Ni–Pr phases

12 phases (tier A 9, tier C 1, liquid 1, needs_review 1); 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–Pr system page · Markdown · field reference

Phases of the Ni–Pr system (12)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:ni-pr:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 1053.04–2499 K, x(Pr) 0.99503–1	3	2
DHCP phase:ni-pr:dhcp-a3	alpha-La · A3' · hP4 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1203 K, x(Pr) 0.99997–1	11	2
FCC_A1 phase:ni-pr:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1770.6 K, x(Pr) 0–3e-05	9	2
HCP_A3 phase:ni-pr:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 2 calculated diagram(s)	0	2
LIQUID phase:ni-pr:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 821.52–2500 K, x(Pr) 0–1	126	2
NI2PR_C15 phase:ni-pr:ni2pr-c15	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1193.9 K, x(Pr) 0.33333–0.33333	19	2
NI3PR phase:ni-pr:ni3pr	Ni3Pu · hR12 · R-3m (166)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–1302.41 K, x(Pr) 0.25–0.25	22	2
NI3PR7_D102 phase:ni-pr:ni3pr7-d102	Fe3Th7 · D10_2 · hP20 · P6_3mc (186)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–838.82 K, x(Pr) 0.7–0.7	25	2
NI5PR_D2D phase:ni-pr:ni5pr-d2d	CaCu5 · D2_d · hP6 · P6/mmm (191)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1658.31 K, x(Pr) 0.16667–0.16667	28	2
NI7PR2 phase:ni-pr:ni7pr2		needs_review	stable in 2 of 2 calculated diagram(s): 300–1435.38 K, x(Pr) 0.22222–0.22222	22	2
NIPR_B33 phase:ni-pr:nipr-b33	CrB · B33 · oC8 · Cmcm (63)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1038.99 K, x(Pr) 0.5–0.5	30	2
NIPR3_D011 phase:ni-pr:nipr3-d011	Fe3C · D0_11 · oP16 · Pnma (62)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–835 K, x(Pr) 0.75–0.75	30	2

BCC_A2 (Ni–Pr)

Id: phase:ni-pr: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 2 of 2 calculated diagram(s): 1053.04–2499 K, x(Pr) 0.99503–1
Literature: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ni-pr:bcc-a2
paper: paper:10.1016/j.jallcom.2004.11.039:bcc (Pr)
tdb: tdb:NiPr-05Hua.tdb:BCC_A2, tdb:NiPr-15Rah.tdb:BCC_A2

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

NiPr-05Hua.tdb: BCC_A2, type code %B, sha256 cc5105330c14229b…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : NI PR% : VA : !

NiPr-15Rah.tdb: BCC_A2, type code %B, sha256 a55bd7afc9e01e38…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase
doi:10.1007/bf02877506 Y. Y. Pan, P. Nash, The Ni-Pr (Nickel-Praesodymium) system, Bulletin of Alloy Phase Diagrams 10, 253-257 (1989).
cited as the source of values for this phase

DHCP (Ni–Pr)

Id: phase:ni-pr:dhcp-a3; status assigned
Structure: alpha-La · A3' · hP4 · P6_3/mmc (194); type st:a3-alpha-la-hp4; tier A: standard phase name; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 300–1203 K, x(Pr) 0.99997–1
Literature: 11 values (11 accepted) from 2 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:ni-pr:dhcp-a3, corpus:phase:ni-pr:dhcp
paper: paper:10.1016/j.jallcom.2004.11.039:dhcp (Pr), paper:10.1016/j.jallcom.2014.09.116:dhcp (Pr)
tdb: tdb:NiPr-05Hua.tdb:DHCP, tdb:NiPr-15Rah.tdb:DHCP

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

NiPr-05Hua.tdb: DHCP, type code %, sha256 cc5105330c14229b…

42: PHASE DHCP % 1 1 !
43: CONST DHCP : NI PR% : !

NiPr-15Rah.tdb: DHCP, type code %, sha256 a55bd7afc9e01e38…

43: PHASE DHCP % 1 1 !
44: CONST DHCP : NI PR% : !

