Cu–Hf phases

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

Phases of the Cu–Hf system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:cu-hf:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 1812.79–3999.73 K, x(Hf) 0.9556–1	6	3
CU10HF7 phase:cu-hf:cu10hf7	Ni10Zr7 · oC68 · Cmce (64)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 3 of 3 calculated diagram(s): 300–1279.43 K, x(Hf) 0.41176–0.41176	35	3
CU51HF14 phase:cu-hf:cu51hf14	Ag51Gd14 · hP68 · P6/m (175)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 3 of 3 calculated diagram(s): 300–1388 K, x(Hf) 0.21538–0.21538	40	3
CU5HF_C15B phase:cu-hf:cu5hf-c15b	AuBe5 · C15_b · cF24 · F-43m (216)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1332.63 K, x(Hf) 0.16667–0.16667	25	3
CU8HF3 phase:cu-hf:cu8hf3	Cu8Hf3 · oP44 · Pnma (62)	tier B: DFT-supported (unique MP + OQMD match)	stable in 3 of 3 calculated diagram(s): 300–1274.49 K, x(Hf) 0.27273–0.27273	29	3
CUHF2 phase:cu-hf:cuhf2	CuZr2 · tI6 · I4/mmm (139)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 3 of 3 calculated diagram(s): 300–1611.26 K, x(Hf) 0.66667–0.66667	42	3
FCC_A1 phase:cu-hf:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1387.77 K, x(Hf) 0–0.0042	13	3
HCP_A3 phase:cu-hf:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–2501.02 K, x(Hf) 0.99379–1	15	3
LIQUID phase:cu-hf:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 1233.92–4000 K, x(Hf) 0–1	76	3

BCC_A2 (Cu–Hf)

Id: phase:cu-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 3 of 3 calculated diagram(s): 1812.79–3999.73 K, x(Hf) 0.9556–1
Literature: 6 values (6 accepted) from 3 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:cu-hf:bcc-a2
paper: paper:10.1007/s11106-008-9008-4:(βHf), paper:10.1016/j.actamat.2012.10.014:bcc, paper:10.1016/j.jallcom.2006.02.013:bcc
tdb: tdb:CuHf-06Lia.tdb:BCC_A2, tdb:CuHf-08Tur.tdb:BCC_A2, tdb:CuHf-13Zho.tdb:BCC_A2

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

CuHf-06Lia.tdb: BCC_A2, type code %B, sha256 0c635db89455db21…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : CU HF% : VA : !

CuHf-08Tur.tdb: BCC_A2, type code %B, sha256 06d472151340d413…

38: PHASE BCC_A2 %B 2 1 3 !
39: CONST BCC_A2 : CU HF% : VA : !

CuHf-13Zho.tdb: BCC_A2, type code %B, sha256 e3133d3e66ab9d10…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : CU HF% : VA : !

Example references (4 of 4; assessments first):

doi:10.1007/s11106-008-9008-4 M. A. Turchanin, P. G. Agraval, Thermodynamic assessment of the copper-hafnium system, Powder Metall Met Ceram 47, 223-233 (2008).
assessment that models this phase; reports values for this phase
doi:10.1016/j.actamat.2012.10.014 Yu Zhong, Arkapol Saengdeejing, Laszlo Kecskes, Bradley Klotz, Zi-Kui Liu, Experimental and computational studies of the Cu–Hf binary system, Acta Materialia 61, 660-669 (2013).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2006.02.013 Dong Liang, Yajun Liu, Reevaluation of the Cu–Hf binary system, Journal of Alloys and Compounds 426, 101-105 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-3115(74)90184-6 B. Pieraggi, F. Dabosi, M. Armand, Diagramme de phases des alliages hafnium-cuivre riches en hafnium, Journal of Nuclear Materials 52, 336-338 (1974).
cited as the source of values for this phase

CU10HF7 (Cu–Hf)

