# Cu–Mg phases > Cu–Mg system: 7 phases (tier A 6, liquid 1); 6 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references. HTML: https://data.orchid-project.org/phases/pages/CU-MG.html · Markdown: https://data.orchid-project.org/phases/pages/CU-MG.md 7 phases (tier A 6, liquid 1); 6 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](https://orchid-project.org/phases/?q=CU-MG) · [full JSON](https://data.orchid-project.org/phases/systems/CU-MG.json) · [Cu–Mg system page](https://data.orchid-project.org/systems/CU-MG.html) · [Markdown](https://data.orchid-project.org/phases/pages/CU-MG.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Cu–Mg system (7) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BCC_A2](#phase-cu-mg-bcc-a2); _phase:cu-mg:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | not stable in 6 calculated diagram(s) | 0 | 6 | | [C15_LAVES](#phase-cu-mg-c15-laves); _phase:cu-mg:c15-laves_ | Cu2Mg · C15 · cF24 · Fd-3m (227) | tier A: standard phase name | stable in 5 of 5 calculated diagram(s): 300–1073.8 K, x(Mg) 0.3122–0.36157 | 23 | 5 | | [CU2MG_C15](#phase-cu-mg-cu2mg-c15); _phase:cu-mg:cu2mg-c15_ | Cu2Mg · C15 · cF24 · Fd-3m (227) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1063.69 K, x(Mg) 0.33333–0.33333 | 0 | 1 | | [CUMG2_CB](#phase-cu-mg-cumg2-cb); _phase:cu-mg:cumg2-cb_ | CuMg2 · C_b · oF48 · Fddd (70) | tier A: standard phase name | stable in 6 of 6 calculated diagram(s): 300–840.92 K, x(Mg) 0.66648–0.66737 | 22 | 6 | | [FCC_A1](#phase-cu-mg-fcc-a1); _phase:cu-mg:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 6 of 6 calculated diagram(s): 300–1363.35 K, x(Mg) 0–0.07837 | 7 | 6 | | [HCP_A3](#phase-cu-mg-hcp-a3); _phase:cu-mg:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 6 of 6 calculated diagram(s): 300–2499.71 K, x(Mg) 0.99779–1 | 7 | 6 | | [LIQUID](#phase-cu-mg-liquid); _phase:cu-mg:liquid_ | liquid | liquid | stable in 6 of 6 calculated diagram(s): 755.21–2500 K, x(Mg) 0–1 | 41 | 6 | ## BCC_A2 (Cu–Mg) - Id: `phase:cu-mg:bcc-a2`; status `assigned` - Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high - Stability: not stable in 6 calculated diagram(s) - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cu-mg:bcc-a2) Names (7): _corpus: _corpus:phase:cu-mg:bcc-a2 _tdb: _tdb:CuMg-07Zho.tdb:BCC_A2, tdb:CuMg-16Hal.tdb:BCC_A2, tdb:CuMg-91Cou-alt.tdb:BCC_A2, tdb:CuMg-91Cou.tdb:BCC_A2, tdb:CuMg-93Zuo.tdb:BCC_A2, tdb:CuMg-98Lia-LB.tdb:BCC_A2 ### TDB models of BCC_A2 (6): PHASE and CONSTITUENT statements as written [CuMg-07Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-07Zho.tdb): BCC_A2, type code %, sha256 `fce6284b3f435020…` ~~~~text 53: PHASE BCC_A2 % 2 1 3 ! 54: CONST BCC_A2 : CU MG : VA : ! ~~~~ [CuMg-16Hal.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-16Hal.tdb): BCC_A2, type code %, sha256 `724f79dcc02b489a…` ~~~~text 55: PHASE BCC_A2 % 2 1 3 ! 56: CONST BCC_A2 : CU MG : VA : ! ~~~~ [CuMg-91Cou-alt.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou-alt.tdb): BCC_A2, type code %, sha256 `61fc3e264e3d2030…` ~~~~text 39: PHASE BCC_A2 % 2 1 3 ! 