Example references (7 of 7; assessments first):

doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02643852 C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-Ni system, Metall Trans A 17, 777-780 (1986).
cited as the source of values for this phase
doi:10.1007/bf02877506 Y. Y. Pan, P. Nash, The Ni-Pr (Nickel-Praesodymium) system, Bulletin of Alloy Phase Diagrams 10, 253-257 (1989).
cited as the source of values for this phase
doi:10.1007/s11669-005-0107-3 M. Huang, D. Wu, K. W. Dennis, J. W. Anderegg, R. W. McCallum, T. A. Lograsso, The Pr-rich portion of the Ni-Pr system, J Phs Eqil and Diff 26, 209-214 (2005).
cited as the source of values for this phase
doi:10.1016/s0925-8388(00)01382-7 G. Borzone, N. Parodi, R. Raggio, R. Ferro, Thermodynamic investigation of samarium–nickel alloys, Journal of Alloys and Compounds 317-318, 532-536 (2001).
cited as the source of values for this phase
doi:10.1515/ijmr-1947-380401 Vogel R, Iandelli A, Rolla L. Z Metallkd 1947;38:97–103.
cited as the source of values for this phase

FCC_A1 (Ni–Pr)

Id: phase:ni-pr: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 2 of 2 calculated diagram(s): 300–1770.6 K, x(Pr) 0–3e-05
Literature: 9 values (9 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ni-pr:fcc-a1
paper: paper:10.1016/j.jallcom.2004.11.039:fcc (Ni), paper:10.1016/j.jallcom.2014.09.116:fcc (Ni)
tdb: tdb:NiPr-05Hua.tdb:FCC_A1, tdb:NiPr-15Rah.tdb:FCC_A1

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

NiPr-05Hua.tdb: FCC_A1, type code %A, sha256 cc5105330c14229b…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : NI% PR : VA : !

NiPr-15Rah.tdb: FCC_A1, type code %A, sha256 a55bd7afc9e01e38…

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

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02643852 C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-Ni system, Metall Trans A 17, 777-780 (1986).
cited as the source of values for this phase
doi:10.1007/bf02877506 Y. Y. Pan, P. Nash, The Ni-Pr (Nickel-Praesodymium) system, Bulletin of Alloy Phase Diagrams 10, 253-257 (1989).
cited as the source of values for this phase
doi:10.1016/s0925-8388(00)01382-7 G. Borzone, N. Parodi, R. Raggio, R. Ferro, Thermodynamic investigation of samarium–nickel alloys, Journal of Alloys and Compounds 317-318, 532-536 (2001).
cited as the source of values for this phase
doi:10.1515/ijmr-1947-380401 Vogel R, Iandelli A, Rolla L. Z Metallkd 1947;38:97–103.
cited as the source of values for this phase

HCP_A3 (Ni–Pr)

Id: phase:ni-pr: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 2 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ni-pr:hcp-a3
tdb: tdb:NiPr-05Hua.tdb:HCP_A3, tdb:NiPr-15Rah.tdb:HCP_A3

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

NiPr-05Hua.tdb: HCP_A3, type code %A, sha256 cc5105330c14229b…

37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : NI PR : VA : !

NiPr-15Rah.tdb: HCP_A3, type code %A, sha256 a55bd7afc9e01e38…

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

Example references (2 of 2; assessments first):

doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase
doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase

LIQUID (Ni–Pr)

Id: phase:ni-pr:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 821.52–2500 K, x(Pr) 0–1
Literature: 126 values (121 accepted) from 3 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:ni-pr:liquid
paper: paper:10.1016/j.jallcom.2004.11.039:Liquid, paper:10.1016/j.jallcom.2014.09.116:Liquid, paper:10.1016/s0925-8388(98)00928-1:L
tdb: tdb:NiPr-05Hua.tdb:LIQUID, tdb:NiPr-15Rah.tdb:LIQUID

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

NiPr-05Hua.tdb: LIQUID, type code %, sha256 cc5105330c14229b…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : NI PR : !

