B–Hf phases

9 phases (tier A 4, tier C 3, liquid 1, needs_review 1); 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–Hf system page · Markdown · field reference

Phases of the B–Hf system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BETA_RHOMBO_B phase:b-hf:b-beta-rhombo		needs_review	stable in 4 of 4 calculated diagram(s): 300–2490.94 K, x(B) 1–1	7	4
MB_B27 phase:b-hf:b27-mb	FeB · B27 · oP8 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 3 of 3 calculated diagram(s): 300–2380.45 K, x(B) 0.5–0.5	16	3
BCC_A2 phase:b-hf:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 2016.03–3999.88 K, x(B) 0–0.04944	15	4
MB2_C32 phase:b-hf:c32-mb2	AlB2 · C32 · hP3 · P6/mmm (191)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 3 of 3 calculated diagram(s): 300–3651.93 K, x(B) 0.66667–0.67697	27	3
FCC_A1 phase:b-hf:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 4 calculated diagram(s)	0	4
HCP_A3 phase:b-hf:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–2070 K, x(B) 0–0.02014	6	4
HFB_B27 phase:b-hf:hfb-b27	FeB · B27 · oP8 · Pnma (62)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–2373.37 K, x(B) 0.49967–0.5	6	1
HFB2_C32 phase:b-hf:hfb2-c32	AlB2 · C32 · hP3 · P6/mmm (191)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–3650.95 K, x(B) 0.66369–0.70713	6	1
LIQUID phase:b-hf:liquid	liquid	liquid	stable in 4 of 4 calculated diagram(s): 2148.11–4000 K, x(B) 0–1	29	4

BETA_RHOMBO_B (B–Hf)

Id: phase:b-hf:b-beta-rhombo; status needs_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 — HfB-10Kau.tdb: 'Prototype beta-B (hR105, R-3m)'
Candidate (tdb_comment): beta-B · hR105 · R-3m — HfB-11Cac.tdb: 'Prototype beta-B (hR105, R-3m)'
Candidate (tdb_comment): beta-B · hR105 · R-3m — HfB-21Pan.tdb: 'Prototype beta-B (hR105, R-3m)'
Candidate (tdb_comment): beta-B · hR105 · R-3m — HfB-97Bit-LB.tdb: 'Prototype beta-B (hR105, R-3m)'
Stoichiometry: B 1.0000
Stability: stable in 4 of 4 calculated diagram(s): 300–2490.94 K, x(B) 1–1
Literature: 7 values (7 accepted) from 4 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:b-hf:b-beta-rhombo, corpus:phase:b-hf:beta-rhombo-b
paper: paper:10.1007/bf02646757:B, paper:10.1007/s11669-021-00928-3:(βB), paper:10.1016/j.calphad.2011.10.003:B, paper:sha256-85fd53a1a176b694:β-rhombo-B
tdb: tdb:HfB-10Kau.tdb:BETA_RHOMBO_B, tdb:HfB-11Cac.tdb:BETA_RHOMBO_B, tdb:HfB-21Pan.tdb:BETA_RHOMBO_B, tdb:HfB-97Bit-LB.tdb:BETA_RHOMBO_B

TDB models of BETA_RHOMBO_B (4): PHASE and CONSTITUENT statements as written

HfB-10Kau.tdb: BETA_RHOMBO_B, type code %, sha256 c2047bb2395431ba…

52: PHASE BETA_RHOMBO_B % 2 93 12 !
53: CONST BETA_RHOMBO_B : B : B : !

HfB-11Cac.tdb: BETA_RHOMBO_B, type code %, sha256 5df78501ac600909…

44: PHASE BETA_RHOMBO_B % 2 93 12 !
45: CONST BETA_RHOMBO_B : B : B : !

HfB-21Pan.tdb: BETA_RHOMBO_B, type code %, sha256 af0cbca19fdb3a31…

51: PHASE BETA_RHOMBO_B % 2 93 12 !
52: CONST BETA_RHOMBO_B : B : B : !

HfB-97Bit-LB.tdb: BETA_RHOMBO_B, type code %, sha256 be69f82e1247105b…

46: PHASE BETA_RHOMBO_B % 2 93 12 !
47: CONST BETA_RHOMBO_B : B : B : !