Id: phase:cu-hf:cu10hf7; status assigned
Structure: Ni10Zr7 · oC68 · Cmce (64); type st:ni10zr7-oc68; 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 (mp_oqmd_space_groups_differ, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Cu 0.5882, Hf 0.4118
Stability: stable in 3 of 3 calculated diagram(s): 300–1279.43 K, x(Hf) 0.41176–0.41176
Literature: 35 values (34 accepted) from 3 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:cu-hf:cu10hf7
paper: paper:10.1007/s11106-008-9008-4:Cu10Hf7, paper:10.1016/j.actamat.2012.10.014:Cu10Hf7, paper:10.1016/j.jallcom.2006.02.013:Cu10Hf7
tdb: tdb:CuHf-06Lia.tdb:CU10HF7, tdb:CuHf-08Tur.tdb:CU10HF7, tdb:CuHf-13Zho.tdb:CU10HF7

TDB models of CU10HF7 (3): PHASE and CONSTITUENT statements as written

CuHf-06Lia.tdb: CU10HF7, type code %, sha256 0c635db89455db21…

55: PHASE CU10HF7 % 2 10 7 !
56: CONST CU10HF7 : CU : HF : !

CuHf-08Tur.tdb: CU10HF7, type code %, sha256 06d472151340d413…

63: PHASE CU10HF7 % 2 10 7 !
64: CONST CU10HF7 : CU : HF : !

CuHf-13Zho.tdb: CU10HF7, type code %, sha256 e3133d3e66ab9d10…

57: PHASE CU10HF7 % 2 10 7 !
58: CONST CU10HF7 : CU : HF : !

Example references (9 of 9; assessments first):

doi:10.1016/j.actamat.2012.10.014 Yu Zhong, Arkapol Saengdeejing, Laszlo Kecskes, Bradley Klotz, Zi-Kui Liu, Experimental and computational studies of the Cu–Hf binary system, Acta Materialia 61, 660-669 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11106-008-9008-4 M. A. Turchanin, P. G. Agraval, Thermodynamic assessment of the copper-hafnium system, Powder Metall Met Ceram 47, 223-233 (2008).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2006.02.013 Dong Liang, Yajun Liu, Reevaluation of the Cu–Hf binary system, Journal of Alloys and Compounds 426, 101-105 (2006).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1107/s0108270197007142 J.-M. Joubert, R. Cerný, K. Yvon, M. Latroche, A. Percheron-Guégan, Zirconium–Nickel, Zr7Ni10: Space Group Revision for the Stoichiometric Phase, Acta Crystallogr C Cryst Struct Commun 53, 1536-1538 (1997).
cited as the source of values for this phase
doi:10.1007/bf02877460 P.R. Subramanian, D.E. Laughlin, Bull. Alloy Phase Diagrams 9 (1) (1988) 51–55.
cited as the source of values for this phase
doi:10.1007/bf02667755 O. J. Kleppa, Shunroku Watanabe, Thermochemistry of alloys of transition metals: Part III. Copper-Silver, -Titanium, Zirconium, and -Hafnium at 1373 K, Metall Trans B 13, 391-401 (1982).
cited as the source of values for this phase
doi:10.1007/bf02736446 R. H. Woodman, B. R. Klotz, L. J. Kecskes, Observation of incongruent melting in Cu10Hf7, JPED 27, 477-481 (2006).
cited as the source of values for this phase
doi:10.1016/0022-3115(74)90184-6 B. Pieraggi, F. Dabosi, M. Armand, Diagramme de phases des alliages hafnium-cuivre riches en hafnium, Journal of Nuclear Materials 52, 336-338 (1974).
cited as the source of values for this phase
doi:10.1016/j.actamat.2007.01.037 G. Ghosh, First-principles calculations of structural energetics of Cu–TM (TM=Ti, Zr, Hf) intermetallics, Acta Materialia 55, 3347-3374 (2007).
cited as the source of values for this phase

CU51HF14 (Cu–Hf)

