Ni–P phases

14 phases (tier A 3, tier C 2, liquid 1, needs_review 8); 11 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–P system page · Markdown · field reference

Phases of the Ni–P system (14)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:ni-p:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 3 calculated diagram(s)	0	3
M2P_C22 phase:ni-p:c22-m2p	Fe2P · C22 · hP9 · P-62m (189)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 3 of 3 calculated diagram(s): 300–1386.87 K, x(P) 0.33333–0.33333	4	3
M3P_D0E phase:ni-p:d0e-m3p	Ni3P · D0_e · tI32 · I-4 (82)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 3 of 3 calculated diagram(s): 300–1247.32 K, x(P) 0.25–0.25	4	3
FCC_A1 phase:ni-p:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1771.21 K, x(P) 0–0.00346	2	3
HCP_A3 phase:ni-p: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:ni-p:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 300–2500 K, x(P) 0–1	12	3
NI12P5 phase:ni-p:ni12p5		needs_review	stable in 1 of 1 calculated diagram(s): 1014.77–1344.54 K, x(P) 0.29412–0.29412	0	1
NI12P5_H phase:ni-p:ni12p5-h		needs_review	stable in 2 of 2 calculated diagram(s): 1273.85–1423.3 K, x(P) 0.294–0.29412	6	2
NI12P5_L phase:ni-p:ni12p5-l		needs_review	stable in 2 of 2 calculated diagram(s): 300–1273.89 K, x(P) 0.294–0.29412	2	2
NI5P2_H phase:ni-p:ni5p2-h		needs_review	stable in 3 of 3 calculated diagram(s): 1298.7–1451.85 K, x(P) 0.28571–0.286	6	3
NI5P2_L phase:ni-p:ni5p2-l		needs_review	stable in 3 of 3 calculated diagram(s): 300–1301.28 K, x(P) 0.28571–0.286	4	3
NI6P5 phase:ni-p:ni6p5		needs_review	stable in 1 of 1 calculated diagram(s): 300–1169.35 K, x(P) 0.45455–0.45455	0	1
RED_P phase:ni-p:p-red		needs_review	stable in 3 of 3 calculated diagram(s): 300–855 K, x(P) 1–1	0	3
WHITE_P phase:ni-p:p-white		needs_review	not stable in 3 calculated diagram(s)	0	3

BCC_A2 (Ni–P)

Id: phase:ni-p: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:ni-p:bcc-a2
tdb: tdb:NiP-15Mie.tdb:BCC_A2, tdb:NiP-89NPL.tdb:BCC_A2, tdb:NiP-99Shi.tdb:BCC_A2

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

NiP-15Mie.tdb: BCC_A2, type code %B, sha256 a366279c70ac4520…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : NI P : VA : !

NiP-89NPL.tdb: BCC_A2, type code %B, sha256 4b112c50bbb75441…

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

NiP-99Shi.tdb: BCC_A2, type code %B, sha256 1e721e0ac49254b2…

38: PHASE BCC_A2 %B 2 1 3 !
39: CONST BCC_A2 : NI P : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase
doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
assessment that models this phase

M2P_C22 (Ni–P)

Id: phase:ni-p:c22-m2p; status assigned
Structure: Fe2P · C22 · hP9 · P-62m (189); type st:c22-fe2p-hp9; 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:M2P); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ni 0.6667, P 0.3333
Stability: stable in 3 of 3 calculated diagram(s): 300–1386.87 K, x(P) 0.33333–0.33333
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:ni-p:c22-m2p, corpus:phase:ni-p:m2p-c22
paper: paper:10.1016/s0925-8388(98)00826-3:Ni2P
tdb: tdb:NiP-15Mie.tdb:M2P_C22, tdb:NiP-89NPL.tdb:M2P_C22, tdb:NiP-99Shi.tdb:M2P_C22

TDB models of M2P_C22 (3): PHASE and CONSTITUENT statements as written

NiP-15Mie.tdb: M2P_C22, type code %, sha256 a366279c70ac4520…

72: PHASE M2P_C22 % 2 2 1 !
73: CONST M2P_C22 : NI : P : !

