O–V phases

23 phases (tier A 4, tier C 8, liquid 2, gas 1, needs_review 8); 0 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 O–V system (23)
Phase	Structure	Basis	Stability (calculated)	TDB models
HALITE_B1 phase:o-v:b1-halite	NaCl · B1 · cF8 · Fm-3m (225)	tier A: standard phase name	no calculated diagram	2
BCC_A2 phase:o-v:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	no calculated diagram	2
RUTILE_C4 phase:o-v:c4-rutile		needs_review	no calculated diagram	2
CORUNDUM_D51 phase:o-v:d51-corundum	alpha-Al2O3 · D5_1 · hR10 · R-3c (167)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	no calculated diagram	2
FCC_A1 phase:o-v:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	no calculated diagram	2
HCP_A3 phase:o-v:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	no calculated diagram	2
ION phase:o-v:ion	liquid	liquid	no calculated diagram	2
LIQUID phase:o-v:liquid	liquid	liquid	no calculated diagram	2
O2GAS phase:o-v:o2gas	gas	gas	no calculated diagram	2
V2O phase:o-v:v2o	V7O3 · mC20 · C2/m (12)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	no calculated diagram	2
V2O5 phase:o-v:v2o5	V2O5 · oP14 · Pmmn (59)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	no calculated diagram	2
V3O5_HT phase:o-v:v3o5-ht		needs_review	no calculated diagram	2
V3O5_LT phase:o-v:v3o5-lt		needs_review	no calculated diagram	2
V3O7 phase:o-v:v3o7	V3O7 · mC120 · C2/c (15)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	no calculated diagram	2
V4O7 phase:o-v:v4o7		needs_review	no calculated diagram	2
V52O64 phase:o-v:v52o64	V13O16 · tI116 · I4_1/amd (141)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	no calculated diagram	2
V5O9 phase:o-v:v5o9	Ti5O9 · aP28 · P-1 (2)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	no calculated diagram	2
V6O11 phase:o-v:v6o11		needs_review	no calculated diagram	2
V6O13 phase:o-v:v6o13	V6O13 · mC38 · C2/m (12)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	no calculated diagram	2
V7O13 phase:o-v:v7o13	Ti7O13 · aP40 · P-1 (2)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	no calculated diagram	2
V8O15 phase:o-v:v8o15		needs_review	no calculated diagram	2
VO_BETA phase:o-v:vo-beta		needs_review	no calculated diagram	2
VO2_LT phase:o-v:vo2		needs_review	no calculated diagram	2

HALITE_B1 (O–V)

Id: phase:o-v:b1-halite; status assigned
Structure: NaCl · B1 · cF8 · Fm-3m (225); type st:b1-nacl-cf8; tier A: standard phase name; confidence high
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:b1-halite
tdb: tdb:VO-15Yan-ver1.tdb:HALITE_B1, tdb:VO-15Yan-ver2.tdb:HALITE_B1

TDB models of HALITE_B1 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: HALITE_B1, type code %, sha256 e26d540d6bb84d67…

74: PHASE HALITE_B1:I % 2 1 1 !
75: CONST HALITE_B1:I : V V+2% V+3 VA : O-2% VA : !

VO-15Yan-ver2.tdb: HALITE_B1, type code %, sha256 a7dd3bc52b4ee650…

74: PHASE HALITE_B1:I % 2 1 1 !
75: CONST HALITE_B1:I : V V+2% V+3 VA : O-2% VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

BCC_A2 (O–V)

Id: phase:o-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: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:bcc-a2
tdb: tdb:VO-15Yan-ver1.tdb:BCC_A2, tdb:VO-15Yan-ver2.tdb:BCC_A2

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

VO-15Yan-ver1.tdb: BCC_A2, type code %B, sha256 e26d540d6bb84d67…

54: PHASE BCC_A2 %B 2 1 3 !
55: CONST BCC_A2 : V : O VA% : !