NiPr-15Rah.tdb: LIQUID, type code %, sha256 a55bd7afc9e01e38…

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

Example references (8 of 8; assessments first):

doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02877506 Y. Y. Pan, P. Nash, The Ni-Pr (Nickel-Praesodymium) system, Bulletin of Alloy Phase Diagrams 10, 253-257 (1989).
cited as the source of values for this phase
doi:10.1007/bf02643852 C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-Ni system, Metall Trans A 17, 777-780 (1986).
cited as the source of values for this phase
doi:10.1016/s0925-8388(00)01382-7 G. Borzone, N. Parodi, R. Raggio, R. Ferro, Thermodynamic investigation of samarium–nickel alloys, Journal of Alloys and Compounds 317-318, 532-536 (2001).
cited as the source of values for this phase
doi:10.1007/s11669-005-0107-3 M. Huang, D. Wu, K. W. Dennis, J. W. Anderegg, R. W. McCallum, T. A. Lograsso, The Pr-rich portion of the Ni-Pr system, J Phs Eqil and Diff 26, 209-214 (2005).
cited as the source of values for this phase
doi:10.1515/ijmr-1947-380401 Vogel R, Iandelli A, Rolla L. Z Metallkd 1947;38:97–103.
cited as the source of values for this phase
doi:10.1016/s0925-8388(98)00928-1 Zhenmin Du, Donghui Wang, Weijing Zhang, Thermodynamic assessment of the Co–Pr, Er–Ni and Ni–Pr systems, Journal of Alloys and Compounds 284, 206-212 (1999).
reports values for this phase

NI2PR_C15 (Ni–Pr)

Id: phase:ni-pr:ni2pr-c15; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Stoichiometry: Ni 0.6667, Pr 0.3333
Stability: stable in 2 of 2 calculated diagram(s): 300–1193.9 K, x(Pr) 0.33333–0.33333
Literature: 19 values (19 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ni-pr:ni2pr-c15
paper: paper:10.1016/j.jallcom.2004.11.039:Ni2Pr, paper:10.1016/j.jallcom.2014.09.116:Ni2Pr
tdb: tdb:NiPr-05Hua.tdb:NI2PR_C15, tdb:NiPr-15Rah.tdb:NI2PR_C15

TDB models of NI2PR_C15 (2): PHASE and CONSTITUENT statements as written

NiPr-05Hua.tdb: NI2PR_C15, type code %, sha256 cc5105330c14229b…

62: PHASE NI2PR_C15 % 2 2 1 !
63: CONST NI2PR_C15 : NI : PR : !

NiPr-15Rah.tdb: NI2PR_C15, type code %, sha256 a55bd7afc9e01e38…

63: PHASE NI2PR_C15 % 2 2 1 !
64: CONST NI2PR_C15 : NI : PR : !

Example references (7 of 7; assessments first):

doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02643852 C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-Ni system, Metall Trans A 17, 777-780 (1986).
cited as the source of values for this phase
doi:10.1007/bf02877506 Y. Y. Pan, P. Nash, The Ni-Pr (Nickel-Praesodymium) system, Bulletin of Alloy Phase Diagrams 10, 253-257 (1989).
cited as the source of values for this phase
doi:10.1016/s0925-8388(00)01382-7 G. Borzone, N. Parodi, R. Raggio, R. Ferro, Thermodynamic investigation of samarium–nickel alloys, Journal of Alloys and Compounds 317-318, 532-536 (2001).
cited as the source of values for this phase
doi:10.1515/ijmr-1947-380401 Vogel R, Iandelli A, Rolla L. Z Metallkd 1947;38:97–103.
cited as the source of values for this phase
doi:10.1007/s11669-005-0107-3 M. Huang, D. Wu, K. W. Dennis, J. W. Anderegg, R. W. McCallum, T. A. Lograsso, The Pr-rich portion of the Ni-Pr system, J Phs Eqil and Diff 26, 209-214 (2005).
cited as the source of values for this phase

NI3PR (Ni–Pr)

