022, type code %, sha256 e44cbfbdf39108b1…

48: PHASE NI3V_D022 % 2 3 1 !
49: CONST NI3V_D022 : NI% V : NI V% : !

NiV-19Noo-simple.tdb: NI3V_D022, type code %, sha256 280f505b819a27e3…

48: PHASE NI3V_D022 % 2 3 1 !
49: CONST NI3V_D022 : NI% V : NI V% : !

NiV-19Zou.tdb: NI3V_D022, type code %, sha256 cab38dd7f44a0129…

44: PHASE NI3V_D022 % 2 3 1 !
45: CONST NI3V_D022 : NI% V : NI V% : !

NiV-98Kor-LB.tdb: NI3V_D022, type code %, sha256 7b4eb525c5232690…

46: PHASE NI3V_D022 % 2 3 1 !
47: CONST NI3V_D022 : NI : V : !

Example references (7 of 7; assessments first):

doi:10.1016/j.tca.2018.01.020 Yafei Pan, Yong Du, Jian Lv, Tongxiang Liang, Fenghua Luo, Reassessment of the Ni–V system and a new thermodynamic modeling of the Mo–Ni–V system, Thermochimica Acta 661, 137-146 (2018).
assessment that models this phase; reports values for this phase
doi:10.1134/S0036024410050080 E.G. Kabanova, V.N. Kuznetsov, G.P. Zhmurko, Russ. J. Phys. Chem., 84, 755-59(2010).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2018.11.006 L. Zou, C. Guo, C. Li, Z. Du, Calphad, 64, 97-114(2019).
assessment that models this phase
doi:10.1016/j.calphad.2019.03.010 M. Noori, B. Hallstedt, Calphad, 65, 273-81(2019).
assessment that models this phase
doi:10.1016/S0925-8388(00)01472-9 A. Watson, F.H. Hayes, J. Alloys Compd., 320, 199-206(2001).
assessment that models this phase
doi:10.1007/bf02900242 E. R. Stevens, O. N. Carlson, V-Ni system, Metall Trans 1, 1267-1271 (1970).
cited as the source of values for this phase
doi:10.1007/pl00020645 H. A. Moreen, R. Taggart, D. H. Polonis, Ni8X phases in the systems Ni-V, Ni-V-Nb, and Ni-V-Ta, J Mater Sci 6, 1425-1432 (1971).
cited as the source of values for this phase

NI8V (Ni–V)

Id: phase:ni-v:ni8v; status assigned
Structure: Pt8Ti · tI18 · I4/mmm (139); type st:pt8ti-ti18; 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): 300–678.03 K, x(V) 0.11111–0.11111
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ni-v:ni8v
tdb: tdb:NiV-19Noo-full.tdb:NI8V, tdb:NiV-19Noo-simple.tdb:NI8V

TDB models of NI8V (2): PHASE and CONSTITUENT statements as written

NiV-19Noo-full.tdb: NI8V, type code %, sha256 e44cbfbdf39108b1…

43: PHASE NI8V % 3 8 8 2 !
44: CONST NI8V : NI% V : NI% V : NI V% : !

NiV-19Noo-simple.tdb: NI8V, type code %, sha256 280f505b819a27e3…

43: PHASE NI8V % 2 8 1 !
44: CONST NI8V : NI : V : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2019.03.010 M. Noori, B. Hallstedt, Calphad, 65, 273-81(2019).
assessment that models this phase

NIV3_A15 (Ni–V)

