B–Pr phases
10 phases (tier A 6, tier C 1, liquid 1, needs_review 2); 8 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 · B–Pr system page · Markdown · field reference
| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---|---|
| ALPHA_RHOMBO_B phase:b-pr:b-alpha-rhombo | needs_review | stable in 2 of 2 calculated diagram(s): 300–1388 K, x(B) 1–1 | 0 | 2 | |
| BETA_RHOMBO_B phase:b-pr:b-beta-rhombo | needs_review | stable in 2 of 2 calculated diagram(s): 1388–2349 K, x(B) 1–1 | 6 | 2 | |
| BCC_A2 phase:b-pr:bcc-a2 | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 1067.99–3999.03 K, x(B) 0–0 | 14 | 2 |
| DHCP phase:b-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(B) 0–0 | 3 | 2 |
| FCC_A1 phase:b-pr:fcc-a1 | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 2 |
| HCP_A3 phase:b-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:b-pr:liquid | liquid | liquid | stable in 2 of 2 calculated diagram(s): 1182.65–4000 K, x(B) 0–1 | 36 | 2 |
| PR2B5 phase:b-pr:pr2b5 | Pr2B5 · mC56 · C2/c (15) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–2343.25 K, x(B) 0.71429–0.71429 | 13 | 2 |
| PRB4_D1E phase:b-pr:prb4-d1e | UB4 · D1_e · tP20 · P4/mbm (127) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2623.17 K, x(B) 0.8–0.8 | 10 | 2 |
| PRB6_D21 phase:b-pr:prb6-d21 | CaB6 · D2_1 · cP7 · Pm-3m (221) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2883.17 K, x(B) 0.85714–0.91464 | 18 | 2 |
ALPHA_RHOMBO_B (B–Pr)
- Id:
phase:b-pr:b-alpha-rhombo; statusneeds_review - No structure assigned. Why: name_has_descriptive_tokens:RHOMBO; no_structure_token
- Candidate (sgte_mmc2): alpha-B · hR12 · R-3m (166) — Hallstedt 2025 mmc2 row for ALPHA_RHOMBO_B: Si_nB
- Candidate (tdb_comment): alpha-B · hR12 · R-3m — PrB-13Wan.tdb: 'Prototype alpha-B (hR12, R-3m)'
- Candidate (tdb_comment): alpha-B · hR12 · R-3m — PrB-20Che.tdb: 'Prototype alpha-B (hR12, R-3m)'
- Stoichiometry: B 1.0000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1388 K, x(B) 1–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:b-pr:b-alpha-rhombo
tdb: tdb:PrB-13Wan.tdb:ALPHA_RHOMBO_B, tdb:PrB-20Che.tdb:ALPHA_RHOMBO_B
TDB models of ALPHA_RHOMBO_B (2): PHASE and CONSTITUENT statements as written
PrB-13Wan.tdb: ALPHA_RHOMBO_B, type code %, sha256 a95dbd566cd88a91…
46: PHASE ALPHA_RHOMBO_B % 1 1 ! 47: CONST ALPHA_RHOMBO_B : B : !
PrB-20Che.tdb: ALPHA_RHOMBO_B, type code %, sha256 1085e8b115f28b9a…
50: PHASE ALPHA_RHOMBO_B % 1 1 ! 51: CONST ALPHA_RHOMBO_B : B : !
Example references (2 of 2; assessments first):
- doi:10.1016/j.calphad.2013.03.001 C.P. Wang, Y. Shi, D. Wang, Y. Lu, D.L. Zhao, X.J. Liu, Thermodynamic assessment of the B–Ce and B–Pr systems, Calphad 41, 150-155 (2013).
assessment that models this phase - doi:10.1016/j.jmmm.2019.165983 Taili Chen, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental investigation and thermodynamic description of the Pr–Fe–B system, Journal of Magnetism and Magnetic Materials 497, 165983 (2020).