40: CONST BCC_A2 : CU MG : VA : ! ~~~~ [CuMg-91Cou.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou.tdb): BCC_A2, type code %, sha256 `d6dcb490dc40d795…` ~~~~text 37: PHASE BCC_A2 % 2 1 3 ! 38: CONST BCC_A2 : CU MG : VA : ! ~~~~ [CuMg-93Zuo.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-93Zuo.tdb): BCC_A2, type code %, sha256 `9cfa764740b47ccf…` ~~~~text 35: PHASE BCC_A2 % 2 1 3 ! 36: CONST BCC_A2 : CU MG : VA : ! ~~~~ [CuMg-98Lia-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-98Lia-LB.tdb): BCC_A2, type code %, sha256 `61a8299cd3c8ef0b…` ~~~~text 34: PHASE BCC_A2 % 2 1 3 ! 35: CONST BCC_A2 : CU MG : VA : ! ~~~~ Example references (5 of 5; assessments first): - [doi:10.1007/s11669-007-9022-0](https://doi.org/10.1007/s11669-007-9022-0) Shihuai Zhou, Yi Wang, Frank G. Shi, Ferdinand Sommer, Long-Qing Chen, Zi-Kui Liu et al., Modeling of Thermodynamic Properties and Phase Equilibria for the Cu-Mg Binary System, J Phs Eqil and Diff 28, 158-166 (2007). _assessment that models this phase_ - [doi:10.1016/j.calphad.2016.03.002](https://doi.org/10.1016/j.calphad.2016.03.002) Bengt Hallstedt, Joachim Gröbner, Milan Hampl, Rainer Schmid-Fetzer, Calorimetric measurements and assessment of the binary Cu–Si and ternary Al–Cu–Si phase diagrams, Calphad 53, 25-38 (2016). _assessment that models this phase_ - [doi:10.1016/S0364-5916(99)00009-7](https://doi.org/10.1016/S0364-5916%2899%2900009-7) P. Liang, H.J. Seifert, H.L. Lukas, G. Ghosh, G. Effenberg, F. Aldinger, Calphad, 22, 527-44 (1998). _assessment that models this phase_ - [doi:10.1515/ijmr-1991-820711](https://doi.org/10.1515/ijmr-1991-820711) C.A. Coughanowr, I. Ansara, R. Luoma, M. Hamalainen, and H.L. Lukas, Assessment of the Cu-Mg System, Z. Metallkd., 1991, 82, p 574-581 _assessment that models this phase_ - [doi:10.1515/ijmr-1993-841002](https://doi.org/10.1515/ijmr-1993-841002) Y. Zuo, Y.A. Chang, Z. Metallkd., 84, 662-67(1993). _assessment that models this phase_ ## C15_LAVES (Cu–Mg) - Id: `phase:cu-mg:c15-laves`; status `assigned` - Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type `st:c15-cu2mg-cf24`; tier A: standard phase name; confidence high - Caveat: partitioned order/disorder model in CuMg-07Zho.tdb also describes the disordered state - Caveat: partitioned order/disorder model in CuMg-16Hal.tdb also describes the disordered state - Caveat: partitioned order/disorder model in CuMg-91Cou.tdb also describes the disordered state - Caveat: partitioned order/disorder model in CuMg-98Lia-LB.tdb also describes the disordered state - Stability: stable in 5 of 5 calculated diagram(s): 300–1073.8 K, x(Mg) 0.3122–0.36157 - Literature: 23 values (20 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cu-mg:c15-laves) Names (7): _corpus: _corpus:phase:cu-mg:c15-laves _paper: _paper:10.1007/s11669-007-9022-0:Cu2Mg-C15 _tdb: _tdb:CuMg-07Zho.tdb:C15_LAVES, tdb:CuMg-16Hal.tdb:C15_LAVES, tdb:CuMg-91Cou-alt.tdb:C15_LAVES, tdb:CuMg-91Cou.tdb:C15_LAVES, tdb:CuMg-98Lia-LB.tdb:C15_LAVES ### TDB models of C15_LAVES (5): PHASE and CONSTITUENT statements as written [CuMg-07Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-07Zho.tdb): C15_LAVES, type code %, sha256 `fce6284b3f435020…` ~~~~text 63: PHASE C15_LAVES % 2 2 1 ! 