Id: phase:ni-pr:ni3pr; status assigned
Structure: Ni3Pu · hR12 · R-3m (166); type st:ni3pu-hr12; 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 (dft_space_group_166_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Ni 0.7500, Pr 0.2500
Stability: stable in 2 of 2 calculated diagram(s): 300–1302.41 K, x(Pr) 0.25–0.25
Literature: 22 values (22 accepted) from 3 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:ni-pr:ni3pr
paper: paper:10.1016/j.jallcom.2004.11.039:Ni3Pr, paper:10.1016/j.jallcom.2014.09.116:Ni3Pr, paper:10.1016/s0925-8388(98)00928-1:Ni3Pr
tdb: tdb:NiPr-05Hua.tdb:NI3PR, tdb:NiPr-15Rah.tdb:NI3PR

TDB models of NI3PR (2): PHASE and CONSTITUENT statements as written

NiPr-05Hua.tdb: NI3PR, type code %, sha256 cc5105330c14229b…

57: PHASE NI3PR % 2 3 1 !
58: CONST NI3PR : NI : PR : !

NiPr-15Rah.tdb: NI3PR, type code %, sha256 a55bd7afc9e01e38…

58: PHASE NI3PR % 2 3 1 !
59: CONST NI3PR : NI : PR : !

Example references (7 of 7; assessments first):

doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02877506 Y. Y. Pan, P. Nash, The Ni-Pr (Nickel-Praesodymium) system, Bulletin of Alloy Phase Diagrams 10, 253-257 (1989).
cited as the source of values for this phase
doi:10.1016/s0925-8388(98)00928-1 Zhenmin Du, Donghui Wang, Weijing Zhang, Thermodynamic assessment of the Co–Pr, Er–Ni and Ni–Pr systems, Journal of Alloys and Compounds 284, 206-212 (1999).
reports values for this phase
doi:10.1007/bf02643852 C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-Ni system, Metall Trans A 17, 777-780 (1986).
cited as the source of values for this phase
doi:10.1016/s0925-8388(00)01382-7 G. Borzone, N. Parodi, R. Raggio, R. Ferro, Thermodynamic investigation of samarium–nickel alloys, Journal of Alloys and Compounds 317-318, 532-536 (2001).
cited as the source of values for this phase
doi:10.1515/ijmr-1947-380401 Vogel R, Iandelli A, Rolla L. Z Metallkd 1947;38:97–103.
cited as the source of values for this phase

NI3PR7_D102 (Ni–Pr)

Id: phase:ni-pr:ni3pr7-d102; status assigned
Structure: Fe3Th7 · D10_2 · hP20 · P6_3mc (186); type st:d10-2-fe3th7-hp20; tier A: standard phase name; confidence high
Stoichiometry: Ni 0.3000, Pr 0.7000
Stability: stable in 2 of 2 calculated diagram(s): 300–838.82 K, x(Pr) 0.7–0.7
Literature: 25 values (24 accepted) from 2 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:ni-pr:ni3pr7-d102
paper: paper:10.1016/j.jallcom.2004.11.039:Ni3Pr7, paper:10.1016/j.jallcom.2014.09.116:Ni3Pr7
tdb: tdb:NiPr-05Hua.tdb:NI3PR7_D102, tdb:NiPr-15Rah.tdb:NI3PR7_D102

TDB models of NI3PR7_D102 (2): PHASE and CONSTITUENT statements as written

NiPr-05Hua.tdb: NI3PR7_D102, type code %, sha256 cc5105330c14229b…

72: PHASE NI3PR7_D102 % 2 3 7 !
73: CONST NI3PR7_D102 : NI : PR : !

NiPr-15Rah.tdb: NI3PR7_D102, type code %, sha256 a55bd7afc9e01e38…

73: PHASE NI3PR7_D102 % 2 3 7 !
74: CONST NI3PR7_D102 : NI : PR : !