NiP-89NPL.tdb: M2P_C22, type code %, sha256 4b112c50bbb75441…

59: PHASE M2P_C22 % 2 2 1 !
60: CONST M2P_C22 : NI : P : !

NiP-99Shi.tdb: M2P_C22, type code %, sha256 1e721e0ac49254b2…

63: PHASE M2P_C22 % 2 2 1 !
64: CONST M2P_C22 : NI : P : !

Example references (2 of 2; assessments first):

doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase

M3P_D0E (Ni–P)

Id: phase:ni-p:d0e-m3p; status assigned
Structure: Ni3P · D0_e · tI32 · I-4 (82); type st:d0-e-ni3p-ti32; 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: DFT agrees: on-hull mp-aaaaadki and oqmd-5265, space group 82
Caveat: not certain from the name or DFT alone (unrecognised_name_tokens:M3P); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ni 0.7500, P 0.2500
Stability: stable in 3 of 3 calculated diagram(s): 300–1247.32 K, x(P) 0.25–0.25
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:ni-p:d0e-m3p, corpus:phase:ni-p:m3p-d0e
mp: mp:mp-aaaaadki
oqmd: oqmd:oqmd-5265
paper: paper:10.1016/s0925-8388(98)00826-3:Ni3P
tdb: tdb:NiP-15Mie.tdb:M3P_D0E, tdb:NiP-89NPL.tdb:M3P_D0E, tdb:NiP-99Shi.tdb:M3P_D0E

TDB models of M3P_D0E (3): PHASE and CONSTITUENT statements as written

NiP-15Mie.tdb: M3P_D0E, type code %, sha256 a366279c70ac4520…

51: PHASE M3P_D0E % 2 3 1 !
52: CONST M3P_D0E : NI : P : !

NiP-89NPL.tdb: M3P_D0E, type code %, sha256 4b112c50bbb75441…

54: PHASE M3P_D0E % 2 3 1 !
55: CONST M3P_D0E : NI : P : !

NiP-99Shi.tdb: M3P_D0E, type code %, sha256 1e721e0ac49254b2…

58: PHASE M3P_D0E % 2 3 1 !
59: CONST M3P_D0E : NI : P : !

Example references (2 of 2; assessments first):

doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase

FCC_A1 (Ni–P)

Id: phase:ni-p: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): 300–1771.21 K, x(P) 0–0.00346
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ni-p:fcc-a1
paper: paper:10.1016/s0925-8388(98)00826-3:f.c.c.
tdb: tdb:NiP-15Mie.tdb:FCC_A1, tdb:NiP-89NPL.tdb:FCC_A1, tdb:NiP-99Shi.tdb:FCC_A1

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

NiP-15Mie.tdb: FCC_A1, type code %A, sha256 a366279c70ac4520…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : NI% P : VA : !

NiP-89NPL.tdb: FCC_A1, type code %A, sha256 4b112c50bbb75441…

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

NiP-99Shi.tdb: FCC_A1, type code %A, sha256 1e721e0ac49254b2…

33: PHASE FCC_A1 %A 2 1 1 !
34: CONST FCC_A1 : NI% P : VA : !

Example references (2 of 2; assessments first):

doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase

HCP_A3 (Ni–P)

Id: phase:ni-p: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:ni-p:hcp-a3
tdb: tdb:NiP-15Mie.tdb:HCP_A3, tdb:NiP-89NPL.tdb:HCP_A3, tdb:NiP-99Shi.tdb:HCP_A3

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

NiP-15Mie.tdb: HCP_A3, type code %A, sha256 a366279c70ac4520…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : NI P : VA : !

NiP-89NPL.tdb: HCP_A3, type code %A, sha256 4b112c50bbb75441…

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

NiP-99Shi.tdb: HCP_A3, type code %A, sha256 1e721e0ac49254b2…

43: PHASE HCP_A3 %A 2 1 0.5 !
44: CONST HCP_A3 : NI P : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase
doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
assessment that models this phase

LIQUID (Ni–P)

Id: phase:ni-p:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 300–2500 K, x(P) 0–1
Literature: 12 values (12 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:ni-p:liquid
paper: paper:10.1016/s0925-8388(98)00826-3:Liquid, paper:10.1016/s0925-8388(98)00826-3:liquid
tdb: tdb:NiP-15Mie.tdb:LIQUID, tdb:NiP-89NPL.tdb:LIQUID, tdb:NiP-99Shi.tdb:LIQUID

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

NiP-15Mie.tdb: LIQUID, type code %, sha256 a366279c70ac4520…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : NI P : !