Id: phase:cu-hf:cu51hf14; status assigned
Structure: Ag51Gd14 · hP68 · P6/m (175); type st:ag51gd14-hp68; 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_on_hull_entry_in_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Cu 0.7846, Hf 0.2154
Stability: stable in 3 of 3 calculated diagram(s): 300–1388 K, x(Hf) 0.21538–0.21538
Literature: 40 values (39 accepted) from 3 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:cu-hf:cu51hf14
paper: paper:10.1007/s11106-008-9008-4:Cu51Hf14, paper:10.1016/j.actamat.2012.10.014:Cu51Hf14, paper:10.1016/j.jallcom.2006.02.013:Cu51Hf14
tdb: tdb:CuHf-06Lia.tdb:CU51HF14, tdb:CuHf-08Tur.tdb:CU51HF14, tdb:CuHf-13Zho.tdb:CU51HF14

TDB models of CU51HF14 (3): PHASE and CONSTITUENT statements as written

CuHf-06Lia.tdb: CU51HF14, type code %, sha256 0c635db89455db21…

45: PHASE CU51HF14 % 2 51 14 !
46: CONST CU51HF14 : CU : HF : !

CuHf-08Tur.tdb: CU51HF14, type code %, sha256 06d472151340d413…

53: PHASE CU51HF14 % 2 51 14 !
54: CONST CU51HF14 : CU : HF : !

CuHf-13Zho.tdb: CU51HF14, type code %, sha256 e3133d3e66ab9d10…

47: PHASE CU51HF14 % 2 51 14 !
48: CONST CU51HF14 : CU : HF : !

Example references (9 of 9; assessments first):

doi:10.1016/j.actamat.2012.10.014 Yu Zhong, Arkapol Saengdeejing, Laszlo Kecskes, Bradley Klotz, Zi-Kui Liu, Experimental and computational studies of the Cu–Hf binary system, Acta Materialia 61, 660-669 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11106-008-9008-4 M. A. Turchanin, P. G. Agraval, Thermodynamic assessment of the copper-hafnium system, Powder Metall Met Ceram 47, 223-233 (2008).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2006.02.013 Dong Liang, Yajun Liu, Reevaluation of the Cu–Hf binary system, Journal of Alloys and Compounds 426, 101-105 (2006).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1107/s0567740875003378 J.-P. Gabathuler, P. White, E. Parthé, Zr14Cu51 and Hf14Cu51 with GdAg3.6 structure type, Acta Crystallogr B Struct Sci 31, 608-610 (1975).
cited as the source of values for this phase
doi:10.1007/bf02877460 P.R. Subramanian, D.E. Laughlin, Bull. Alloy Phase Diagrams 9 (1) (1988) 51–55.
cited as the source of values for this phase
doi:10.1016/0025-5416(74)90021-4 A.J Perry, Copper-Cu5Hf alloys: Their constitution and some properties after directional solidification, Materials Science and Engineering 13, 57-62 (1974).
cited as the source of values for this phase
doi:10.1007/bf02667755 O. J. Kleppa, Shunroku Watanabe, Thermochemistry of alloys of transition metals: Part III. Copper-Silver, -Titanium, Zirconium, and -Hafnium at 1373 K, Metall Trans B 13, 391-401 (1982).
cited as the source of values for this phase
doi:10.1016/0022-3115(74)90184-6 B. Pieraggi, F. Dabosi, M. Armand, Diagramme de phases des alliages hafnium-cuivre riches en hafnium, Journal of Nuclear Materials 52, 336-338 (1974).
cited as the source of values for this phase
doi:10.1016/j.actamat.2007.01.037 G. Ghosh, First-principles calculations of structural energetics of Cu–TM (TM=Ti, Zr, Hf) intermetallics, Acta Materialia 55, 3347-3374 (2007).
cited as the source of values for this phase

CU5HF_C15B (Cu–Hf)