VO-15Yan-ver2.tdb: BCC_A2, type code %B, sha256 a7dd3bc52b4ee650…

54: PHASE BCC_A2 %B 2 1 3 !
55: CONST BCC_A2 : V : O VA% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

RUTILE_C4 (O–V)

Id: phase:o-v:c4-rutile; status needs_review
No structure assigned. Why: unrecognised_name_tokens:RUTILE
Candidate (name_token): TiO2 · C4 · tP6 · P4_2/mnm (136) — Strukturbericht/word 'C4' in the TDB name
Candidate (sgte_mmc2): TiO2 · C4 · tP6 · P4_2/mnm (136) — Hallstedt 2025 mmc2 row for RUTILE_C4: TiO2 (rutile)
Candidate (sgte_mmc2): TiO2 · C4 · tP6 · P4_2/mnm (136) — Hallstedt 2025 mmc2 row for RUTILE_C4: TiO2 (rutile), VO2-ht
Candidate (tdb_comment): TiO2 · tP6 · P4_2/mnm — VO-15Yan-ver1.tdb: 'Prototype TiO2 (tP6, P4_2/mnm)'
Candidate (tdb_comment): TiO2 · tP6 · P4_2/mnm — VO-15Yan-ver2.tdb: 'Prototype TiO2 (tP6, P4_2/mnm)'
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:c4-rutile
tdb: tdb:VO-15Yan-ver1.tdb:RUTILE_C4, tdb:VO-15Yan-ver2.tdb:RUTILE_C4

TDB models of RUTILE_C4 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: RUTILE_C4, type code %, sha256 e26d540d6bb84d67…

129: PHASE RUTILE_C4:I % 2 1 2 !
130: CONST RUTILE_C4:I : V+4 : O-2 : !

VO-15Yan-ver2.tdb: RUTILE_C4, type code %, sha256 a7dd3bc52b4ee650…

129: PHASE RUTILE_C4:I % 2 1 2 !
130: CONST RUTILE_C4:I : V+4 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

CORUNDUM_D51 (O–V)

Id: phase:o-v:d51-corundum; status assigned
Structure: alpha-Al2O3 · D5_1 · hR10 · R-3c (167); type st:d5-1-alpha-al2o3-hr10; 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 (unrecognised_name_tokens:CORUNDUM); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:d51-corundum
tdb: tdb:VO-15Yan-ver1.tdb:CORUNDUM_D51, tdb:VO-15Yan-ver2.tdb:CORUNDUM_D51

TDB models of CORUNDUM_D51 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: CORUNDUM_D51, type code %A, sha256 e26d540d6bb84d67…

84: PHASE CORUNDUM_D51:I %A 2 2 3 !
85: CONST CORUNDUM_D51:I : V+3% V+4 VA : O-2 : !

VO-15Yan-ver2.tdb: CORUNDUM_D51, type code %A, sha256 a7dd3bc52b4ee650…

84: PHASE CORUNDUM_D51:I %A 3 2 3 1 !
85: CONST CORUNDUM_D51:I : V+2 V+3% V+4 VA : O-2 : VA% O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

FCC_A1 (O–V)

Id: phase:o-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: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:fcc-a1
tdb: tdb:VO-15Yan-ver1.tdb:FCC_A1, tdb:VO-15Yan-ver2.tdb:FCC_A1

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

VO-15Yan-ver1.tdb: FCC_A1, type code %A, sha256 e26d540d6bb84d67…

49: PHASE FCC_A1 %A 2 1 1 !
50: CONST FCC_A1 : V : O VA% : !

VO-15Yan-ver2.tdb: FCC_A1, type code %A, sha256 a7dd3bc52b4ee650…

49: PHASE FCC_A1 %A 2 1 1 !
50: CONST FCC_A1 : V : O VA% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

HCP_A3 (O–V)

Id: phase:o-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: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:hcp-a3
tdb: tdb:VO-15Yan-ver1.tdb:HCP_A3, tdb:VO-15Yan-ver2.tdb:HCP_A3

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

VO-15Yan-ver1.tdb: HCP_A3, type code %A, sha256 e26d540d6bb84d67…

59: PHASE HCP_A3 %A 2 1 0.5 !
60: CONST HCP_A3 : V : O VA : !