64: CONST C15_LAVES : CU% MG : CU MG% : ! ~~~~ [CuMg-16Hal.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-16Hal.tdb): C15_LAVES, type code %, sha256 `724f79dcc02b489a…` ~~~~text 65: PHASE C15_LAVES % 2 2 1 ! 66: CONST C15_LAVES : CU% MG : CU MG% : ! ~~~~ [CuMg-91Cou-alt.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou-alt.tdb): C15_LAVES, type code %, sha256 `61fc3e264e3d2030…` ~~~~text 54: PHASE C15_LAVES % 2 2 1 ! 55: CONST C15_LAVES : CU : MG : ! ~~~~ [CuMg-91Cou.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou.tdb): C15_LAVES, type code %, sha256 `d6dcb490dc40d795…` ~~~~text 52: PHASE C15_LAVES % 2 2 1 ! 53: CONST C15_LAVES : CU% MG : CU MG% : ! ~~~~ [CuMg-98Lia-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-98Lia-LB.tdb): C15_LAVES, type code %, sha256 `61a8299cd3c8ef0b…` ~~~~text 49: PHASE C15_LAVES % 2 2 1 ! 50: CONST C15_LAVES : CU% MG : CU MG% : ! ~~~~ Example references (6 of 6; assessments first): - [doi:10.1007/s11669-007-9022-0](https://doi.org/10.1007/s11669-007-9022-0) Shihuai Zhou, Yi Wang, Frank G. Shi, Ferdinand Sommer, Long-Qing Chen, Zi-Kui Liu et al., Modeling of Thermodynamic Properties and Phase Equilibria for the Cu-Mg Binary System, J Phs Eqil and Diff 28, 158-166 (2007). _assessment that models this phase; reports values for this phase_ - [doi:10.1515/ijmr-1991-820711](https://doi.org/10.1515/ijmr-1991-820711) C.A. Coughanowr, I. Ansara, R. Luoma, M. Hamalainen, and H.L. Lukas, Assessment of the Cu-Mg System, Z. Metallkd., 1991, 82, p 574-581 _assessment that models this phase; cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2016.03.002](https://doi.org/10.1016/j.calphad.2016.03.002) Bengt Hallstedt, Joachim Gröbner, Milan Hampl, Rainer Schmid-Fetzer, Calorimetric measurements and assessment of the binary Cu–Si and ternary Al–Cu–Si phase diagrams, Calphad 53, 25-38 (2016). _assessment that models this phase_ - [doi:10.1016/S0364-5916(99)00009-7](https://doi.org/10.1016/S0364-5916%2899%2900009-7) P. Liang, H.J. Seifert, H.L. Lukas, G. Ghosh, G. Effenberg, F. Aldinger, Calphad, 22, 527-44 (1998). _assessment that models this phase_ - [doi:10.1515/ijmr-1978-690209](https://doi.org/10.1515/ijmr-1978-690209) P. Bagnoud and P. Feschotte, Binary Systems Mg-Cu and MgNi, Particularly the Non-Stoichiometry of the MgCu2 and MgNi2 Laves Phases, Z. Metallkd., 1978, 69, p 114-120 _cited as the source of values for this phase_ - [doi:10.1002/zaac.19080570102](https://doi.org/10.1002/zaac.19080570102) R. Sahmen, Über die Legierungen des Kupfers mit Kobalt, Eisen, Mangan und Magnesium, Z. Anorg. Chem. 57, 1-33 (1908). _cited as the source of values for this phase_ ## CU2MG_C15 (Cu–Mg) - Id: `phase:cu-mg:cu2mg-c15`; status `assigned` - Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type `st:c15-cu2mg-cf24`; tier A: standard phase name; confidence high - Stoichiometry: Cu 0.6667, Mg 0.3333 - Stability: stable in 1 of 1 calculated diagram(s): 300–1063.69 K, x(Mg) 0.33333–0.33333 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cu-mg:cu2mg-c15) Names (2): _corpus: _corpus:phase:cu-mg:cu2mg-c15 _tdb: _tdb:CuMg-93Zuo.tdb:CU2MG_C15 ### TDB models of CU2MG_C15 (1): PHASE and CONSTITUENT statements as written [CuMg-93Zuo.