Id: phase:cu-hf:cu5hf-c15b; status assigned
Structure: AuBe5 · C15_b · cF24 · F-43m (216); type st:c15-b-aube5-cf24; tier A: standard phase name; confidence high
Stoichiometry: Cu 0.8333, Hf 0.1667
Stability: stable in 3 of 3 calculated diagram(s): 300–1332.63 K, x(Hf) 0.16667–0.16667
Literature: 25 values (24 accepted) from 3 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:cu-hf:cu5hf-c15b
paper: paper:10.1007/s11106-008-9008-4:Cu5Hf, paper:10.1016/j.actamat.2012.10.014:Cu5Hf, paper:10.1016/j.jallcom.2006.02.013:Cu5Hf
tdb: tdb:CuHf-06Lia.tdb:CU5HF_C15B, tdb:CuHf-08Tur.tdb:CU5HF_C15B, tdb:CuHf-13Zho.tdb:CU5HF_C15B

TDB models of CU5HF_C15B (3): PHASE and CONSTITUENT statements as written

CuHf-06Lia.tdb: CU5HF_C15B, type code %, sha256 0c635db89455db21…

40: PHASE CU5HF_C15B % 2 5 1 !
41: CONST CU5HF_C15B : CU : HF : !

CuHf-08Tur.tdb: CU5HF_C15B, type code %, sha256 06d472151340d413…

48: PHASE CU5HF_C15B % 2 5 1 !
49: CONST CU5HF_C15B : CU : HF : !

CuHf-13Zho.tdb: CU5HF_C15B, type code %, sha256 e3133d3e66ab9d10…

42: PHASE CU5HF_C15B % 2 5 1 !
43: CONST CU5HF_C15B : CU : HF : !

Example references (5 of 5; assessments first):

doi:10.1016/j.actamat.2012.10.014 Yu Zhong, Arkapol Saengdeejing, Laszlo Kecskes, Bradley Klotz, Zi-Kui Liu, Experimental and computational studies of the Cu–Hf binary system, Acta Materialia 61, 660-669 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11106-008-9008-4 M. A. Turchanin, P. G. Agraval, Thermodynamic assessment of the copper-hafnium system, Powder Metall Met Ceram 47, 223-233 (2008).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2006.02.013 Dong Liang, Yajun Liu, Reevaluation of the Cu–Hf binary system, Journal of Alloys and Compounds 426, 101-105 (2006).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/0025-5416(74)90021-4 A.J Perry, Copper-Cu5Hf alloys: Their constitution and some properties after directional solidification, Materials Science and Engineering 13, 57-62 (1974).
cited as the source of values for this phase
doi:10.1016/j.actamat.2007.01.037 G. Ghosh, First-principles calculations of structural energetics of Cu–TM (TM=Ti, Zr, Hf) intermetallics, Acta Materialia 55, 3347-3374 (2007).
cited as the source of values for this phase

CU8HF3 (Cu–Hf)

Id: phase:cu-hf:cu8hf3; status assigned
Structure: Cu8Hf3 · oP44 · Pnma (62); type st:cu8hf3-op44; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Cu 0.7273, Hf 0.2727
Stability: stable in 3 of 3 calculated diagram(s): 300–1274.49 K, x(Hf) 0.27273–0.27273
Literature: 29 values (29 accepted) from 3 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:cu-hf:cu8hf3
mp: mp:mp-aaaaakwv
oqmd: oqmd:oqmd-32345
paper: paper:10.1007/s11106-008-9008-4:Cu8Hf3, paper:10.1016/j.actamat.2012.10.014:Cu8Hf3, paper:10.1016/j.jallcom.2006.02.013:Cu8Hf3
tdb: tdb:CuHf-06Lia.tdb:CU8HF3, tdb:CuHf-08Tur.tdb:CU8HF3, tdb:CuHf-13Zho.tdb:CU8HF3

TDB models of CU8HF3 (3): PHASE and CONSTITUENT statements as written

CuHf-06Lia.tdb: CU8HF3, type code %, sha256 0c635db89455db21…

50: PHASE CU8HF3 % 2 8 3 !
51: CONST CU8HF3 : CU : HF : !

CuHf-08Tur.tdb: CU8HF3, type code %, sha256 06d472151340d413…

58: PHASE CU8HF3 % 2 8 3 !
59: CONST CU8HF3 : CU : HF : !