VO-15Yan-ver2.tdb: HCP_A3, type code %A, sha256 a7dd3bc52b4ee650…

59: PHASE HCP_A3 %A 2 1 0.5 !
60: CONST HCP_A3 : V : O VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

ION (O–V)

Id: phase:o-v:ion; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:ion
tdb: tdb:VO-15Yan-ver1.tdb:ION, tdb:VO-15Yan-ver2.tdb:ION

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

VO-15Yan-ver1.tdb: ION, type code %, sha256 e26d540d6bb84d67…

41: PHASE ION:Y % 2 1 1 !
42: CONST ION:Y : V+2 : O-2 VA VO1.5 VO2 VO2.5 : !

VO-15Yan-ver2.tdb: ION, type code %, sha256 a7dd3bc52b4ee650…

41: PHASE ION:Y % 2 1 1 !
42: CONST ION:Y : V+2 : O-2 VA VO1.5 VO2 VO2.5 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

LIQUID (O–V)

Id: phase:o-v:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stoichiometry: V 1.0000
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:liquid
tdb: tdb:VO-15Yan-ver1.tdb:LIQUID, tdb:VO-15Yan-ver2.tdb:LIQUID

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

VO-15Yan-ver1.tdb: LIQUID, type code %, sha256 e26d540d6bb84d67…

44: PHASE LIQUID:L % 1 1 !
45: CONST LIQUID:L : V : !

VO-15Yan-ver2.tdb: LIQUID, type code %, sha256 a7dd3bc52b4ee650…

44: PHASE LIQUID:L % 1 1 !
45: CONST LIQUID:L : V : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

O2GAS (O–V)

Id: phase:o-v:o2gas; status assigned
Structure: gas; type st:gas; gas; confidence high
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:o2gas
tdb: tdb:VO-15Yan-ver1.tdb:O2GAS, tdb:VO-15Yan-ver2.tdb:O2GAS

TDB models of O2GAS (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: O2GAS, type code %, sha256 e26d540d6bb84d67…

147: PHASE O2GAS % 1 1 !
148: CONST O2GAS : O2 : !

VO-15Yan-ver2.tdb: O2GAS, type code %, sha256 a7dd3bc52b4ee650…

147: PHASE O2GAS % 1 1 !
148: CONST O2GAS : O2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V2O (O–V)

Id: phase:o-v:v2o; status assigned
Structure: V7O3 · mC20 · C2/m (12); type st:v7o3-mc20; 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: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v2o
tdb: tdb:VO-15Yan-ver1.tdb:V2O, tdb:VO-15Yan-ver2.tdb:V2O

TDB models of V2O (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V2O, type code %A, sha256 e26d540d6bb84d67…

69: PHASE V2O %A 2 1 0.5 !
70: CONST V2O : V : O VA : !

VO-15Yan-ver2.tdb: V2O, type code %A, sha256 a7dd3bc52b4ee650…

69: PHASE V2O %A 2 1 0.5 !
70: CONST V2O : V : O VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V2O5 (O–V)

Id: phase:o-v:v2o5; status assigned
Structure: V2O5 · oP14 · Pmmn (59); type st:v2o5-op14; 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: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v2o5
tdb: tdb:VO-15Yan-ver1.tdb:V2O5, tdb:VO-15Yan-ver2.tdb:V2O5

TDB models of V2O5 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V2O5, type code %, sha256 e26d540d6bb84d67…

144: PHASE V2O5:I % 2 2 5 !
145: CONST V2O5:I : V+5 : O-2 : !