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-93Zuo.tdb): CU2MG_C15, type code %, sha256 `9cfa764740b47ccf…` ~~~~text 50: PHASE CU2MG_C15 % 2 2 1 ! 51: CONST CU2MG_C15 : CU : MG : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1515/ijmr-1993-841002](https://doi.org/10.1515/ijmr-1993-841002) Y. Zuo, Y.A. Chang, Z. Metallkd., 84, 662-67(1993). _assessment that models this phase_ ## CUMG2_CB (Cu–Mg) - Id: `phase:cu-mg:cumg2-cb`; status `assigned` - Structure: CuMg2 · C_b · oF48 · Fddd (70); type `st:c-b-cumg2-of48`; tier A: standard phase name; confidence high - Caveat: partitioned order/disorder model in CuMg-07Zho.tdb also describes the disordered state - Stability: stable in 6 of 6 calculated diagram(s): 300–840.92 K, x(Mg) 0.66648–0.66737 - Literature: 22 values (18 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cu-mg:cumg2-cb) Names (8): _corpus: _corpus:phase:cu-mg:cumg2-cb _paper: _paper:10.1007/s11669-007-9022-0:CuMg2-Cb _tdb: _tdb:CuMg-07Zho.tdb:CUMG2_CB, tdb:CuMg-16Hal.tdb:CUMG2_CB, tdb:CuMg-91Cou-alt.tdb:CUMG2_CB, tdb:CuMg-91Cou.tdb:CUMG2_CB, tdb:CuMg-93Zuo.tdb:CUMG2_CB, tdb:CuMg-98Lia-LB.tdb:CUMG2_CB ### TDB models of CUMG2_CB (6): PHASE and CONSTITUENT statements as written [CuMg-07Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-07Zho.tdb): CUMG2_CB, type code %, sha256 `fce6284b3f435020…` ~~~~text 68: PHASE CUMG2_CB % 2 1 2 ! 69: CONST CUMG2_CB : CU% MG : CU MG% : ! ~~~~ [CuMg-16Hal.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-16Hal.tdb): CUMG2_CB, type code %, sha256 `724f79dcc02b489a…` ~~~~text 70: PHASE CUMG2_CB % 2 1 2 ! 71: CONST CUMG2_CB : CU : MG : ! ~~~~ [CuMg-91Cou-alt.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou-alt.tdb): CUMG2_CB, type code %, sha256 `61fc3e264e3d2030…` ~~~~text 49: PHASE CUMG2_CB % 2 1 2 ! 50: CONST CUMG2_CB : CU : MG : ! ~~~~ [CuMg-91Cou.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou.tdb): CUMG2_CB, type code %, sha256 `d6dcb490dc40d795…` ~~~~text 47: PHASE CUMG2_CB % 2 1 2 ! 48: CONST CUMG2_CB : CU : MG : ! ~~~~ [CuMg-93Zuo.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-93Zuo.tdb): CUMG2_CB, type code %, sha256 `9cfa764740b47ccf…` ~~~~text 45: PHASE CUMG2_CB % 2 1 2 ! 46: CONST CUMG2_CB : CU : MG : ! ~~~~ [CuMg-98Lia-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-98Lia-LB.tdb): CUMG2_CB, type code %, sha256 `61a8299cd3c8ef0b…` ~~~~text 44: PHASE CUMG2_CB % 2 1 2 ! 