CuHf-13Zho.tdb: CU8HF3, type code %, sha256 e3133d3e66ab9d10…

52: PHASE CU8HF3 % 2 8 3 !
53: CONST CU8HF3 : CU : HF : !

Example references (6 of 6; assessments first):

doi:10.1016/j.actamat.2012.10.014 Yu Zhong, Arkapol Saengdeejing, Laszlo Kecskes, Bradley Klotz, Zi-Kui Liu, Experimental and computational studies of the Cu–Hf binary system, Acta Materialia 61, 660-669 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11106-008-9008-4 M. A. Turchanin, P. G. Agraval, Thermodynamic assessment of the copper-hafnium system, Powder Metall Met Ceram 47, 223-233 (2008).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2006.02.013 Dong Liang, Yajun Liu, Reevaluation of the Cu–Hf binary system, Journal of Alloys and Compounds 426, 101-105 (2006).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/0022-5088(75)90085-5 Lars Bsenko, Crystallographic data for intermediate phases in the copper-zirconium and copper-hafnium systems, Journal of the Less Common Metals 40, 365-366 (1975).
cited as the source of values for this phase
doi:10.1007/bf02877460 P.R. Subramanian, D.E. Laughlin, Bull. Alloy Phase Diagrams 9 (1) (1988) 51–55.
cited as the source of values for this phase
doi:10.1016/j.actamat.2007.01.037 G. Ghosh, First-principles calculations of structural energetics of Cu–TM (TM=Ti, Zr, Hf) intermetallics, Acta Materialia 55, 3347-3374 (2007).
cited as the source of values for this phase

CUHF2 (Cu–Hf)

Id: phase:cu-hf:cuhf2; status assigned
Structure: CuZr2 · tI6 · I4/mmm (139); type st:cuzr2-ti6; 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 (mp_oqmd_space_groups_differ, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Cu 0.3333, Hf 0.6667
Stability: stable in 3 of 3 calculated diagram(s): 300–1611.26 K, x(Hf) 0.66667–0.66667
Literature: 42 values (41 accepted) from 3 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:cu-hf:cuhf2
paper: paper:10.1007/s11106-008-9008-4:CuHf2, paper:10.1016/j.actamat.2012.10.014:CuHf2, paper:10.1016/j.jallcom.2006.02.013:CuHf2
tdb: tdb:CuHf-06Lia.tdb:CUHF2, tdb:CuHf-08Tur.tdb:CUHF2, tdb:CuHf-13Zho.tdb:CUHF2

TDB models of CUHF2 (3): PHASE and CONSTITUENT statements as written

CuHf-06Lia.tdb: CUHF2, type code %, sha256 0c635db89455db21…

60: PHASE CUHF2 % 2 1 2 !
61: CONST CUHF2 : CU : HF : !

CuHf-08Tur.tdb: CUHF2, type code %, sha256 06d472151340d413…

68: PHASE CUHF2 % 2 1 2 !
69: CONST CUHF2 : CU : HF : !

CuHf-13Zho.tdb: CUHF2, type code %, sha256 e3133d3e66ab9d10…

62: PHASE CUHF2 % 2 1 2 !
63: CONST CUHF2 : CU : HF : !

Example references (8 of 8; assessments first):