VO-15Yan-ver2.tdb: V2O5, type code %, sha256 a7dd3bc52b4ee650…

144: PHASE V2O5:I % 2 2 5 !
145: CONST V2O5:I : V+5 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V3O5_HT (O–V)

Id: phase:o-v:v3o5-ht; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model
Candidate (sgte_mmc2): V3O5-ht · mC32 · C2/c (15) — Hallstedt 2025 mmc2 row for V3O5_HT: V3O5-ht
Candidate (tdb_comment): V3O5-ht · mC32 · C2/c — VO-15Yan-ver1.tdb: 'Prototype V3O5-ht (mC32, C2/c)'
Candidate (tdb_comment): V3O5-ht · mC32 · C2/c — VO-15Yan-ver2.tdb: 'Prototype V3O5-ht (mC32, C2/c)'
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v3o5-ht
tdb: tdb:VO-15Yan-ver1.tdb:V3O5_HT, tdb:VO-15Yan-ver2.tdb:V3O5_HT

TDB models of V3O5_HT (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V3O5_HT, type code %, sha256 e26d540d6bb84d67…

94: PHASE V3O5_HT:I % 3 2 1 5 !
95: CONST V3O5_HT:I : V+3 : V+4 : O-2 : !

VO-15Yan-ver2.tdb: V3O5_HT, type code %, sha256 a7dd3bc52b4ee650…

94: PHASE V3O5_HT:I % 3 2 1 5 !
95: CONST V3O5_HT:I : V+3 : V+4 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V3O5_LT (O–V)

Id: phase:o-v:v3o5-lt; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model
Candidate (sgte_mmc2): V3O5-lt · mP32 · P2/c (13) — Hallstedt 2025 mmc2 row for V3O5_LT: V3O5-lt
Candidate (tdb_comment): V3O5-lt · mP32 · P2/c — VO-15Yan-ver1.tdb: 'Prototype V3O5-lt (mP32, P2/c)'
Candidate (tdb_comment): V3O5-lt · mP32 · P2/c — VO-15Yan-ver2.tdb: 'Prototype V3O5-lt (mP32, P2/c)'
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v3o5-lt
tdb: tdb:VO-15Yan-ver1.tdb:V3O5_LT, tdb:VO-15Yan-ver2.tdb:V3O5_LT

TDB models of V3O5_LT (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V3O5_LT, type code %, sha256 e26d540d6bb84d67…

89: PHASE V3O5_LT:I % 3 2 1 5 !
90: CONST V3O5_LT:I : V+3 : V+4 : O-2 : !

VO-15Yan-ver2.tdb: V3O5_LT, type code %, sha256 a7dd3bc52b4ee650…

89: PHASE V3O5_LT:I % 3 2 1 5 !
90: CONST V3O5_LT:I : V+3 : V+4 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V3O7 (O–V)

Id: phase:o-v:v3o7; status assigned
Structure: V3O7 · mC120 · C2/c (15); type st:v3o7-mc120; 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: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v3o7
tdb: tdb:VO-15Yan-ver1.tdb:V3O7, tdb:VO-15Yan-ver2.tdb:V3O7

TDB models of V3O7 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V3O7, type code %, sha256 e26d540d6bb84d67…

134: PHASE V3O7:I % 3 2 1 7 !
135: CONST V3O7:I : V+5 : V+4 : O-2 : !

VO-15Yan-ver2.tdb: V3O7, type code %, sha256 a7dd3bc52b4ee650…

134: PHASE V3O7:I % 3 2 1 7 !
135: CONST V3O7:I : V+5 : V+4 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V4O7 (O–V)

Id: phase:o-v:v4o7; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model
Candidate (tdb_comment): Ti4O7 · aP22 · P-1 — VO-15Yan-ver1.tdb: 'Prototype Ti4O7 (aP22, P-1)'
Candidate (tdb_comment): Ti4O7 · aP22 · P-1 — VO-15Yan-ver2.tdb: 'Prototype Ti4O7 (aP22, P-1)'
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v4o7
tdb: tdb:VO-15Yan-ver1.tdb:V4O7, tdb:VO-15Yan-ver2.tdb:V4O7

TDB models of V4O7 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V4O7, type code %, sha256 e26d540d6bb84d67…

99: PHASE V4O7:I % 3 2 2 7 !
100: CONST V4O7:I : V+3 : V+4 : O-2 : !