Example references (4 of 4; assessments first):

doi:10.1007/BF02646757 H. Bittermann, P. Rogl, J. Phase Equilib., 18, 24-47(1997).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11669-021-00928-3 Yafei Pan, Lei Huang, Jiuxing Zhang, Yong Du, Fenghua Luo, Shuyan Zhang, Thermodynamic Assessment of the Ternary B-Hf-Zr System with Refined B-Hf Description, J. Phase Equilib. Diffus. 42, 864-878 (2021).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.003 G. Cacciamani, P. Riani, F. Valenza, Equilibrium between MB2 (M=Ti,Zr,Hf) UHTC and Ni: A thermodynamic database for the B–Hf–Ni–Ti–Zr system, Calphad 35, 601-619 (2011).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2009.10.005 L. Kaufman, G. Cacciamani, M.L. Muolo, F. Valenza, A. Passerone, Calphad, 34, 2-5(2010).
assessment that models this phase

MB_B27 (B–Hf)

Id: phase:b-hf:b27-mb; status assigned
Structure: FeB · B27 · oP8 · Pnma (62); type st:b27-feb-op8; 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 (name_has_descriptive_tokens:MB, no_structure_token, structure_token_is_also_a_formula); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: B 0.5000, Hf 0.5000
Stability: stable in 3 of 3 calculated diagram(s): 300–2380.45 K, x(B) 0.5–0.5
Literature: 16 values (16 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:b-hf:b27-mb, corpus:phase:b-hf:mb-b27
paper: paper:10.1007/bf02646757:HfB, paper:10.1016/j.calphad.2011.10.003:HfB, paper:sha256-85fd53a1a176b694:BHf
tdb: tdb:HfB-10Kau.tdb:MB_B27, tdb:HfB-11Cac.tdb:MB_B27, tdb:HfB-97Bit-LB.tdb:MB_B27

TDB models of MB_B27 (3): PHASE and CONSTITUENT statements as written

HfB-10Kau.tdb: MB_B27, type code %, sha256 c2047bb2395431ba…

57: PHASE MB_B27 % 2 1 1 !
58: CONST MB_B27 : HF : B : !

HfB-11Cac.tdb: MB_B27, type code %, sha256 5df78501ac600909…

49: PHASE MB_B27 % 2 1 1 !
50: CONST MB_B27 : HF : B : !

HfB-97Bit-LB.tdb: MB_B27, type code %, sha256 be69f82e1247105b…

51: PHASE MB_B27 % 2 1 1 !
52: CONST MB_B27 : HF : B : !

Example references (3 of 3; assessments first):

doi:10.1007/BF02646757 H. Bittermann, P. Rogl, J. Phase Equilib., 18, 24-47(1997).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.003 G. Cacciamani, P. Riani, F. Valenza, Equilibrium between MB2 (M=Ti,Zr,Hf) UHTC and Ni: A thermodynamic database for the B–Hf–Ni–Ti–Zr system, Calphad 35, 601-619 (2011).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2009.10.005 L. Kaufman, G. Cacciamani, M.L. Muolo, F. Valenza, A. Passerone, Calphad, 34, 2-5(2010).
assessment that models this phase

BCC_A2 (B–Hf)

Id: phase:b-hf: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 4 of 4 calculated diagram(s): 2016.03–3999.88 K, x(B) 0–0.04944
Literature: 15 values (15 accepted) from 4 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:b-hf:bcc-a2
paper: paper:10.1007/bf02646757:βHf, paper:10.1007/s11669-021-00928-3:(βHf), paper:10.1016/j.calphad.2011.10.003:bcc-Hf, paper:sha256-85fd53a1a176b694:bcc-A2
tdb: tdb:HfB-10Kau.tdb:BCC_A2, tdb:HfB-11Cac.tdb:BCC_A2, tdb:HfB-21Pan.tdb:BCC_A2, tdb:HfB-97Bit-LB.tdb:BCC_A2

TDB models of BCC_A2 (4): PHASE and CONSTITUENT statements as written

HfB-10Kau.tdb: BCC_A2, type code %B, sha256 c2047bb2395431ba…

42: PHASE BCC_A2 %B 2 1 3 !
43: CONST BCC_A2 : B HF% : VA : !

HfB-11Cac.tdb: BCC_A2, type code %B, sha256 5df78501ac600909…

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

HfB-21Pan.tdb: BCC_A2, type code %B, sha256 af0cbca19fdb3a31…

41: PHASE BCC_A2 %B 2 1 3 !
42: CONST BCC_A2 : HF% : B VA% : !

HfB-97Bit-LB.tdb: BCC_A2, type code %B, sha256 be69f82e1247105b…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : HF% : B VA% : !