doi:10.1016/j.actamat.2012.10.014 Yu Zhong, Arkapol Saengdeejing, Laszlo Kecskes, Bradley Klotz, Zi-Kui Liu, Experimental and computational studies of the Cu–Hf binary system, Acta Materialia 61, 660-669 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11106-008-9008-4 M. A. Turchanin, P. G. Agraval, Thermodynamic assessment of the copper-hafnium system, Powder Metall Met Ceram 47, 223-233 (2008).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jallcom.2006.02.013 Dong Liang, Yajun Liu, Reevaluation of the Cu–Hf binary system, Journal of Alloys and Compounds 426, 101-105 (2006).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/0022-3115(74)90184-6 B. Pieraggi, F. Dabosi, M. Armand, Diagramme de phases des alliages hafnium-cuivre riches en hafnium, Journal of Nuclear Materials 52, 336-338 (1974).
cited as the source of values for this phase
doi:10.1007/bf02667755 O. J. Kleppa, Shunroku Watanabe, Thermochemistry of alloys of transition metals: Part III. Copper-Silver, -Titanium, Zirconium, and -Hafnium at 1373 K, Metall Trans B 13, 391-401 (1982).
cited as the source of values for this phase
doi:10.1007/bf02736446 R. H. Woodman, B. R. Klotz, L. J. Kecskes, Observation of incongruent melting in Cu10Hf7, JPED 27, 477-481 (2006).
cited as the source of values for this phase
doi:10.1007/bf02877460 P.R. Subramanian, D.E. Laughlin, Bull. Alloy Phase Diagrams 9 (1) (1988) 51–55.
cited as the source of values for this phase
doi:10.1016/j.actamat.2007.01.037 G. Ghosh, First-principles calculations of structural energetics of Cu–TM (TM=Ti, Zr, Hf) intermetallics, Acta Materialia 55, 3347-3374 (2007).
cited as the source of values for this phase

FCC_A1 (Cu–Hf)

Id: phase:cu-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: stable in 3 of 3 calculated diagram(s): 300–1387.77 K, x(Hf) 0–0.0042
Literature: 13 values (12 accepted) from 3 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:cu-hf:fcc-a1
paper: paper:10.1007/s11106-008-9008-4:(Cu), paper:10.1016/j.actamat.2012.10.014:fcc, paper:10.1016/j.jallcom.2006.02.013:fcc
tdb: tdb:CuHf-06Lia.tdb:FCC_A1, tdb:CuHf-08Tur.tdb:FCC_A1, tdb:CuHf-13Zho.tdb:FCC_A1

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

CuHf-06Lia.tdb: FCC_A1, type code %A, sha256 0c635db89455db21…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : CU% HF : VA : !

CuHf-08Tur.tdb: FCC_A1, type code %A, sha256 06d472151340d413…

33: PHASE FCC_A1 %A 2 1 1 !
34: CONST FCC_A1 : CU% HF : VA : !

CuHf-13Zho.tdb: FCC_A1, type code %A, sha256 e3133d3e66ab9d10…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : CU% HF : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.actamat.2012.10.014 Yu Zhong, Arkapol Saengdeejing, Laszlo Kecskes, Bradley Klotz, Zi-Kui Liu, Experimental and computational studies of the Cu–Hf binary system, Acta Materialia 61, 660-669 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11106-008-9008-4 M. A. Turchanin, P. G. Agraval, Thermodynamic assessment of the copper-hafnium system, Powder Metall Met Ceram 47, 223-233 (2008).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2006.02.013 Dong Liang, Yajun Liu, Reevaluation of the Cu–Hf binary system, Journal of Alloys and Compounds 426, 101-105 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/0025-5416(74)90021-4 A.J Perry, Copper-Cu5Hf alloys: Their constitution and some properties after directional solidification, Materials Science and Engineering 13, 57-62 (1974).
cited as the source of values for this phase

HCP_A3 (Cu–Hf)

Id: phase:cu-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 3 of 3 calculated diagram(s): 300–2501.02 K, x(Hf) 0.99379–1
Literature: 15 values (14 accepted) from 3 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:cu-hf:hcp-a3
paper: paper:10.1007/s11106-008-9008-4:(αHf), paper:10.1016/j.actamat.2012.10.014:hcp, paper:10.1016/j.jallcom.2006.02.013:hcp
tdb: tdb:CuHf-06Lia.tdb:HCP_A3, tdb:CuHf-08Tur.tdb:HCP_A3, tdb:CuHf-13Zho.tdb:HCP_A3

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

CuHf-06Lia.tdb: HCP_A3, type code %A, sha256 0c635db89455db21…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : CU HF% : VA : !

CuHf-08Tur.tdb: HCP_A3, type code %A, sha256 06d472151340d413…

43: PHASE HCP_A3 %A 2 1 0.5 !
44: CONST HCP_A3 : CU HF% : VA : !

