Au–Hf phases
12 phases (tier A 6, tier C 3, liquid 1, needs_review 2); 12 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 · Au–Hf system page · Markdown · field reference
| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---|---|
| AU10HF7 phase:au-hf:au10hf7 | Ni10Zr7 · oC68 · Cmce (64) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1785.98 K, x(Hf) 0.41176–0.41176 | 4 | 1 |
| AU2HF_C11B phase:au-hf:au2hf-c11b | MoSi2 · C11_b · tI6 · I4/mmm (139) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1926.8 K, x(Hf) 0.29302–0.33333 | 8 | 1 |
| AU3HF_D0A phase:au-hf:au3hf-d0a | beta-Cu3Ti · D0_a · oP8 · Pmmn (59) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1815.44 K, x(Hf) 0.25–0.25 | 4 | 1 |
| AU4HF phase:au-hf:au4hf | Au4Zr · oP20 · Pnma (62) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1570.94 K, x(Hf) 0.2–0.2 | 4 | 1 |
| AU5HF_D1A phase:au-hf:au5hf-d1a | needs_review | stable in 1 of 1 calculated diagram(s): 300–1418.11 K, x(Hf) 0.14625–0.16667 | 4 | 1 | |
| AUHF_B11 phase:au-hf:auhf-b11 | CuTi-gamma · B11 · tP4 · P4/nmm (129) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1386.92 K, x(Hf) 0.47532–0.5 | 4 | 1 |
| AUHF_BETA phase:au-hf:auhf-beta | needs_review | stable in 1 of 1 calculated diagram(s): 1303.96–4000 K, x(Hf) 0–0.49993 | 12 | 1 | |
| AUHF2 phase:au-hf:auhf2 | CuZr2 · tI6 · I4/mmm (139) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–1793.02 K, x(Hf) 0.66667–0.66667 | 10 | 1 |
| BCC_A2 phase:au-hf:bcc-a2 | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1559.13–3999.68 K, x(Hf) 0.87087–1 | 4 | 1 |
| FCC_A1 phase:au-hf:fcc-a1 | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1373.06 K, x(Hf) 0–0.09286 | 2 | 1 |
| HCP_A3 phase:au-hf:hcp-a3 | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–2504.13 K, x(Hf) 0.97148–1 | 2 | 1 |
| LIQUID phase:au-hf:liquid | liquid | liquid | stable in 1 of 1 calculated diagram(s): 1337.33–4000 K, x(Hf) 0–1 | 20 | 1 |
AU10HF7 (Au–Hf)
- Id:
phase:au-hf:au10hf7; statusassigned - 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 (no_on_hull_entry_in_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Au 0.5882, Hf 0.4118
- Stability: stable in 1 of 1 calculated diagram(s): 300–1785.98 K, x(Hf) 0.41176–0.41176
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:au-hf:au10hf7
paper: paper:10.1016/s0925-8388(02)01293-8:Au10Hf7
tdb: tdb:AuHf-03Du-LB.tdb:AU10HF7
TDB models of AU10HF7 (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: AU10HF7, type code %, sha256 3f1b621c7e2af58a…
67: PHASE AU10HF7 % 2 10 7 ! 68: CONST AU10HF7 : AU : HF : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase
AU2HF_C11B (Au–Hf)
- Id:
phase:au-hf:au2hf-c11b; statusassigned - Structure: MoSi2 · C11_b · tI6 · I4/mmm (139); type
st:c11-b-mosi2-ti6; tier A: standard phase name; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 300–1926.8 K, x(Hf) 0.29302–0.33333
- Literature: 8 values (8 accepted) from 1 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:au-hf:au2hf-c11b
paper: paper:10.1016/s0925-8388(02)01293-8:Au2Hf
tdb: tdb:AuHf-03Du-LB.tdb:AU2HF_C11B
TDB models of AU2HF_C11B (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: AU2HF_C11B, type code %, sha256 3f1b621c7e2af58a…
62: PHASE AU2HF_C11B % 2 2 1 ! 63: CONST AU2HF_C11B : AU : AU HF% : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase
AU3HF_D0A (Au–Hf)
- Id:
phase:au-hf:au3hf-d0a; statusassigned - Structure: beta-Cu3Ti · D0_a · oP8 · Pmmn (59); type
st:d0-a-beta-cu3ti-op8; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaacjkpk and oqmd-28169, space group 59
- Stoichiometry: Au 0.7500, Hf 0.2500
- Stability: stable in 1 of 1 calculated diagram(s): 300–1815.44 K, x(Hf) 0.25–0.25
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: phase registry entry
Names (5): corpus: corpus:phase:au-hf:au3hf-d0a
