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

Phases of the B–Pr system (10)
PhaseStructureBasisStability (calculated)Literature valuesTDB models
ALPHA_RHOMBO_B
phase:b-pr:b-alpha-rhombo
needs_reviewstable in 2 of 2 calculated diagram(s): 300–1388 K, x(B) 1–102
BETA_RHOMBO_B
phase:b-pr:b-beta-rhombo
needs_reviewstable in 2 of 2 calculated diagram(s): 1388–2349 K, x(B) 1–162
BCC_A2
phase:b-pr:bcc-a2
W · A2 · cI2 · Im-3m (229)tier A: standard phase namestable in 2 of 2 calculated diagram(s): 1067.99–3999.03 K, x(B) 0–0142
DHCP
phase:b-pr:dhcp-a3
alpha-La · A3' · hP4 · P6_3/mmc (194)tier A: standard phase namestable in 2 of 2 calculated diagram(s): 300–1203 K, x(B) 0–032
FCC_A1
phase:b-pr:fcc-a1
Cu · A1 · cF4 · Fm-3m (225)tier A: standard phase namenot stable in 2 calculated diagram(s)02
HCP_A3
phase:b-pr:hcp-a3
Mg · A3 · hP2 · P6_3/mmc (194)tier A: standard phase namenot stable in 2 calculated diagram(s)02
LIQUID
phase:b-pr:liquid
liquidliquidstable in 2 of 2 calculated diagram(s): 1182.65–4000 K, x(B) 0–1362
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) 0.71429–0.71429132
PRB4_D1E
phase:b-pr:prb4-d1e
UB4 · D1_e · tP20 · P4/mbm (127)tier A: standard phase namestable in 2 of 2 calculated diagram(s): 300–2623.17 K, x(B) 0.8–0.8102
PRB6_D21
phase:b-pr:prb6-d21
CaB6 · D2_1 · cP7 · Pm-3m (221)tier A: standard phase namestable in 2 of 2 calculated diagram(s): 300–2883.17 K, x(B) 0.85714–0.91464182

ALPHA_RHOMBO_B (B–Pr)

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):

BETA_RHOMBO_B (B–Pr)

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):

BCC_A2 (B–Pr)

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):

DHCP (B–Pr)

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):

FCC_A1 (B–Pr)

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):

HCP_A3 (B–Pr)

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):

LIQUID (B–Pr)

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):

PR2B5 (B–Pr)

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):

PRB4_D1E (B–Pr)

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):

PRB6_D21 (B–Pr)

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):