CuHf-13Zho.tdb: HCP_A3, type code %A, sha256 e3133d3e66ab9d10…

37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : CU HF% : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.actamat.2012.10.014 Yu Zhong, Arkapol Saengdeejing, Laszlo Kecskes, Bradley Klotz, Zi-Kui Liu, Experimental and computational studies of the Cu–Hf binary system, Acta Materialia 61, 660-669 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11106-008-9008-4 M. A. Turchanin, P. G. Agraval, Thermodynamic assessment of the copper-hafnium system, Powder Metall Met Ceram 47, 223-233 (2008).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2006.02.013 Dong Liang, Yajun Liu, Reevaluation of the Cu–Hf binary system, Journal of Alloys and Compounds 426, 101-105 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-3115(74)90184-6 B. Pieraggi, F. Dabosi, M. Armand, Diagramme de phases des alliages hafnium-cuivre riches en hafnium, Journal of Nuclear Materials 52, 336-338 (1974).
cited as the source of values for this phase

LIQUID (Cu–Hf)

Id: phase:cu-hf:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 1233.92–4000 K, x(Hf) 0–1
Literature: 76 values (73 accepted) from 3 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:cu-hf:liquid
paper: paper:10.1007/s11106-008-9008-4:L, paper:10.1016/j.actamat.2012.10.014:L, paper:10.1016/j.actamat.2012.10.014:Liquid, paper:10.1016/j.actamat.2012.10.014:liquid, paper:10.1016/j.jallcom.2006.02.013:Liquid, paper:10.1016/j.jallcom.2006.02.013:liquid
tdb: tdb:CuHf-06Lia.tdb:LIQUID, tdb:CuHf-08Tur.tdb:LIQUID, tdb:CuHf-13Zho.tdb:LIQUID

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

CuHf-06Lia.tdb: LIQUID, type code %, sha256 0c635db89455db21…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : CU HF : !

CuHf-08Tur.tdb: LIQUID, type code %, sha256 06d472151340d413…

28: PHASE LIQUID:L % 1 1 !
29: CONST LIQUID:L : CU CUHF CUHF3 HF : !

CuHf-13Zho.tdb: LIQUID, type code %, sha256 e3133d3e66ab9d10…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : CU HF : !

Example references (7 of 7; assessments first):

doi:10.1016/j.actamat.2012.10.014 Yu Zhong, Arkapol Saengdeejing, Laszlo Kecskes, Bradley Klotz, Zi-Kui Liu, Experimental and computational studies of the Cu–Hf binary system, Acta Materialia 61, 660-669 (2013).
assessment that models this phase; reports values for this phase
doi:10.1007/s11106-008-9008-4 M. A. Turchanin, P. G. Agraval, Thermodynamic assessment of the copper-hafnium system, Powder Metall Met Ceram 47, 223-233 (2008).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jallcom.2006.02.013 Dong Liang, Yajun Liu, Reevaluation of the Cu–Hf binary system, Journal of Alloys and Compounds 426, 101-105 (2006).
assessment that models this phase; reports values for this phase
doi:10.1016/0022-3115(74)90184-6 B. Pieraggi, F. Dabosi, M. Armand, Diagramme de phases des alliages hafnium-cuivre riches en hafnium, Journal of Nuclear Materials 52, 336-338 (1974).
cited as the source of values for this phase
doi:10.1007/bf02877460 P.R. Subramanian, D.E. Laughlin, Bull. Alloy Phase Diagrams 9 (1) (1988) 51–55.
cited as the source of values for this phase
doi:10.1016/0025-5416(74)90021-4 A.J Perry, Copper-Cu5Hf alloys: Their constitution and some properties after directional solidification, Materials Science and Engineering 13, 57-62 (1974).
cited as the source of values for this phase
doi:10.1007/bf02736446 R. H. Woodman, B. R. Klotz, L. J. Kecskes, Observation of incongruent melting in Cu10Hf7, JPED 27, 477-481 (2006).
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}
}