assessment that models this phase
BETA_RHOMBO_B (B–Pr)
- Id:
phase:b-pr:b-beta-rhombo; statusneeds_review - No structure assigned. Why: name_has_descriptive_tokens:RHOMBO; no_structure_token
- Candidate (sgte_mmc2): beta-B · hR105 · R-3m (166) — Hallstedt 2025 mmc2 row for BETA_RHOMBO_B: beta-B
- Candidate (tdb_comment): beta-B · hR105 · R-3m — PrB-13Wan.tdb: 'Prototype beta-B (hR105, R-3m)'
- Candidate (tdb_comment): beta-B · hR105 · R-3m — PrB-20Che.tdb: 'Prototype beta-B (hR105, R-3m)'
- Stoichiometry: B 1.0000
- Stability: stable in 2 of 2 calculated diagram(s): 1388–2349 K, x(B) 1–1
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: phase registry entry
Names (4): corpus: corpus:phase:b-pr:b-beta-rhombo
paper: paper:10.1016/j.calphad.2013.03.001:(βB)
tdb: tdb:PrB-13Wan.tdb:BETA_RHOMBO_B, tdb:PrB-20Che.tdb:BETA_RHOMBO_B
TDB models of BETA_RHOMBO_B (2): PHASE and CONSTITUENT statements as written
PrB-13Wan.tdb: BETA_RHOMBO_B, type code %, sha256 a95dbd566cd88a91…
51: PHASE BETA_RHOMBO_B % 1 1 ! 52: CONST BETA_RHOMBO_B : B : !
PrB-20Che.tdb: BETA_RHOMBO_B, type code %, sha256 1085e8b115f28b9a…
55: PHASE BETA_RHOMBO_B % 1 1 ! 56: CONST BETA_RHOMBO_B : B : !
Example references (2 of 2; assessments first):
- doi:10.1016/j.calphad.2013.03.001 C.P. Wang, Y. Shi, D. Wang, Y. Lu, D.L. Zhao, X.J. Liu, Thermodynamic assessment of the B–Ce and B–Pr systems, Calphad 41, 150-155 (2013).
assessment that models this phase; reports values for this phase - doi:10.1016/j.jmmm.2019.165983 Taili Chen, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental investigation and thermodynamic description of the Pr–Fe–B system, Journal of Magnetism and Magnetic Materials 497, 165983 (2020).
assessment that models this phase
BCC_A2 (B–Pr)
- Id:
phase:b-pr:bcc-a2; statusassigned - 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): 1067.99–3999.03 K, x(B) 0–0
- Literature: 14 values (14 accepted) from 2 papers
- Interactive: phase registry entry
Names (5): corpus: corpus:phase:b-pr:bcc-a2
paper: paper:10.1016/j.calphad.2013.03.001:(βPr), paper:10.1016/j.jmmm.2019.165983:bcc(Pr)
tdb: tdb:PrB-13Wan.tdb:BCC_A2, tdb:PrB-20Che.tdb:BCC_A2
TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written
PrB-13Wan.tdb: BCC_A2, type code %B, sha256 a95dbd566cd88a91…
31: PHASE BCC_A2 %B 2 1 3 ! 32: CONST BCC_A2 : B PR% : VA : !
PrB-20Che.tdb: BCC_A2, type code %B, sha256 1085e8b115f28b9a…
35: PHASE BCC_A2 %B 2 1 3 ! 36: CONST BCC_A2 : B PR% : VA : !
Example references (2 of 2; assessments first):
- doi:10.1016/j.calphad.2013.03.001 C.P. Wang, Y. Shi, D. Wang, Y. Lu, D.L. Zhao, X.J. Liu, Thermodynamic assessment of the B–Ce and B–Pr systems, Calphad 41, 150-155 (2013).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase - doi:10.1016/j.jmmm.2019.165983 Taili Chen, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental investigation and thermodynamic description of the Pr–Fe–B system, Journal of Magnetism and Magnetic Materials 497, 165983 (2020).