VO-15Yan-ver2.tdb: V4O7, type code %, sha256 a7dd3bc52b4ee650…

99: PHASE V4O7:I % 3 2 2 7 !
100: CONST V4O7:I : V+3 : V+4 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V52O64 (O–V)

Id: phase:o-v:v52o64; status assigned
Structure: V13O16 · tI116 · I4_1/amd (141); type st:v13o16-ti116; 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: O 0.5517, V 0.4483
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v52o64
tdb: tdb:VO-15Yan-ver1.tdb:V52O64, tdb:VO-15Yan-ver2.tdb:V52O64

TDB models of V52O64 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V52O64, type code %, sha256 e26d540d6bb84d67…

79: PHASE V52O64 % 2 52 64 !
80: CONST V52O64 : V : O : !

VO-15Yan-ver2.tdb: V52O64, type code %, sha256 a7dd3bc52b4ee650…

79: PHASE V52O64 % 2 52 64 !
80: CONST V52O64 : V : O : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V5O9 (O–V)

Id: phase:o-v:v5o9; status assigned
Structure: Ti5O9 · aP28 · P-1 (2); type st:ti5o9-ap28; 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: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v5o9
tdb: tdb:VO-15Yan-ver1.tdb:V5O9, tdb:VO-15Yan-ver2.tdb:V5O9

TDB models of V5O9 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V5O9, type code %, sha256 e26d540d6bb84d67…

104: PHASE V5O9:I % 3 2 3 9 !
105: CONST V5O9:I : V+3 : V+4 : O-2 : !

VO-15Yan-ver2.tdb: V5O9, type code %, sha256 a7dd3bc52b4ee650…

104: PHASE V5O9:I % 3 2 3 9 !
105: CONST V5O9:I : V+3 : V+4 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V6O11 (O–V)

Id: phase:o-v:v6o11; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model
Candidate (tdb_comment): Ti6O11 · aP34 · P-1 — VO-15Yan-ver1.tdb: 'Prototype Ti6O11 (aP34, P-1)'
Candidate (tdb_comment): Ti6O11 · aP34 · P-1 — VO-15Yan-ver2.tdb: 'Prototype Ti6O11 (aP34, P-1)'
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v6o11
tdb: tdb:VO-15Yan-ver1.tdb:V6O11, tdb:VO-15Yan-ver2.tdb:V6O11

TDB models of V6O11 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V6O11, type code %, sha256 e26d540d6bb84d67…

109: PHASE V6O11:I % 3 2 4 11 !
110: CONST V6O11:I : V+3 : V+4 : O-2 : !

VO-15Yan-ver2.tdb: V6O11, type code %, sha256 a7dd3bc52b4ee650…

109: PHASE V6O11:I % 3 2 4 11 !
110: CONST V6O11:I : V+3 : V+4 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V6O13 (O–V)

Id: phase:o-v:v6o13; status assigned
Structure: V6O13 · mC38 · C2/m (12); type st:v6o13-mc38; 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: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v6o13
tdb: tdb:VO-15Yan-ver1.tdb:V6O13, tdb:VO-15Yan-ver2.tdb:V6O13

TDB models of V6O13 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V6O13, type code %, sha256 e26d540d6bb84d67…

139: PHASE V6O13:I % 3 2 4 13 !
140: CONST V6O13:I : V+5 : V+4 : O-2 : !

VO-15Yan-ver2.tdb: V6O13, type code %, sha256 a7dd3bc52b4ee650…

139: PHASE V6O13:I % 3 2 4 13 !
140: CONST V6O13:I : V+5 : V+4 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V7O13 (O–V)

Id: phase:o-v:v7o13; status assigned
Structure: Ti7O13 · aP40 · P-1 (2); type st:ti7o13-ap40; 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: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v7o13
tdb: tdb:VO-15Yan-ver1.tdb:V7O13, tdb:VO-15Yan-ver2.tdb:V7O13

TDB models of V7O13 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V7O13, type code %, sha256 e26d540d6bb84d67…

114: PHASE V7O13:I % 3 2 5 13 !
115: CONST V7O13:I : V+3 : V+4 : O-2 : !