Id: phase:ni-v:niv3-a15; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:models_disagree_on_composition; models_disagree_on_composition; stoichiometry_contradicts_A15:NiV-01Wat.tdb
Candidate (dft_mp): Pm-3n (223) — on-hull MP V3Ni at x(V)=0.7500
Candidate (dft_oqmd): Pm-3n (223) — on-hull OQMD Ni1 V3 at x(V)=0.7500
Candidate (name_token): Cr3Si · A15 · cP8 · Pm-3n (223) — Strukturbericht/word 'A15' in the TDB name
Candidate (sgte_mmc2): Cr3Si · A15 · cP8 · Pm-3n (223) — Hallstedt 2025 mmc2 row for NIV3_A15: NiV3
Candidate (tdb_comment): Cr3Si · cP8 · Pm-3n — NiV-01Wat.tdb: 'Prototype Cr3Si (cP8, Pm-3n)'
Candidate (tdb_comment): Cr3Si · cP8 · Pm-3n — NiV-19Noo-full.tdb: 'Prototype Cr3Si (cP8, Pm-3n)'
Candidate (tdb_comment): Cr3Si · cP8 · Pm-3n — NiV-19Noo-simple.tdb: 'Prototype Cr3Si (cP8, Pm-3n)'
Candidate (tdb_comment): Cr3Si · cP8 · Pm-3n — NiV-19Zou.tdb: 'Prototype Cr3Si (cP8, Pm-3n)'
Stability: stable in 3 of 3 calculated diagram(s): 300–1200 K, x(V) 0.74999–0.775
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ni-v:niv3-a15
tdb: tdb:NiV-01Wat.tdb:NIV3_A15, tdb:NiV-19Noo-full.tdb:NIV3_A15, tdb:NiV-19Noo-simple.tdb:NIV3_A15, tdb:NiV-19Zou.tdb:NIV3_A15

TDB models of NIV3_A15 (4): PHASE and CONSTITUENT statements as written

NiV-01Wat.tdb: NIV3_A15, type code %, sha256 cd99dd38bf6fcab8…

69: PHASE NIV3_A15 % 2 0.225 0.775 !
70: CONST NIV3_A15 : NI : V : !

NiV-19Noo-full.tdb: NIV3_A15, type code %, sha256 e44cbfbdf39108b1…

68: PHASE NIV3_A15 % 2 1 3 !
69: CONST NIV3_A15 : NI% V : NI V% : !

NiV-19Noo-simple.tdb: NIV3_A15, type code %, sha256 280f505b819a27e3…

63: PHASE NIV3_A15 % 2 1 3 !
64: CONST NIV3_A15 : NI% V : NI V% : !

NiV-19Zou.tdb: NIV3_A15, type code %, sha256 cab38dd7f44a0129…

54: PHASE NIV3_A15 % 2 1 3 !
55: CONST NIV3_A15 : NI : V : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2018.11.006 L. Zou, C. Guo, C. Li, Z. Du, Calphad, 64, 97-114(2019).
assessment that models this phase
doi:10.1016/j.calphad.2019.03.010 M. Noori, B. Hallstedt, Calphad, 65, 273-81(2019).
assessment that models this phase
doi:10.1016/S0925-8388(00)01472-9 A. Watson, F.H. Hayes, J. Alloys Compd., 320, 199-206(2001).
assessment that models this phase

SIGMA_OLD (Ni–V)

Id: phase:ni-v:old-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
Stability: stable in 3 of 3 calculated diagram(s): 300–1553.16 K, x(V) 0.53199–0.73333
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:ni-v:old-sigma, corpus:phase:ni-v:sigma-old
paper: paper:10.1134/s0036024410050080:σ
tdb: tdb:NiV-01Wat.tdb:SIGMA_OLD, tdb:NiV-10Kab.tdb:SIGMA_OLD, tdb:NiV-98Kor-LB.tdb:SIGMA_OLD

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

NiV-01Wat.tdb: SIGMA_OLD, type code %, sha256 cd99dd38bf6fcab8…

74: PHASE SIGMA_OLD % 3 8 4 18 !
75: CONST SIGMA_OLD : NI : V : NI V : !

NiV-10Kab.tdb: SIGMA_OLD, type code %, sha256 328d1c8d6ac9314a…

61: PHASE SIGMA_OLD % 3 8 4 18 !
62: CONST SIGMA_OLD : NI : V : NI V : !

NiV-98Kor-LB.tdb: SIGMA_OLD, type code %, sha256 7b4eb525c5232690…

61: PHASE SIGMA_OLD % 3 8 4 18 !
62: CONST SIGMA_OLD : NI : V : NI V : !

Example references (2 of 2; assessments first):

doi:10.1134/S0036024410050080 E.G. Kabanova, V.N. Kuznetsov, G.P. Zhmurko, Russ. J. Phys. Chem., 84, 755-59(2010).
assessment that models this phase; reports values for this phase
doi:10.1016/S0925-8388(00)01472-9 A. Watson, F.H. Hayes, J. Alloys Compd., 320, 199-206(2001).
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}
}