assessment that models this phase; reports values for this phase
DHCP (B–Pr)
- Id:
phase:b-pr:dhcp-a3; statusassigned - Structure: alpha-La · A3' · hP4 · P6_3/mmc (194); type
st:a3-alpha-la-hp4; tier A: standard phase name; confidence high - Stoichiometry: Pr 1.0000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1203 K, x(B) 0–0
- Literature: 3 values (3 accepted) from 1 papers
- Interactive: phase registry entry
Names (4): corpus: corpus:phase:b-pr:dhcp-a3
paper: paper:10.1016/j.calphad.2013.03.001:(αPr)
tdb: tdb:PrB-13Wan.tdb:DHCP, tdb:PrB-20Che.tdb:DHCP
TDB models of DHCP (2): PHASE and CONSTITUENT statements as written
PrB-13Wan.tdb: DHCP, type code %, sha256 a95dbd566cd88a91…
41: PHASE DHCP % 1 1 ! 42: CONST DHCP : PR : !
PrB-20Che.tdb: DHCP, type code %, sha256 1085e8b115f28b9a…
45: PHASE DHCP % 1 1 ! 46: CONST DHCP : PR : !
Example references (2 of 2; assessments first):
- doi:10.1016/j.calphad.2013.03.001 C.P. Wang, Y. Shi, D. Wang, Y. Lu, D.L. Zhao, X.J. Liu, Thermodynamic assessment of the B–Ce and B–Pr systems, Calphad 41, 150-155 (2013).
assessment that models this phase; reports values for this phase - doi:10.1016/j.jmmm.2019.165983 Taili Chen, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental investigation and thermodynamic description of the Pr–Fe–B system, Journal of Magnetism and Magnetic Materials 497, 165983 (2020).
assessment that models this phase
FCC_A1 (B–Pr)
- Id:
phase:b-pr:fcc-a1; statusassigned - Structure: Cu · A1 · cF4 · Fm-3m (225); type
st:a1-cu-cf4; tier A: standard phase name; confidence high - Stoichiometry: B 1.0000
- 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:b-pr:fcc-a1
tdb: tdb:PrB-13Wan.tdb:FCC_A1, tdb:PrB-20Che.tdb:FCC_A1
TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written
PrB-13Wan.tdb: FCC_A1, type code %A, sha256 a95dbd566cd88a91…
26: PHASE FCC_A1 %A 2 1 1 ! 27: CONST FCC_A1 : B : VA : !
PrB-20Che.tdb: FCC_A1, type code %A, sha256 1085e8b115f28b9a…
30: PHASE FCC_A1 %A 2 1 1 ! 31: CONST FCC_A1 : B : VA : !
Example references (2 of 2; assessments first):
- doi:10.1016/j.calphad.2013.03.001 C.P. Wang, Y. Shi, D. Wang, Y. Lu, D.L. Zhao, X.J. Liu, Thermodynamic assessment of the B–Ce and B–Pr systems, Calphad 41, 150-155 (2013).
assessment that models this phase - doi:10.1016/j.jmmm.2019.165983 Taili Chen, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental investigation and thermodynamic description of the Pr–Fe–B system, Journal of Magnetism and Magnetic Materials 497, 165983 (2020).
assessment that models this phase
HCP_A3 (B–Pr)
- Id:
phase:b-pr:hcp-a3; statusassigned - Structure: Mg · A3 · hP2 · P6_3/mmc (194); type
st:a3-mg-hp2; tier A: standard phase name; confidence high - Stoichiometry: B 1.0000
- 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:b-pr:hcp-a3
tdb: tdb:PrB-13Wan.tdb:HCP_A3, tdb:PrB-20Che.tdb:HCP_A3
TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written
PrB-13Wan.tdb: HCP_A3, type code %A, sha256 a95dbd566cd88a91…
36: PHASE HCP_A3 %A 2 1 0.5 ! 37: CONST HCP_A3 : B : VA : !
PrB-20Che.tdb: HCP_A3, type code %A, sha256 1085e8b115f28b9a…
40: PHASE HCP_A3 %A 2 1 0.5 ! 41: CONST HCP_A3 : B : VA : !