NiP-89NPL.tdb: LIQUID, type code %, sha256 4b112c50bbb75441…

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

NiP-99Shi.tdb: LIQUID, type code %, sha256 1e721e0ac49254b2…

28: PHASE LIQUID:L % 1 1 !
29: CONST LIQUID:L : NI P : !

Example references (2 of 2; assessments first):

doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase

NI12P5 (Ni–P)

Id: phase:ni-p:ni12p5; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition
Candidate (dft_mp): I4/m (87) — on-hull MP Ni12P5 at x(P)=0.2941
Candidate (dft_oqmd): I4/m (87) — on-hull OQMD Ni12 P5 at x(P)=0.2941
Candidate (tdb_comment): ? · tI34 · I4/m — NiP-89NPL.tdb: 'Prototype ? (tI34, I4/m)'
Stoichiometry: Ni 0.7059, P 0.2941
Stability: stable in 1 of 1 calculated diagram(s): 1014.77–1344.54 K, x(P) 0.29412–0.29412
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ni-p:ni12p5
tdb: tdb:NiP-89NPL.tdb:NI12P5

TDB models of NI12P5 (1): PHASE and CONSTITUENT statements as written

NiP-89NPL.tdb: NI12P5, type code %, sha256 4b112c50bbb75441…

72: PHASE NI12P5 % 2 12 5 !
73: CONST NI12P5 : NI : P : !

NI12P5_H (Ni–P)

Id: phase:ni-p:ni12p5-h; status needs_review
No structure assigned. Why: models_disagree_on_composition; name_has_descriptive_tokens:H; no_structure_token; sgte_mmc2_row_incomplete
Candidate (dft_mp): I4/m (87) — on-hull MP Ni12P5 at x(P)=0.2941
Candidate (dft_oqmd): I4/m (87) — on-hull OQMD Ni12 P5 at x(P)=0.2941
Candidate (literature_printed): (h-Ni12P5) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (h-Ni12P5) — Hallstedt 2025 mmc2 row for NI12P5_H: Ni12P5
Stability: stable in 2 of 2 calculated diagram(s): 1273.85–1423.3 K, x(P) 0.294–0.29412
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ni-p:ni12p5-h
paper: paper:10.1016/s0925-8388(98)00826-3:δNi12P5
tdb: tdb:NiP-15Mie.tdb:NI12P5_H, tdb:NiP-99Shi.tdb:NI12P5_H

TDB models of NI12P5_H (2): PHASE and CONSTITUENT statements as written

NiP-15Mie.tdb: NI12P5_H, type code %, sha256 a366279c70ac4520…

67: PHASE NI12P5_H % 2 12 5 !
68: CONST NI12P5_H : NI : P : !

NiP-99Shi.tdb: NI12P5_H, type code %, sha256 1e721e0ac49254b2…

79: PHASE NI12P5_H % 2 0.706 0.294 !
80: CONST NI12P5_H : NI : P : !

Example references (2 of 2; assessments first):

doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase

NI12P5_L (Ni–P)

Id: phase:ni-p:ni12p5-l; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:models_disagree_on_composition; models_disagree_on_composition; name_has_descriptive_tokens:L; no_structure_token
Candidate (dft_mp): I4/m (87) — on-hull MP Ni12P5 at x(P)=0.2941
Candidate (dft_oqmd): I4/m (87) — on-hull OQMD Ni12 P5 at x(P)=0.2941
Candidate (literature_printed): Ni12P5 · tI34 — printed with a label mapped to this phase
Candidate (sgte_mmc2): Ni12P5 · tI34 · I4/m (87) — Hallstedt 2025 mmc2 row for NI12P5_L: Ni12P5
Candidate (tdb_comment): ? · tI34 · I4/m — NiP-15Mie.tdb: 'Prototype ? (tI34, I4/m)'
Candidate (tdb_comment): ? · tI34 · I4/m — NiP-99Shi.tdb: 'Prototype ? (tI34, I4/m)'
Stability: stable in 2 of 2 calculated diagram(s): 300–1273.89 K, x(P) 0.294–0.29412
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ni-p:ni12p5-l
paper: paper:10.1016/s0925-8388(98)00826-3:γNi12P5
tdb: tdb:NiP-15Mie.tdb:NI12P5_L, tdb:NiP-99Shi.tdb:NI12P5_L