45: CONST CUMG2_CB : CU : MG : ! ~~~~ Example references (7 of 7; assessments first): - [doi:10.1007/s11669-007-9022-0](https://doi.org/10.1007/s11669-007-9022-0) Shihuai Zhou, Yi Wang, Frank G. Shi, Ferdinand Sommer, Long-Qing Chen, Zi-Kui Liu et al., Modeling of Thermodynamic Properties and Phase Equilibria for the Cu-Mg Binary System, J Phs Eqil and Diff 28, 158-166 (2007). _assessment that models this phase; reports values for this phase_ - [doi:10.1515/ijmr-1991-820711](https://doi.org/10.1515/ijmr-1991-820711) C.A. Coughanowr, I. Ansara, R. Luoma, M. Hamalainen, and H.L. Lukas, Assessment of the Cu-Mg System, Z. Metallkd., 1991, 82, p 574-581 _assessment that models this phase; cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2016.03.002](https://doi.org/10.1016/j.calphad.2016.03.002) Bengt Hallstedt, Joachim Gröbner, Milan Hampl, Rainer Schmid-Fetzer, Calorimetric measurements and assessment of the binary Cu–Si and ternary Al–Cu–Si phase diagrams, Calphad 53, 25-38 (2016). _assessment that models this phase_ - [doi:10.1016/S0364-5916(99)00009-7](https://doi.org/10.1016/S0364-5916%2899%2900009-7) P. Liang, H.J. Seifert, H.L. Lukas, G. Ghosh, G. Effenberg, F. Aldinger, Calphad, 22, 527-44 (1998). _assessment that models this phase_ - [doi:10.1515/ijmr-1993-841002](https://doi.org/10.1515/ijmr-1993-841002) Y. Zuo, Y.A. Chang, Z. Metallkd., 84, 662-67(1993). _assessment that models this phase_ - [doi:10.1002/zaac.19080570102](https://doi.org/10.1002/zaac.19080570102) R. Sahmen, Über die Legierungen des Kupfers mit Kobalt, Eisen, Mangan und Magnesium, Z. Anorg. Chem. 57, 1-33 (1908). _cited as the source of values for this phase_ - [doi:10.1515/ijmr-1978-690209](https://doi.org/10.1515/ijmr-1978-690209) P. Bagnoud and P. Feschotte, Binary Systems Mg-Cu and MgNi, Particularly the Non-Stoichiometry of the MgCu2 and MgNi2 Laves Phases, Z. Metallkd., 1978, 69, p 114-120 _cited as the source of values for this phase_ ## FCC_A1 (Cu–Mg) - Id: `phase:cu-mg: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 6 of 6 calculated diagram(s): 300–1363.35 K, x(Mg) 0–0.07837 - Literature: 7 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cu-mg:fcc-a1) Names (8): _corpus: _corpus:phase:cu-mg:fcc-a1 _paper: _paper:10.1007/s11669-007-9022-0:fcc _tdb: _tdb:CuMg-07Zho.tdb:FCC_A1, tdb:CuMg-16Hal.tdb:FCC_A1, tdb:CuMg-91Cou-alt.tdb:FCC_A1, tdb:CuMg-91Cou.tdb:FCC_A1, tdb:CuMg-93Zuo.tdb:FCC_A1, tdb:CuMg-98Lia-LB.tdb:FCC_A1 ### TDB models of FCC_A1 (6): PHASE and CONSTITUENT statements as written [CuMg-07Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-07Zho.tdb): FCC_A1, type code %, sha256 `fce6284b3f435020…` ~~~~text 48: PHASE FCC_A1 % 2 1 1 ! 49: CONST FCC_A1 : CU% MG : VA : ! ~~~~ [CuMg-16Hal.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-16Hal.tdb): FCC_A1, type code %, sha256 `724f79dcc02b489a…` ~~~~text 50: PHASE FCC_A1 % 2 1 1 ! 51: CONST FCC_A1 : CU% MG : VA : ! ~~~~ [CuMg-91Cou-alt.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou-alt.tdb): FCC_A1, type code %, sha256 `61fc3e264e3d2030…` ~~~~text 34: PHASE FCC_A1 % 2 1 1 ! 35: CONST FCC_A1 : CU% MG : VA : ! ~~~~ [CuMg-91Cou.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou.tdb): FCC_A1, type code %, sha256 `d6dcb490dc40d795…` ~~~~text 32: PHASE FCC_A1 % 2 1 1 ! 33: CONST FCC_A1 : CU% MG : VA : ! ~~~~ [CuMg-93Zuo.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-93Zuo.tdb): FCC_A1, type code %, sha256 `9cfa764740b47ccf…` ~~~~text 30: PHASE FCC_A1 % 2 1 1 ! 