Example references (5 of 5; assessments first):

doi:10.1007/BF02646757 H. Bittermann, P. Rogl, J. Phase Equilib., 18, 24-47(1997).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11669-021-00928-3 Yafei Pan, Lei Huang, Jiuxing Zhang, Yong Du, Fenghua Luo, Shuyan Zhang, Thermodynamic Assessment of the Ternary B-Hf-Zr System with Refined B-Hf Description, J. Phase Equilib. Diffus. 42, 864-878 (2021).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.003 G. Cacciamani, P. Riani, F. Valenza, Equilibrium between MB2 (M=Ti,Zr,Hf) UHTC and Ni: A thermodynamic database for the B–Hf–Ni–Ti–Zr system, Calphad 35, 601-619 (2011).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2009.10.005 L. Kaufman, G. Cacciamani, M.L. Muolo, F. Valenza, A. Passerone, Calphad, 34, 2-5(2010).
assessment that models this phase
doi:10.1016/0364-5916(91)90030-n A.T. Dinsdale, SGTE data for pure elements, Calphad 15, 317-425 (1991).
cited as the source of values for this phase

MB2_C32 (B–Hf)

Id: phase:b-hf:c32-mb2; status assigned
Structure: AlB2 · C32 · hP3 · P6/mmm (191); type st:c32-alb2-hp3; 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:MB2); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: stable in 3 of 3 calculated diagram(s): 300–3651.93 K, x(B) 0.66667–0.67697
Literature: 27 values (27 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:b-hf:c32-mb2, corpus:phase:b-hf:mb2-c32
paper: paper:10.1007/bf02646757:HfB2, paper:10.1016/j.calphad.2011.10.003:HfB2, paper:sha256-85fd53a1a176b694:B2Hf
tdb: tdb:HfB-10Kau.tdb:MB2_C32, tdb:HfB-11Cac.tdb:MB2_C32, tdb:HfB-97Bit-LB.tdb:MB2_C32

TDB models of MB2_C32 (3): PHASE and CONSTITUENT statements as written

HfB-10Kau.tdb: MB2_C32, type code %, sha256 c2047bb2395431ba…

62: PHASE MB2_C32 % 2 1 2 !
63: CONST MB2_C32 : HF : B : !

HfB-11Cac.tdb: MB2_C32, type code %, sha256 5df78501ac600909…

54: PHASE MB2_C32 % 2 1 2 !
55: CONST MB2_C32 : HF% VA : B : !

HfB-97Bit-LB.tdb: MB2_C32, type code %, sha256 be69f82e1247105b…

56: PHASE MB2_C32 % 2 1 2 !
57: CONST MB2_C32 : HF : B : !

Example references (4 of 4; assessments first):

doi:10.1007/BF02646757 H. Bittermann, P. Rogl, J. Phase Equilib., 18, 24-47(1997).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.003 G. Cacciamani, P. Riani, F. Valenza, Equilibrium between MB2 (M=Ti,Zr,Hf) UHTC and Ni: A thermodynamic database for the B–Hf–Ni–Ti–Zr system, Calphad 35, 601-619 (2011).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2009.10.005 L. Kaufman, G. Cacciamani, M.L. Muolo, F. Valenza, A. Passerone, Calphad, 34, 2-5(2010).
assessment that models this phase
doi:10.1016/0021-9614(77)90048-9 Edgar F Westrum, Goerge Feick, Heat capacities of HfB2.035 and HfC0.968 from 5 to 350 K, The Journal of Chemical Thermodynamics 9, 293-299 (1977).
cited as the source of values for this phase

FCC_A1 (B–Hf)

Id: phase:b-hf:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: not stable in 4 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:b-hf:fcc-a1
tdb: tdb:HfB-10Kau.tdb:FCC_A1, tdb:HfB-11Cac.tdb:FCC_A1, tdb:HfB-21Pan.tdb:FCC_A1, tdb:HfB-97Bit-LB.tdb:FCC_A1

TDB models of FCC_A1 (4): PHASE and CONSTITUENT statements as written

HfB-10Kau.tdb: FCC_A1, type code %A, sha256 c2047bb2395431ba…

37: PHASE FCC_A1 %A 2 1 1 !
38: CONST FCC_A1 : HF B : VA : !

HfB-11Cac.tdb: FCC_A1, type code %A, sha256 5df78501ac600909…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : HF : B VA% : !

HfB-21Pan.tdb: FCC_A1, type code %A, sha256 af0cbca19fdb3a31…

36: PHASE FCC_A1 %A 2 1 1 !
37: CONST FCC_A1 : HF : B VA% : !