TDB models of NI12P5_L (2): PHASE and CONSTITUENT statements as written

NiP-15Mie.tdb: NI12P5_L, type code %, sha256 a366279c70ac4520…

64: PHASE NI12P5_L % 2 12 5 !
65: CONST NI12P5_L : NI : P : !

NiP-99Shi.tdb: NI12P5_L, type code %, sha256 1e721e0ac49254b2…

76: PHASE NI12P5_L % 2 0.706 0.294 !
77: CONST NI12P5_L : NI : P : !

Example references (2 of 2; assessments first):

doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase

NI5P2_H (Ni–P)

Id: phase:ni-p:ni5p2-h; status needs_review
No structure assigned. Why: models_disagree_on_composition; name_has_descriptive_tokens:H; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (h-Ni5P2) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (h-Ni5P2) — Hallstedt 2025 mmc2 row for NI5P2_H: Ni5P2
Stability: stable in 3 of 3 calculated diagram(s): 1298.7–1451.85 K, x(P) 0.28571–0.286
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ni-p:ni5p2-h
paper: paper:10.1016/s0925-8388(98)00826-3:βNi5P2
tdb: tdb:NiP-15Mie.tdb:NI5P2_H, tdb:NiP-89NPL.tdb:NI5P2_H, tdb:NiP-99Shi.tdb:NI5P2_H

TDB models of NI5P2_H (3): PHASE and CONSTITUENT statements as written

NiP-15Mie.tdb: NI5P2_H, type code %, sha256 a366279c70ac4520…

59: PHASE NI5P2_H % 2 5 2 !
60: CONST NI5P2_H : NI : P : !

NiP-89NPL.tdb: NI5P2_H, type code %, sha256 4b112c50bbb75441…

67: PHASE NI5P2_H % 2 5 2 !
68: CONST NI5P2_H : NI : P : !

NiP-99Shi.tdb: NI5P2_H, type code %, sha256 1e721e0ac49254b2…

71: PHASE NI5P2_H % 2 0.714 0.286 !
72: CONST NI5P2_H : NI : P : !

Example references (2 of 2; assessments first):

doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase

NI5P2_L (Ni–P)

Id: phase:ni-p:ni5p2-l; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:models_disagree_on_composition; models_disagree_on_composition; name_has_descriptive_tokens:L; no_structure_token
Candidate (literature_printed): (l-Ni5P2) · hP168 — printed with a label mapped to this phase
Candidate (sgte_mmc2): (l-Ni5P2) · hP168 · P-3 (147) — Hallstedt 2025 mmc2 row for NI5P2_L: Ni5P2
Candidate (tdb_comment): ? · hP168 · P-3 — NiP-15Mie.tdb: 'Prototype ? (hP168, P-3)'
Candidate (tdb_comment): ? · hP168 · P-3 — NiP-89NPL.tdb: 'Prototype ? (hP168, P-3)'
Candidate (tdb_comment): ? · hP168 · P-3 — NiP-99Shi.tdb: 'Prototype ? (hP168, P-3)'
Stability: stable in 3 of 3 calculated diagram(s): 300–1301.28 K, x(P) 0.28571–0.286
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ni-p:ni5p2-l
paper: paper:10.1016/s0925-8388(98)00826-3:αNi5P2
tdb: tdb:NiP-15Mie.tdb:NI5P2_L, tdb:NiP-89NPL.tdb:NI5P2_L, tdb:NiP-99Shi.tdb:NI5P2_L

TDB models of NI5P2_L (3): PHASE and CONSTITUENT statements as written

NiP-15Mie.tdb: NI5P2_L, type code %, sha256 a366279c70ac4520…

56: PHASE NI5P2_L % 2 5 2 !
57: CONST NI5P2_L : NI : P : !