31: CONST FCC_A1 : CU% MG : VA : ! ~~~~ [CuMg-98Lia-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-98Lia-LB.tdb): FCC_A1, type code %, sha256 `61a8299cd3c8ef0b…` ~~~~text 29: PHASE FCC_A1 % 2 1 1 ! 30: CONST FCC_A1 : CU% MG : VA : ! ~~~~ Example references (6 of 6; assessments first): - [doi:10.1007/s11669-007-9022-0](https://doi.org/10.1007/s11669-007-9022-0) Shihuai Zhou, Yi Wang, Frank G. Shi, Ferdinand Sommer, Long-Qing Chen, Zi-Kui Liu et al., Modeling of Thermodynamic Properties and Phase Equilibria for the Cu-Mg Binary System, J Phs Eqil and Diff 28, 158-166 (2007). _assessment that models this phase; reports values for this phase_ - [doi:10.1515/ijmr-1991-820711](https://doi.org/10.1515/ijmr-1991-820711) C.A. Coughanowr, I. Ansara, R. Luoma, M. Hamalainen, and H.L. Lukas, Assessment of the Cu-Mg System, Z. Metallkd., 1991, 82, p 574-581 _assessment that models this phase; cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2016.03.002](https://doi.org/10.1016/j.calphad.2016.03.002) Bengt Hallstedt, Joachim Gröbner, Milan Hampl, Rainer Schmid-Fetzer, Calorimetric measurements and assessment of the binary Cu–Si and ternary Al–Cu–Si phase diagrams, Calphad 53, 25-38 (2016). _assessment that models this phase_ - [doi:10.1016/S0364-5916(99)00009-7](https://doi.org/10.1016/S0364-5916%2899%2900009-7) P. Liang, H.J. Seifert, H.L. Lukas, G. Ghosh, G. Effenberg, F. Aldinger, Calphad, 22, 527-44 (1998). _assessment that models this phase_ - [doi:10.1515/ijmr-1993-841002](https://doi.org/10.1515/ijmr-1993-841002) Y. Zuo, Y.A. Chang, Z. Metallkd., 84, 662-67(1993). _assessment that models this phase_ - [doi:10.1515/ijmr-1978-690209](https://doi.org/10.1515/ijmr-1978-690209) P. Bagnoud and P. Feschotte, Binary Systems Mg-Cu and MgNi, Particularly the Non-Stoichiometry of the MgCu2 and MgNi2 Laves Phases, Z. Metallkd., 1978, 69, p 114-120 _cited as the source of values for this phase_ ## HCP_A3 (Cu–Mg) - Id: `phase:cu-mg: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 6 of 6 calculated diagram(s): 300–2499.71 K, x(Mg) 0.99779–1 - Literature: 7 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cu-mg:hcp-a3) Names (8): _corpus: _corpus:phase:cu-mg:hcp-a3 _paper: _paper:10.1007/s11669-007-9022-0:hcp _tdb: _tdb:CuMg-07Zho.tdb:HCP_A3, tdb:CuMg-16Hal.tdb:HCP_A3, tdb:CuMg-91Cou-alt.tdb:HCP_A3, tdb:CuMg-91Cou.tdb:HCP_A3, tdb:CuMg-93Zuo.tdb:HCP_A3, tdb:CuMg-98Lia-LB.tdb:HCP_A3 ### TDB models of HCP_A3 (6): PHASE and CONSTITUENT statements as written [CuMg-07Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-07Zho.tdb): HCP_A3, type code %, sha256 `fce6284b3f435020…` ~~~~text 58: PHASE HCP_A3 % 2 1 0.5 ! 59: CONST HCP_A3 : CU MG% : VA: ! ~~~~ [CuMg-16Hal.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-16Hal.tdb): HCP_A3, type code %, sha256 `724f79dcc02b489a…` ~~~~text 60: PHASE HCP_A3 % 2 1 0.5 ! 61: CONST HCP_A3 : CU MG% : VA: ! ~~~~ [CuMg-91Cou-alt.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou-alt.tdb): HCP_A3, type code %, sha256 `61fc3e264e3d2030…` ~~~~text 44: PHASE HCP_A3 % 2 1 0.5 ! 45: CONST HCP_A3 : CU MG% : VA: ! ~~~~ [CuMg-91Cou.