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02643852 C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-Ni system, Metall Trans A 17, 777-780 (1986).
cited as the source of values for this phase
doi:10.1007/s11669-005-0107-3 M. Huang, D. Wu, K. W. Dennis, J. W. Anderegg, R. W. McCallum, T. A. Lograsso, The Pr-rich portion of the Ni-Pr system, J Phs Eqil and Diff 26, 209-214 (2005).
cited as the source of values for this phase
doi:10.1007/bf02877506 Y. Y. Pan, P. Nash, The Ni-Pr (Nickel-Praesodymium) system, Bulletin of Alloy Phase Diagrams 10, 253-257 (1989).
cited as the source of values for this phase
doi:10.1016/s0925-8388(00)01382-7 G. Borzone, N. Parodi, R. Raggio, R. Ferro, Thermodynamic investigation of samarium–nickel alloys, Journal of Alloys and Compounds 317-318, 532-536 (2001).
cited as the source of values for this phase

NI5PR_D2D (Ni–Pr)

Id: phase:ni-pr:ni5pr-d2d; status assigned
Structure: CaCu5 · D2_d · hP6 · P6/mmm (191); type st:d2-d-cacu5-hp6; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaadne and oqmd-17787, space group 191
Stoichiometry: Ni 0.8333, Pr 0.1667
Stability: stable in 2 of 2 calculated diagram(s): 300–1658.31 K, x(Pr) 0.16667–0.16667
Literature: 28 values (27 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:ni-pr:ni5pr-d2d
mp: mp:mp-aaaaadne
oqmd: oqmd:oqmd-17787
paper: paper:10.1016/j.jallcom.2004.11.039:Ni5Pr, paper:10.1016/j.jallcom.2014.09.116:Ni5Pr
tdb: tdb:NiPr-05Hua.tdb:NI5PR_D2D, tdb:NiPr-15Rah.tdb:NI5PR_D2D

TDB models of NI5PR_D2D (2): PHASE and CONSTITUENT statements as written

NiPr-05Hua.tdb: NI5PR_D2D, type code %, sha256 cc5105330c14229b…

47: PHASE NI5PR_D2D % 2 5 1 !
48: CONST NI5PR_D2D : NI : PR : !

NiPr-15Rah.tdb: NI5PR_D2D, type code %, sha256 a55bd7afc9e01e38…

48: PHASE NI5PR_D2D % 2 5 1 !
49: CONST NI5PR_D2D : NI : PR : !

Example references (6 of 6; assessments first):

doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02643852 C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-Ni system, Metall Trans A 17, 777-780 (1986).
cited as the source of values for this phase
doi:10.1007/bf02877506 Y. Y. Pan, P. Nash, The Ni-Pr (Nickel-Praesodymium) system, Bulletin of Alloy Phase Diagrams 10, 253-257 (1989).
cited as the source of values for this phase
doi:10.1016/s0925-8388(00)01382-7 G. Borzone, N. Parodi, R. Raggio, R. Ferro, Thermodynamic investigation of samarium–nickel alloys, Journal of Alloys and Compounds 317-318, 532-536 (2001).
cited as the source of values for this phase
doi:10.1515/ijmr-1947-380401 Vogel R, Iandelli A, Rolla L. Z Metallkd 1947;38:97–103.
cited as the source of values for this phase

NI7PR2 (Ni–Pr)

Id: phase:ni-pr:ni7pr2; status needs_review
No structure assigned. Why: no_structure_token; sgte_mmc2_row_disagrees_with_dft; sgte_mmc2_rows_disagree
Candidate (dft_mp): P6_3/mmc (194) — on-hull MP Pr2Ni7 at x(PR)=0.2222
Candidate (dft_oqmd): P63/mmc (194) — on-hull OQMD Ni7 Pr2 at x(PR)=0.2222
Candidate (literature_printed): Ce2Ni7 · hP36 — printed with a label mapped to this phase
Candidate (sgte_mmc2): Ce2Ni7 · hP36 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for NI7PR2: Ni7Pr2 (high T), see also Co7Gd2
Candidate (sgte_mmc2): Co7Gd2 · hR18 · R-3m (166) — Hallstedt 2025 mmc2 row for NI7PR2: Ni7Pr2 (low T), see also Ce2Ni7
Candidate (tdb_comment): Ce2Ni7 · hP36 · P6_3/mmc, ht — NiPr-05Hua.tdb: 'Prototype Ce2Ni7 (hP36, P6_3/mmc, ht) and Co7Gd2 (hR18, R-3m, lt)'
Candidate (tdb_comment): Ce2Ni7 · hP36 · P6_3/mmc, ht — NiPr-15Rah.tdb: 'Prototype Ce2Ni7 (hP36, P6_3/mmc, ht) and Co7Gd2 (hR18, R-3m, lt)'
Stoichiometry: Ni 0.7778, Pr 0.2222
Stability: stable in 2 of 2 calculated diagram(s): 300–1435.38 K, x(Pr) 0.22222–0.22222
Literature: 22 values (22 accepted) from 3 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:ni-pr:ni7pr2
paper: paper:10.1016/j.jallcom.2004.11.039:Ni7Pr2, paper:10.1016/j.jallcom.2014.09.116:Ni7Pr2, paper:10.1016/s0925-8388(98)00928-1:Ni7Pr2
tdb: tdb:NiPr-05Hua.tdb:NI7PR2, tdb:NiPr-15Rah.tdb:NI7PR2