HfB-97Bit-LB.tdb: FCC_A1, type code %A, sha256 be69f82e1247105b…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : HF : B VA% : !

Example references (4 of 4; assessments first):

doi:10.1007/BF02646757 H. Bittermann, P. Rogl, J. Phase Equilib., 18, 24-47(1997).
assessment that models this phase
doi:10.1007/s11669-021-00928-3 Yafei Pan, Lei Huang, Jiuxing Zhang, Yong Du, Fenghua Luo, Shuyan Zhang, Thermodynamic Assessment of the Ternary B-Hf-Zr System with Refined B-Hf Description, J. Phase Equilib. Diffus. 42, 864-878 (2021).
assessment that models this phase
doi:10.1016/j.calphad.2009.10.005 L. Kaufman, G. Cacciamani, M.L. Muolo, F. Valenza, A. Passerone, Calphad, 34, 2-5(2010).
assessment that models this phase
doi:10.1016/j.calphad.2011.10.003 G. Cacciamani, P. Riani, F. Valenza, Equilibrium between MB2 (M=Ti,Zr,Hf) UHTC and Ni: A thermodynamic database for the B–Hf–Ni–Ti–Zr system, Calphad 35, 601-619 (2011).
assessment that models this phase

HCP_A3 (B–Hf)

Id: phase:b-hf: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: stable in 4 of 4 calculated diagram(s): 300–2070 K, x(B) 0–0.02014
Literature: 6 values (6 accepted) from 4 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:b-hf:hcp-a3
paper: paper:10.1007/bf02646757:αHf, paper:10.1007/s11669-021-00928-3:(αHf), paper:10.1016/j.calphad.2011.10.003:hcp-Hf, paper:sha256-85fd53a1a176b694:hcp-A3
tdb: tdb:HfB-10Kau.tdb:HCP_A3, tdb:HfB-11Cac.tdb:HCP_A3, tdb:HfB-21Pan.tdb:HCP_A3, tdb:HfB-97Bit-LB.tdb:HCP_A3

TDB models of HCP_A3 (4): PHASE and CONSTITUENT statements as written

HfB-10Kau.tdb: HCP_A3, type code %A, sha256 c2047bb2395431ba…

47: PHASE HCP_A3 %A 2 1 0.5 !
48: CONST HCP_A3 : B HF% : VA : !

HfB-11Cac.tdb: HCP_A3, type code %A, sha256 5df78501ac600909…

39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : HF% : B VA% : !

HfB-21Pan.tdb: HCP_A3, type code %A, sha256 af0cbca19fdb3a31…

46: PHASE HCP_A3 %A 2 1 0.5 !
47: CONST HCP_A3 : HF% : B VA% : !

HfB-97Bit-LB.tdb: HCP_A3, type code %A, sha256 be69f82e1247105b…

41: PHASE HCP_A3 %A 2 1 0.5 !
42: CONST HCP_A3 : HF% : B VA% : !

Example references (4 of 4; assessments first):

doi:10.1007/BF02646757 H. Bittermann, P. Rogl, J. Phase Equilib., 18, 24-47(1997).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11669-021-00928-3 Yafei Pan, Lei Huang, Jiuxing Zhang, Yong Du, Fenghua Luo, Shuyan Zhang, Thermodynamic Assessment of the Ternary B-Hf-Zr System with Refined B-Hf Description, J. Phase Equilib. Diffus. 42, 864-878 (2021).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.003 G. Cacciamani, P. Riani, F. Valenza, Equilibrium between MB2 (M=Ti,Zr,Hf) UHTC and Ni: A thermodynamic database for the B–Hf–Ni–Ti–Zr system, Calphad 35, 601-619 (2011).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2009.10.005 L. Kaufman, G. Cacciamani, M.L. Muolo, F. Valenza, A. Passerone, Calphad, 34, 2-5(2010).
assessment that models this phase

HFB_B27 (B–Hf)

Id: phase:b-hf:hfb-b27; status assigned
Structure: FeB · B27 · oP8 · Pnma (62); type st:b27-feb-op8; 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_token_is_also_a_formula); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: stable in 1 of 1 calculated diagram(s): 300–2373.37 K, x(B) 0.49967–0.5
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:b-hf:hfb-b27
paper: paper:10.1007/s11669-021-00928-3:HfB
tdb: tdb:HfB-21Pan.tdb:HFB_B27