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou.tdb): HCP_A3, type code %, sha256 `d6dcb490dc40d795…` ~~~~text 42: PHASE HCP_A3 % 2 1 0.5 ! 43: CONST HCP_A3 : CU MG% : VA: ! ~~~~ [CuMg-93Zuo.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-93Zuo.tdb): HCP_A3, type code %, sha256 `9cfa764740b47ccf…` ~~~~text 40: PHASE HCP_A3 % 2 1 0.5 ! 41: CONST HCP_A3 : CU MG% : VA: ! ~~~~ [CuMg-98Lia-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-98Lia-LB.tdb): HCP_A3, type code %, sha256 `61a8299cd3c8ef0b…` ~~~~text 39: PHASE HCP_A3 % 2 1 0.5 ! 40: CONST HCP_A3 : CU MG% : VA: ! ~~~~ Example references (6 of 6; assessments first): - [doi:10.1007/s11669-007-9022-0](https://doi.org/10.1007/s11669-007-9022-0) Shihuai Zhou, Yi Wang, Frank G. Shi, Ferdinand Sommer, Long-Qing Chen, Zi-Kui Liu et al., Modeling of Thermodynamic Properties and Phase Equilibria for the Cu-Mg Binary System, J Phs Eqil and Diff 28, 158-166 (2007). _assessment that models this phase; reports values for this phase_ - [doi:10.1515/ijmr-1991-820711](https://doi.org/10.1515/ijmr-1991-820711) C.A. Coughanowr, I. Ansara, R. Luoma, M. Hamalainen, and H.L. Lukas, Assessment of the Cu-Mg System, Z. Metallkd., 1991, 82, p 574-581 _assessment that models this phase; cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2016.03.002](https://doi.org/10.1016/j.calphad.2016.03.002) Bengt Hallstedt, Joachim Gröbner, Milan Hampl, Rainer Schmid-Fetzer, Calorimetric measurements and assessment of the binary Cu–Si and ternary Al–Cu–Si phase diagrams, Calphad 53, 25-38 (2016). _assessment that models this phase_ - [doi:10.1016/S0364-5916(99)00009-7](https://doi.org/10.1016/S0364-5916%2899%2900009-7) P. Liang, H.J. Seifert, H.L. Lukas, G. Ghosh, G. Effenberg, F. Aldinger, Calphad, 22, 527-44 (1998). _assessment that models this phase_ - [doi:10.1515/ijmr-1993-841002](https://doi.org/10.1515/ijmr-1993-841002) Y. Zuo, Y.A. Chang, Z. Metallkd., 84, 662-67(1993). _assessment that models this phase_ - [doi:10.1002/zaac.19080570102](https://doi.org/10.1002/zaac.19080570102) R. Sahmen, Über die Legierungen des Kupfers mit Kobalt, Eisen, Mangan und Magnesium, Z. Anorg. Chem. 57, 1-33 (1908). _cited as the source of values for this phase_ ## LIQUID (Cu–Mg) - Id: `phase:cu-mg:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 6 of 6 calculated diagram(s): 755.21–2500 K, x(Mg) 0–1 - Literature: 41 values (36 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:cu-mg:liquid) Names (9): _corpus: _corpus:phase:cu-mg:liquid _paper: _paper:10.1007/s11669-007-9022-0:L, paper:sha256-85fd53a1a176b694:Liquid _tdb: _tdb:CuMg-07Zho.tdb:LIQUID, tdb:CuMg-16Hal.tdb:LIQUID, tdb:CuMg-91Cou-alt.tdb:LIQUID, tdb:CuMg-91Cou.tdb:LIQUID, tdb:CuMg-93Zuo.tdb:LIQUID, tdb:CuMg-98Lia-LB.tdb:LIQUID ### TDB models of LIQUID (6): PHASE and CONSTITUENT statements as written [CuMg-07Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-07Zho.tdb): LIQUID, type code %, sha256 `fce6284b3f435020…` ~~~~text 43: PHASE LIQUID:L % 1 1 ! 44: CONST LIQUID:L : CU CU2MG CUMG2 MG : ! ~~~~ [CuMg-16Hal.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-16Hal.tdb): LIQUID, type code %, sha256 `724f79dcc02b489a…` ~~~~text 45: PHASE LIQUID:L % 1 1 ! 