VO-15Yan-ver2.tdb: V7O13, type code %, sha256 a7dd3bc52b4ee650…

114: PHASE V7O13:I % 3 2 5 13 !
115: CONST V7O13:I : V+3 : V+4 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

V8O15 (O–V)

Id: phase:o-v:v8o15; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model
Candidate (tdb_comment): Ti8O15 · aP46 · P-1 — VO-15Yan-ver1.tdb: 'Prototype Ti8O15 (aP46, P-1)'
Candidate (tdb_comment): Ti8O15 · aP46 · P-1 — VO-15Yan-ver2.tdb: 'Prototype Ti8O15 (aP46, P-1)'
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:v8o15
tdb: tdb:VO-15Yan-ver1.tdb:V8O15, tdb:VO-15Yan-ver2.tdb:V8O15

TDB models of V8O15 (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: V8O15, type code %, sha256 e26d540d6bb84d67…

119: PHASE V8O15:I % 3 2 6 15 !
120: CONST V8O15:I : V+3 : V+4 : O-2 : !

VO-15Yan-ver2.tdb: V8O15, type code %, sha256 a7dd3bc52b4ee650…

119: PHASE V8O15:I % 3 2 6 15 !
120: CONST V8O15:I : V+3 : V+4 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

VO_BETA (O–V)

Id: phase:o-v:vo-beta; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model
Candidate (sgte_mmc2): CoO · tI4 · I4/mmm (139) — Hallstedt 2025 mmc2 row for VO_BETA: VO-beta
Candidate (tdb_comment): CoO · tI4 · I4/mmm — VO-15Yan-ver1.tdb: 'Prototype CoO (tI4, I4/mmm)'
Candidate (tdb_comment): CoO · tI4 · I4/mmm — VO-15Yan-ver2.tdb: 'Prototype CoO (tI4, I4/mmm)'
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:vo-beta
tdb: tdb:VO-15Yan-ver1.tdb:VO_BETA, tdb:VO-15Yan-ver2.tdb:VO_BETA

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

VO-15Yan-ver1.tdb: VO_BETA, type code %A, sha256 e26d540d6bb84d67…

64: PHASE VO_BETA %A 2 1 1 !
65: CONST VO_BETA : V : O VA : !

VO-15Yan-ver2.tdb: VO_BETA, type code %A, sha256 a7dd3bc52b4ee650…

64: PHASE VO_BETA %A 2 1 1 !
65: CONST VO_BETA : V : O VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
assessment that models this phase

VO2_LT (O–V)

Id: phase:o-v:vo2; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model
Candidate (sgte_mmc2): VO2 · mP12 · P2_1/c (14) — Hallstedt 2025 mmc2 row for VO2_LT: VO2-lt
Candidate (tdb_comment): — VO-15Yan-ver1.tdb: 'Prototype VO2 (mP12, P2_1/c'
Candidate (tdb_comment): — VO-15Yan-ver2.tdb: 'Prototype VO2 (mP12, P2_1/c'
Stability: no calculated diagram
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:o-v:vo2
tdb: tdb:VO-15Yan-ver1.tdb:VO2_LT, tdb:VO-15Yan-ver2.tdb:VO2_LT

TDB models of VO2_LT (2): PHASE and CONSTITUENT statements as written

VO-15Yan-ver1.tdb: VO2_LT, type code %, sha256 e26d540d6bb84d67…

124: PHASE VO2_LT:I % 2 1 2 !
125: CONST VO2_LT:I : V+4 : O-2 : !

VO-15Yan-ver2.tdb: VO2_LT, type code %, sha256 a7dd3bc52b4ee650…

124: PHASE VO2_LT:I % 2 1 2 !
125: CONST VO2_LT:I : V+4 : O-2 : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.08.003 Y. Yang, H. Mao, M. Selleby, Calphad, 51, 144-60(2015).
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}
}