TDB models of HFB_B27 (1): PHASE and CONSTITUENT statements as written

HfB-21Pan.tdb: HFB_B27, type code %, sha256 af0cbca19fdb3a31…

56: PHASE HFB_B27 % 2 1 1 !
57: CONST HFB_B27 : HF : B% HF : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-021-00928-3 Yafei Pan, Lei Huang, Jiuxing Zhang, Yong Du, Fenghua Luo, Shuyan Zhang, Thermodynamic Assessment of the Ternary B-Hf-Zr System with Refined B-Hf Description, J. Phase Equilib. Diffus. 42, 864-878 (2021).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02646757 H. Bittermann, P. Rogl, Critical assessment and thermodynamic calculation of the ternary system boron-hafnium-titanium (B-Hf-Ti), JPE 18, 24-47 (1997).
cited as the source of values for this phase

HFB2_C32 (B–Hf)

Id: phase:b-hf:hfb2-c32; status assigned
Structure: AlB2 · C32 · hP3 · P6/mmm (191); type st:c32-alb2-hp3; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in HfB-21Pan.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–3650.95 K, x(B) 0.66369–0.70713
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:b-hf:hfb2-c32
paper: paper:10.1007/s11669-021-00928-3:HfB2
tdb: tdb:HfB-21Pan.tdb:HFB2_C32

TDB models of HFB2_C32 (1): PHASE and CONSTITUENT statements as written

HfB-21Pan.tdb: HFB2_C32, type code %, sha256 af0cbca19fdb3a31…

61: PHASE HFB2_C32 % 2 1 2 !
62: CONST HFB2_C32 : HF% B : HF B% : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-021-00928-3 Yafei Pan, Lei Huang, Jiuxing Zhang, Yong Du, Fenghua Luo, Shuyan Zhang, Thermodynamic Assessment of the Ternary B-Hf-Zr System with Refined B-Hf Description, J. Phase Equilib. Diffus. 42, 864-878 (2021).
assessment that models this phase; reports values for this phase
doi:10.1007/bf02646757 H. Bittermann, P. Rogl, Critical assessment and thermodynamic calculation of the ternary system boron-hafnium-titanium (B-Hf-Ti), JPE 18, 24-47 (1997).
cited as the source of values for this phase

LIQUID (B–Hf)

Id: phase:b-hf:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 4 of 4 calculated diagram(s): 2148.11–4000 K, x(B) 0–1
Literature: 29 values (29 accepted) from 4 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:b-hf:liquid
paper: paper:10.1007/bf02646757:L, paper:10.1007/s11669-021-00928-3:L, paper:10.1016/j.calphad.2011.10.003:L, paper:sha256-85fd53a1a176b694:Liquid
tdb: tdb:HfB-10Kau.tdb:LIQUID, tdb:HfB-11Cac.tdb:LIQUID, tdb:HfB-21Pan.tdb:LIQUID, tdb:HfB-97Bit-LB.tdb:LIQUID

TDB models of LIQUID (4): PHASE and CONSTITUENT statements as written

HfB-10Kau.tdb: LIQUID, type code %, sha256 c2047bb2395431ba…

32: PHASE LIQUID:L % 1 1 !
33: CONST LIQUID:L : B HF : !

HfB-11Cac.tdb: LIQUID, type code %, sha256 5df78501ac600909…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : B HF : !

HfB-21Pan.tdb: LIQUID, type code %, sha256 af0cbca19fdb3a31…

31: PHASE LIQUID:L % 1 1 !
32: CONST LIQUID:L : B HF : !

HfB-97Bit-LB.tdb: LIQUID, type code %, sha256 be69f82e1247105b…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : B HF : !

Example references (5 of 5; assessments first):

doi:10.1007/BF02646757 H. Bittermann, P. Rogl, J. Phase Equilib., 18, 24-47(1997).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11669-021-00928-3 Yafei Pan, Lei Huang, Jiuxing Zhang, Yong Du, Fenghua Luo, Shuyan Zhang, Thermodynamic Assessment of the Ternary B-Hf-Zr System with Refined B-Hf Description, J. Phase Equilib. Diffus. 42, 864-878 (2021).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.003 G. Cacciamani, P. Riani, F. Valenza, Equilibrium between MB2 (M=Ti,Zr,Hf) UHTC and Ni: A thermodynamic database for the B–Hf–Ni–Ti–Zr system, Calphad 35, 601-619 (2011).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2009.10.005 L. Kaufman, G. Cacciamani, M.L. Muolo, F. Valenza, A. Passerone, Calphad, 34, 2-5(2010).
assessment that models this phase
doi:10.1016/0364-5916(91)90030-n A.T. Dinsdale, SGTE data for pure elements, Calphad 15, 317-425 (1991).
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}
}