46: CONST LIQUID:L : CU MG : ! ~~~~ [CuMg-91Cou-alt.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou-alt.tdb): LIQUID, type code %, sha256 `61fc3e264e3d2030…` ~~~~text 29: PHASE LIQUID:L % 1 1 ! 30: CONST LIQUID:L : CU MG : ! ~~~~ [CuMg-91Cou.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-91Cou.tdb): LIQUID, type code %, sha256 `d6dcb490dc40d795…` ~~~~text 27: PHASE LIQUID:L % 1 1 ! 28: CONST LIQUID:L : CU MG : ! ~~~~ [CuMg-93Zuo.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-93Zuo.tdb): LIQUID, type code %, sha256 `9cfa764740b47ccf…` ~~~~text 25: PHASE LIQUID:L % 1 1 ! 26: CONST LIQUID:L : CU MG : ! ~~~~ [CuMg-98Lia-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/CuMg-98Lia-LB.tdb): LIQUID, type code %, sha256 `61a8299cd3c8ef0b…` ~~~~text 24: PHASE LIQUID:L % 1 1 ! 25: CONST LIQUID:L : CU MG : ! ~~~~ Example references (7 of 7; assessments first): - [doi:10.1007/s11669-007-9022-0](https://doi.org/10.1007/s11669-007-9022-0) Shihuai Zhou, Yi Wang, Frank G. Shi, Ferdinand Sommer, Long-Qing Chen, Zi-Kui Liu et al., Modeling of Thermodynamic Properties and Phase Equilibria for the Cu-Mg Binary System, J Phs Eqil and Diff 28, 158-166 (2007). _assessment that models this phase; reports values for this phase_ - [doi:10.1515/ijmr-1991-820711](https://doi.org/10.1515/ijmr-1991-820711) C.A. Coughanowr, I. Ansara, R. Luoma, M. Hamalainen, and H.L. Lukas, Assessment of the Cu-Mg System, Z. Metallkd., 1991, 82, p 574-581 _assessment that models this phase; cited as the source of values for this phase_ - [doi:10.1016/j.calphad.2016.03.002](https://doi.org/10.1016/j.calphad.2016.03.002) Bengt Hallstedt, Joachim Gröbner, Milan Hampl, Rainer Schmid-Fetzer, Calorimetric measurements and assessment of the binary Cu–Si and ternary Al–Cu–Si phase diagrams, Calphad 53, 25-38 (2016). _assessment that models this phase_ - [doi:10.1016/S0364-5916(99)00009-7](https://doi.org/10.1016/S0364-5916%2899%2900009-7) P. Liang, H.J. Seifert, H.L. Lukas, G. Ghosh, G. Effenberg, F. Aldinger, Calphad, 22, 527-44 (1998). _assessment that models this phase_ - [doi:10.1515/ijmr-1993-841002](https://doi.org/10.1515/ijmr-1993-841002) Y. Zuo, Y.A. Chang, Z. Metallkd., 84, 662-67(1993). _assessment that models this phase_ - [doi:10.1515/ijmr-1978-690209](https://doi.org/10.1515/ijmr-1978-690209) P. Bagnoud and P. Feschotte, Binary Systems Mg-Cu and MgNi, Particularly the Non-Stoichiometry of the MgCu2 and MgNi2 Laves Phases, Z. Metallkd., 1978, 69, p 114-120 _cited as the source of values for this phase_ - [doi:10.1002/zaac.19080570102](https://doi.org/10.1002/zaac.19080570102) R. Sahmen, Über die Legierungen des Kupfers mit Kobalt, Eisen, Mangan und Magnesium, Z. Anorg. Chem. 57, 1-33 (1908). _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). https://doi.org/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). https://doi.org/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. ```bibtex @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} } ``` --- Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).