mp: mp:mp-aaacjkpk
oqmd: oqmd:oqmd-28169
paper: paper:10.1016/s0925-8388(02)01293-8:Au3Hf
tdb: tdb:AuHf-03Du-LB.tdb:AU3HF_D0A
TDB models of AU3HF_D0A (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: AU3HF_D0A, type code %, sha256 3f1b621c7e2af58a…
57: PHASE AU3HF_D0A % 2 3 1 ! 58: CONST AU3HF_D0A : AU : HF : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase
AU4HF (Au–Hf)
- Id:
phase:au-hf:au4hf; statusassigned - Structure: Au4Zr · oP20 · Pnma (62); type
st:au4zr-op20; 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_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Au 0.8000, Hf 0.2000
- Stability: stable in 1 of 1 calculated diagram(s): 300–1570.94 K, x(Hf) 0.2–0.2
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:au-hf:au4hf
paper: paper:10.1016/s0925-8388(02)01293-8:Au4Hf
tdb: tdb:AuHf-03Du-LB.tdb:AU4HF
TDB models of AU4HF (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: AU4HF, type code %, sha256 3f1b621c7e2af58a…
52: PHASE AU4HF % 2 4 1 ! 53: CONST AU4HF : AU : HF : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase
AU5HF_D1A (Au–Hf)
- Id:
phase:au-hf:au5hf-d1a; statusneeds_review - No structure assigned. Why: assessment_declared_blocked_by:site_ratios_contradict_D1_a; site_ratios_contradict_D1_a:AuHf-03Du-LB.tdb
- Candidate (literature_printed): MoNi4 · tI10 — printed with a label mapped to this phase
- Candidate (name_token): MoNi4 · D1_a · tI10 · I4/m (87) — Strukturbericht/word 'D1A' in the TDB name
- Candidate (sgte_mmc2): MoNi4 · D1_a · tI10 · I4/m (87) — Hallstedt 2025 mmc2 row for AU5HF_D1A: Au5Hf
- Candidate (tdb_comment): MoNi4 · tI10 · I4/m — AuHf-03Du-LB.tdb: 'Prototype MoNi4 (tI10, I4/m)'
- Stability: stable in 1 of 1 calculated diagram(s): 300–1418.11 K, x(Hf) 0.14625–0.16667
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:au-hf:au5hf-d1a
paper: paper:10.1016/s0925-8388(02)01293-8:Au5Hf
tdb: tdb:AuHf-03Du-LB.tdb:AU5HF_D1A
TDB models of AU5HF_D1A (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: AU5HF_D1A, type code %, sha256 3f1b621c7e2af58a…
47: PHASE AU5HF_D1A % 2 5 1 ! 48: CONST AU5HF_D1A : AU : AU HF% : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase
AUHF_B11 (Au–Hf)
- Id:
phase:au-hf:auhf-b11; statusassigned - Structure: CuTi-gamma · B11 · tP4 · P4/nmm (129); type
st:b11-cuti-gamma-tp4; tier A: standard phase name; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 300–1386.92 K, x(Hf) 0.47532–0.5
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:au-hf:auhf-b11
paper: paper:10.1016/s0925-8388(02)01293-8:αAuHf
tdb: tdb:AuHf-03Du-LB.tdb:AUHF_B11
TDB models of AUHF_B11 (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: AUHF_B11, type code %, sha256 3f1b621c7e2af58a…
72: PHASE AUHF_B11 % 2 1 1 ! 73: CONST AUHF_B11 : AU : AU HF% : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase
AUHF_BETA (Au–Hf)
- Id:
phase:au-hf:auhf-beta; statusneeds_review - No structure assigned. Why: no_structure_token; off_stoichiometric_model
- Candidate (dft_mp): Cmce (64) — on-hull MP Hf7Au10 at x(HF)=0.4118
- Candidate (dft_mp): I4/mmm (139) — on-hull MP HfAu2 at x(HF)=0.3333
- Candidate (dft_mp): Pmmn (59) — on-hull MP HfAu3 at x(HF)=0.2500
- Candidate (dft_oqmd): I4/mmm (139) — on-hull OQMD Au2 Hf1 at x(HF)=0.3333
- Candidate (dft_oqmd): Pmmn (59) — on-hull OQMD Au3 Hf1 at x(HF)=0.2500
- Candidate (dft_oqmd): Pnma (62) — on-hull OQMD Au4 Hf1 at x(HF)=0.2000
- Candidate (dft_oqmd): I4/mmm (139) — on-hull OQMD Au4 Hf3 at x(HF)=0.4286
- Candidate (sgte_mmc2): (AuHf-beta) — Hallstedt 2025 mmc2 row for AUHF_BETA: AuHf-beta
- Stability: stable in 1 of 1 calculated diagram(s): 1303.96–4000 K, x(Hf) 0–0.49993
- Literature: 12 values (12 accepted) from 1 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:au-hf:auhf-beta
paper: paper:10.1016/s0925-8388(02)01293-8:βAuHf