NiP-89NPL.tdb: NI5P2_L, type code %, sha256 4b112c50bbb75441…

64: PHASE NI5P2_L % 2 5 2 !
65: CONST NI5P2_L : NI : P : !

NiP-99Shi.tdb: NI5P2_L, type code %, sha256 1e721e0ac49254b2…

68: PHASE NI5P2_L % 2 0.714 0.286 !
69: CONST NI5P2_L : NI : P : !

Example references (2 of 2; assessments first):

doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase

NI6P5 (Ni–P)

Id: phase:ni-p:ni6p5; status needs_review
No structure assigned. Why: assessment_declared_compound_differs_from_model_composition; no_on_hull_entry_in_both; no_structure_token
Candidate (sgte_mmc2): Ni5P4 · hP36 · P6_3mc (186) — Hallstedt 2025 mmc2 row for NI6P5: Ni5P4
Candidate (tdb_comment): Ni5P4 · hP36 · P6_3mc — NiP-89NPL.tdb: 'Prototype Ni5P4 (hP36, P6_3mc)'
Stoichiometry: Ni 0.5455, P 0.4545
Stability: stable in 1 of 1 calculated diagram(s): 300–1169.35 K, x(P) 0.45455–0.45455
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:ni-p:ni6p5
tdb: tdb:NiP-89NPL.tdb:NI6P5

TDB models of NI6P5 (1): PHASE and CONSTITUENT statements as written

NiP-89NPL.tdb: NI6P5, type code %, sha256 4b112c50bbb75441…

77: PHASE NI6P5 % 2 6 5 !
78: CONST NI6P5 : NI : P : !

RED_P (Ni–P)

Id: phase:ni-p:p-red; status needs_review
No structure assigned. Why: name_has_descriptive_tokens:RED; no_structure_token
Candidate (sgte_mmc2): (Red P) — Hallstedt 2025 mmc2 row for RED_P: Red P
Stoichiometry: P 1.0000
Stability: stable in 3 of 3 calculated diagram(s): 300–855 K, x(P) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ni-p:p-red
tdb: tdb:NiP-15Mie.tdb:RED_P, tdb:NiP-89NPL.tdb:RED_P, tdb:NiP-99Shi.tdb:RED_P

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

NiP-15Mie.tdb: RED_P, type code %, sha256 a366279c70ac4520…

46: PHASE RED_P % 1 1 !
47: CONST RED_P : P : !

NiP-89NPL.tdb: RED_P, type code %, sha256 4b112c50bbb75441…

49: PHASE RED_P % 1 1 !
50: CONST RED_P : P : !

NiP-99Shi.tdb: RED_P, type code %, sha256 1e721e0ac49254b2…

53: PHASE RED_P % 1 1 !
54: CONST RED_P : P : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase
doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
assessment that models this phase

WHITE_P (Ni–P)

Id: phase:ni-p:p-white; status needs_review
No structure assigned. Why: name_has_descriptive_tokens:WHITE; no_structure_token
Candidate (sgte_mmc2): (White P) — Hallstedt 2025 mmc2 row for WHITE_P: White P
Stoichiometry: P 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:ni-p:p-white
tdb: tdb:NiP-15Mie.tdb:WHITE_P, tdb:NiP-89NPL.tdb:WHITE_P, tdb:NiP-99Shi.tdb:WHITE_P

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

NiP-15Mie.tdb: WHITE_P, type code %, sha256 a366279c70ac4520…

41: PHASE WHITE_P % 1 1 !
42: CONST WHITE_P : P : !

NiP-89NPL.tdb: WHITE_P, type code %, sha256 4b112c50bbb75441…

44: PHASE WHITE_P % 1 1 !
45: CONST WHITE_P : P : !

NiP-99Shi.tdb: WHITE_P, type code %, sha256 1e721e0ac49254b2…

48: PHASE WHITE_P % 1 1 !
49: CONST WHITE_P : P : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-014-0358-y Jyrki Miettinen, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 6: Fe-Ni-P, J. Phase Equilib. Diffus. 36, 78-87 (2015).
assessment that models this phase
doi:10.1016/S0925-8388(98)00826-3 J.-H. Shim, H.-J. Chung, D.N. Lee, J. Alloys Compd., 282, 175-81(1999).
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}
}