Example references (2 of 2; assessments first):
- doi:10.1016/j.calphad.2013.03.001 C.P. Wang, Y. Shi, D. Wang, Y. Lu, D.L. Zhao, X.J. Liu, Thermodynamic assessment of the B–Ce and B–Pr systems, Calphad 41, 150-155 (2013).
assessment that models this phase - doi:10.1016/j.jmmm.2019.165983 Taili Chen, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental investigation and thermodynamic description of the Pr–Fe–B system, Journal of Magnetism and Magnetic Materials 497, 165983 (2020).
assessment that models this phase
LIQUID (B–Pr)
- Id:
phase:b-pr:liquid; statusassigned - Structure: liquid; type
st:liquid; liquid; confidence high - Stability: stable in 2 of 2 calculated diagram(s): 1182.65–4000 K, x(B) 0–1
- Literature: 36 values (36 accepted) from 2 papers
- Interactive: phase registry entry
Names (5): corpus: corpus:phase:b-pr:liquid
paper: paper:10.1016/j.calphad.2013.03.001:L, paper:10.1016/j.jmmm.2019.165983:liq.
tdb: tdb:PrB-13Wan.tdb:LIQUID, tdb:PrB-20Che.tdb:LIQUID
TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written
PrB-13Wan.tdb: LIQUID, type code %, sha256 a95dbd566cd88a91…
21: PHASE LIQUID:L % 1 1 ! 22: CONST LIQUID:L : B PR : !
PrB-20Che.tdb: LIQUID, type code %, sha256 1085e8b115f28b9a…
25: PHASE LIQUID:L % 1 1 ! 26: CONST LIQUID:L : B PR : !
Example references (2 of 2; assessments first):
- doi:10.1016/j.calphad.2013.03.001 C.P. Wang, Y. Shi, D. Wang, Y. Lu, D.L. Zhao, X.J. Liu, Thermodynamic assessment of the B–Ce and B–Pr systems, Calphad 41, 150-155 (2013).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase - doi:10.1016/j.jmmm.2019.165983 Taili Chen, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental investigation and thermodynamic description of the Pr–Fe–B system, Journal of Magnetism and Magnetic Materials 497, 165983 (2020).
assessment that models this phase; reports values for this phase
PR2B5 (B–Pr)
- Id:
phase:b-pr:pr2b5; statusassigned - Structure: Pr2B5 · mC56 · C2/c (15); type
st:pr2b5-mc56; 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_15_matches_3_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: B 0.7143, Pr 0.2857
- Stability: stable in 2 of 2 calculated diagram(s): 300–2343.25 K, x(B) 0.71429–0.71429
- Literature: 13 values (13 accepted) from 2 papers
- Interactive: phase registry entry
Names (5): corpus: corpus:phase:b-pr:pr2b5
paper: paper:10.1016/j.calphad.2013.03.001:B5Pr2, paper:10.1016/j.jmmm.2019.165983:Pr2B5
tdb: tdb:PrB-13Wan.tdb:PR2B5, tdb:PrB-20Che.tdb:PR2B5
TDB models of PR2B5 (2): PHASE and CONSTITUENT statements as written
PrB-13Wan.tdb: PR2B5, type code %, sha256 a95dbd566cd88a91…
56: PHASE PR2B5 % 2 2 5 ! 57: CONST PR2B5 : PR : B : !
PrB-20Che.tdb: PR2B5, type code %, sha256 1085e8b115f28b9a…
60: PHASE PR2B5 % 2 2 5 ! 61: CONST PR2B5 : PR : B : !