tdb: tdb:AuHf-03Du-LB.tdb:AUHF_BETA
TDB models of AUHF_BETA (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: AUHF_BETA, type code %, sha256 3f1b621c7e2af58a…
77: PHASE AUHF_BETA % 2 1 1 ! 78: CONST AUHF_BETA : AU : AU HF% : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase
AUHF2 (Au–Hf)
- Id:
phase:au-hf:auhf2; statusassigned - 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 (dft_space_group_139_matches_5_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Au 0.3333, Hf 0.6667
- Stability: stable in 1 of 1 calculated diagram(s): 300–1793.02 K, x(Hf) 0.66667–0.66667
- Literature: 10 values (10 accepted) from 1 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:au-hf:auhf2
paper: paper:10.1016/s0925-8388(02)01293-8:AuHf2
tdb: tdb:AuHf-03Du-LB.tdb:AUHF2
TDB models of AUHF2 (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: AUHF2, type code %, sha256 3f1b621c7e2af58a…
82: PHASE AUHF2 % 2 1 2 ! 83: CONST AUHF2 : AU : HF : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase
BCC_A2 (Au–Hf)
- Id:
phase:au-hf: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 1 of 1 calculated diagram(s): 1559.13–3999.68 K, x(Hf) 0.87087–1
- Literature: 4 values (4 accepted) from 1 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:au-hf:bcc-a2
paper: paper:10.1016/s0925-8388(02)01293-8:bcc(Hf)
tdb: tdb:AuHf-03Du-LB.tdb:BCC_A2
TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: BCC_A2, type code %B, sha256 3f1b621c7e2af58a…
37: PHASE BCC_A2 %B 2 1 3 ! 38: CONST BCC_A2 : AU HF% : VA : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase
FCC_A1 (Au–Hf)
- Id:
phase:au-hf:fcc-a1; statusassigned - Structure: Cu · A1 · cF4 · Fm-3m (225); type
st:a1-cu-cf4; tier A: standard phase name; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 300–1373.06 K, x(Hf) 0–0.09286
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:au-hf:fcc-a1
paper: paper:10.1016/s0925-8388(02)01293-8:fcc(Au)
tdb: tdb:AuHf-03Du-LB.tdb:FCC_A1
TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: FCC_A1, type code %A, sha256 3f1b621c7e2af58a…
32: PHASE FCC_A1 %A 2 1 1 ! 33: CONST FCC_A1 : AU% HF : VA : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase
HCP_A3 (Au–Hf)
- Id:
phase:au-hf:hcp-a3; statusassigned - Structure: Mg · A3 · hP2 · P6_3/mmc (194); type
st:a3-mg-hp2; tier A: standard phase name; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 300–2504.13 K, x(Hf) 0.97148–1
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:au-hf:hcp-a3
paper: paper:10.1016/s0925-8388(02)01293-8:hcp(Hf)
tdb: tdb:AuHf-03Du-LB.tdb:HCP_A3
TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: HCP_A3, type code %A, sha256 3f1b621c7e2af58a…
42: PHASE HCP_A3 %A 2 1 0.5 ! 43: CONST HCP_A3 : AU HF% : VA : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase
LIQUID (Au–Hf)
- Id:
phase:au-hf:liquid; statusassigned - Structure: liquid; type
st:liquid; liquid; confidence high - Stability: stable in 1 of 1 calculated diagram(s): 1337.33–4000 K, x(Hf) 0–1
- Literature: 20 values (20 accepted) from 1 papers
- Interactive: phase registry entry
Names (3): corpus: corpus:phase:au-hf:liquid
paper: paper:10.1016/s0925-8388(02)01293-8:liq.
tdb: tdb:AuHf-03Du-LB.tdb:LIQUID
TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written
AuHf-03Du-LB.tdb: LIQUID, type code %, sha256 3f1b621c7e2af58a…
27: PHASE LIQUID:L % 1 1 ! 28: CONST LIQUID:L : AU HF : !
Example references (2 of 2; assessments first):
- doi:10.1016/S0925-8388(02)01293-8 Z. Du, L. Yang, J. Alloys Compd., 353, 213-16(2003).
assessment that models this phase; reports values for this phase - doi:10.1016/s0925-8388(99)00529-0 M Lomello-Tafin, Ph Galez, P Feschotte, J.L Jorda, The Hf–Au system, Journal of Alloys and Compounds 296, 103-111 (2000).
cited as the source of values for this phase