TDB models of NI7PR2 (2): PHASE and CONSTITUENT statements as written

NiPr-05Hua.tdb: NI7PR2, type code %, sha256 cc5105330c14229b…

52: PHASE NI7PR2 % 2 7 2 !
53: CONST NI7PR2 : NI : PR : !

NiPr-15Rah.tdb: NI7PR2, type code %, sha256 a55bd7afc9e01e38…

53: PHASE NI7PR2 % 2 7 2 !
54: CONST NI7PR2 : NI : PR : !

Example references (7 of 7; assessments first):

doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02877506 Y. Y. Pan, P. Nash, The Ni-Pr (Nickel-Praesodymium) system, Bulletin of Alloy Phase Diagrams 10, 253-257 (1989).
cited as the source of values for this phase
doi:10.1016/s0925-8388(98)00928-1 Zhenmin Du, Donghui Wang, Weijing Zhang, Thermodynamic assessment of the Co–Pr, Er–Ni and Ni–Pr systems, Journal of Alloys and Compounds 284, 206-212 (1999).
reports values for this phase
doi:10.1007/bf02643852 C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-Ni system, Metall Trans A 17, 777-780 (1986).
cited as the source of values for this phase
doi:10.1016/s0925-8388(00)01382-7 G. Borzone, N. Parodi, R. Raggio, R. Ferro, Thermodynamic investigation of samarium–nickel alloys, Journal of Alloys and Compounds 317-318, 532-536 (2001).
cited as the source of values for this phase
doi:10.1515/ijmr-1947-380401 Vogel R, Iandelli A, Rolla L. Z Metallkd 1947;38:97–103.
cited as the source of values for this phase

NIPR_B33 (Ni–Pr)

Id: phase:ni-pr:nipr-b33; status assigned
Structure: CrB · B33 · oC8 · Cmcm (63); type st:b33-crb-oc8; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaarlv and oqmd-30838, space group 63
Stoichiometry: Ni 0.5000, Pr 0.5000
Stability: stable in 2 of 2 calculated diagram(s): 300–1038.99 K, x(Pr) 0.5–0.5
Literature: 30 values (28 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:ni-pr:nipr-b33
mp: mp:mp-aaaaarlv
oqmd: oqmd:oqmd-30838
paper: paper:10.1016/j.jallcom.2004.11.039:NiPr, paper:10.1016/j.jallcom.2014.09.116:NiPr
tdb: tdb:NiPr-05Hua.tdb:NIPR_B33, tdb:NiPr-15Rah.tdb:NIPR_B33

TDB models of NIPR_B33 (2): PHASE and CONSTITUENT statements as written

NiPr-05Hua.tdb: NIPR_B33, type code %, sha256 cc5105330c14229b…

67: PHASE NIPR_B33 % 2 1 1 !
68: CONST NIPR_B33 : NI : PR : !

NiPr-15Rah.tdb: NIPR_B33, type code %, sha256 a55bd7afc9e01e38…

68: PHASE NIPR_B33 % 2 1 1 !
69: CONST NIPR_B33 : NI : PR : !