Example references (2 of 2; assessments first):
- doi:10.1016/j.calphad.2013.03.001 C.P. Wang, Y. Shi, D. Wang, Y. Lu, D.L. Zhao, X.J. Liu, Thermodynamic assessment of the B–Ce and B–Pr systems, Calphad 41, 150-155 (2013).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase - doi:10.1016/j.jmmm.2019.165983 Taili Chen, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental investigation and thermodynamic description of the Pr–Fe–B system, Journal of Magnetism and Magnetic Materials 497, 165983 (2020).
assessment that models this phase; reports values for this phase
PRB4_D1E (B–Pr)
- Id:
phase:b-pr:prb4-d1e; statusassigned - Structure: UB4 · D1_e · tP20 · P4/mbm (127); type
st:d1-e-ub4-tp20; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaaaaspl and oqmd-18748, space group 127
- Stoichiometry: B 0.8000, Pr 0.2000
- Stability: stable in 2 of 2 calculated diagram(s): 300–2623.17 K, x(B) 0.8–0.8
- Literature: 10 values (10 accepted) from 2 papers
- Interactive: phase registry entry
Names (7): corpus: corpus:phase:b-pr:prb4-d1e
mp: mp:mp-aaaaaspl
oqmd: oqmd:oqmd-18748
paper: paper:10.1016/j.calphad.2013.03.001:B4Pr, paper:10.1016/j.jmmm.2019.165983:PrB4
tdb: tdb:PrB-13Wan.tdb:PRB4_D1E, tdb:PrB-20Che.tdb:PRB4_D1E
TDB models of PRB4_D1E (2): PHASE and CONSTITUENT statements as written
PrB-13Wan.tdb: PRB4_D1E, type code %, sha256 a95dbd566cd88a91…
61: PHASE PRB4_D1E % 2 1 4 ! 62: CONST PRB4_D1E : PR : B : !
PrB-20Che.tdb: PRB4_D1E, type code %, sha256 1085e8b115f28b9a…
65: PHASE PRB4_D1E % 2 1 4 ! 66: CONST PRB4_D1E : PR : B : !
Example references (2 of 2; assessments first):
- doi:10.1016/j.calphad.2013.03.001 C.P. Wang, Y. Shi, D. Wang, Y. Lu, D.L. Zhao, X.J. Liu, Thermodynamic assessment of the B–Ce and B–Pr systems, Calphad 41, 150-155 (2013).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase - doi:10.1016/j.jmmm.2019.165983 Taili Chen, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental investigation and thermodynamic description of the Pr–Fe–B system, Journal of Magnetism and Magnetic Materials 497, 165983 (2020).
assessment that models this phase; reports values for this phase
PRB6_D21 (B–Pr)
- Id:
phase:b-pr:prb6-d21; statusassigned - Structure: CaB6 · D2_1 · cP7 · Pm-3m (221); type
st:d2-1-cab6-cp7; tier A: standard phase name; confidence high - Stability: stable in 2 of 2 calculated diagram(s): 300–2883.17 K, x(B) 0.85714–0.91464
- Literature: 18 values (18 accepted) from 2 papers
- Interactive: phase registry entry
Names (5): corpus: corpus:phase:b-pr:prb6-d21
paper: paper:10.1016/j.calphad.2013.03.001:B6Pr, paper:10.1016/j.jmmm.2019.165983:PrB6
tdb: tdb:PrB-13Wan.tdb:PRB6_D21, tdb:PrB-20Che.tdb:PRB6_D21
TDB models of PRB6_D21 (2): PHASE and CONSTITUENT statements as written
PrB-13Wan.tdb: PRB6_D21, type code %, sha256 a95dbd566cd88a91…
66: PHASE PRB6_D21 % 2 1 6 ! 67: CONST PRB6_D21 : PR% B : B : !
PrB-20Che.tdb: PRB6_D21, type code %, sha256 1085e8b115f28b9a…
70: PHASE PRB6_D21 % 2 1 6 ! 71: CONST PRB6_D21 : PR% B : B : !
Example references (2 of 2; assessments first):
- doi:10.1016/j.calphad.2013.03.001 C.P. Wang, Y. Shi, D. Wang, Y. Lu, D.L. Zhao, X.J. Liu, Thermodynamic assessment of the B–Ce and B–Pr systems, Calphad 41, 150-155 (2013).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase - doi:10.1016/j.jmmm.2019.165983 Taili Chen, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental investigation and thermodynamic description of the Pr–Fe–B system, Journal of Magnetism and Magnetic Materials 497, 165983 (2020).
assessment that models this phase; reports values for this phase