Example references (7 of 7; assessments first):

doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02643852 C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-Ni system, Metall Trans A 17, 777-780 (1986).
cited as the source of values for this phase
doi:10.1007/s11669-005-0107-3 M. Huang, D. Wu, K. W. Dennis, J. W. Anderegg, R. W. McCallum, T. A. Lograsso, The Pr-rich portion of the Ni-Pr system, J Phs Eqil and Diff 26, 209-214 (2005).
cited as the source of values for this phase
doi:10.1016/s0925-8388(00)01382-7 G. Borzone, N. Parodi, R. Raggio, R. Ferro, Thermodynamic investigation of samarium–nickel alloys, Journal of Alloys and Compounds 317-318, 532-536 (2001).
cited as the source of values for this phase
doi:10.1007/bf02877506 Y. Y. Pan, P. Nash, The Ni-Pr (Nickel-Praesodymium) system, Bulletin of Alloy Phase Diagrams 10, 253-257 (1989).
cited as the source of values for this phase
doi:10.1515/ijmr-1947-380401 Vogel R, Iandelli A, Rolla L. Z Metallkd 1947;38:97–103.
cited as the source of values for this phase

NIPR3_D011 (Ni–Pr)

Id: phase:ni-pr:nipr3-d011; status assigned
Structure: Fe3C · D0_11 · oP16 · Pnma (62); type st:d0-11-fe3c-op16; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaackyhe and oqmd-30835, space group 62
Stoichiometry: Ni 0.2500, Pr 0.7500
Stability: stable in 2 of 2 calculated diagram(s): 300–835 K, x(Pr) 0.75–0.75
Literature: 30 values (29 accepted) from 2 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:ni-pr:nipr3-d011
mp: mp:mp-aaackyhe
oqmd: oqmd:oqmd-30835
paper: paper:10.1016/j.jallcom.2004.11.039:NiPr3, paper:10.1016/j.jallcom.2014.09.116:NiPr3
tdb: tdb:NiPr-05Hua.tdb:NIPR3_D011, tdb:NiPr-15Rah.tdb:NIPR3_D011

TDB models of NIPR3_D011 (2): PHASE and CONSTITUENT statements as written

NiPr-05Hua.tdb: NIPR3_D011, type code %, sha256 cc5105330c14229b…

77: PHASE NIPR3_D011 % 2 1 3 !
78: CONST NIPR3_D011 : NI : PR : !

NiPr-15Rah.tdb: NIPR3_D011, type code %, sha256 a55bd7afc9e01e38…

78: PHASE NIPR3_D011 % 2 1 3 !
79: CONST NIPR3_D011 : NI : PR : !

Example references (7 of 7; assessments first):

doi:10.1016/j.jallcom.2014.09.116 Z. Rahou, K. Mahdouk, D. Moustain, S. Otmani, S. Kardellass, A. Iddaoudi et al., Thermodynamic reassessment of Ni-Pr binary system, Journal of Alloys and Compounds 620, 204-209 (2015).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2004.11.039 Mianliang Huang, Thomas A. Lograsso, Experimental investigation and thermodynamic modeling of the Ni–Pr system, Journal of Alloys and Compounds 395, 75-79 (2005).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02643852 C. Colinet, A. Pasturel, K. H. J. Buschow, Study of the enthalpies of formation in the Gd-Ni system, Metall Trans A 17, 777-780 (1986).
cited as the source of values for this phase
doi:10.1007/s11669-005-0107-3 M. Huang, D. Wu, K. W. Dennis, J. W. Anderegg, R. W. McCallum, T. A. Lograsso, The Pr-rich portion of the Ni-Pr system, J Phs Eqil and Diff 26, 209-214 (2005).
cited as the source of values for this phase
doi:10.1007/bf02877506 Y. Y. Pan, P. Nash, The Ni-Pr (Nickel-Praesodymium) system, Bulletin of Alloy Phase Diagrams 10, 253-257 (1989).
cited as the source of values for this phase
doi:10.1016/s0925-8388(00)01382-7 G. Borzone, N. Parodi, R. Raggio, R. Ferro, Thermodynamic investigation of samarium–nickel alloys, Journal of Alloys and Compounds 317-318, 532-536 (2001).
cited as the source of values for this phase
doi:10.1515/ijmr-1947-380401 Vogel R, Iandelli A, Rolla L. Z Metallkd 1947;38:97–103.
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}
}