Cu–Mg system

36 accepted literature values from 2 paper(s) (experimental 16, model 20); 6 calculated phase diagram(s). 5 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (7) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	16
model	20

Accepted values by property group
Property group	Values
invariant reaction	22
phase transition	14

Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
CuMg-07Zho.tdb	S.H. Zhou, Y. Wang, F.G. Shi, F. Sommer, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, J. Phase Equilib. Diffus., 28, 158-66(2007). doi:10.1007/s11669-007-9022-0	`fce6284b3f4350202cf02ef42a9108f6bd1024419b01d8a7658005245cf8e475`	viewer · TDB · JSON
CuMg-16Hal.tdb	B. Hallstedt, unpublished, 2016. doi:10.1016/j.calphad.2016.03.002	`724f79dcc02b489a88168025ee3d808b2af80ef4a01f9f359593b472da3bb90c`	viewer · TDB · JSON
CuMg-91Cou-alt.tdb	C.A. Coughanowr, I. Ansara, R. Luoma, M. Hamalainen, H.L. Lukas, Z. Metallkd., 82, 574-81(1991). doi:10.1515/ijmr-1991-820711	`61fc3e264e3d20305523d55d9af0896107fb52a75e39c26c9245ed0fbb96cf68`	viewer · TDB · JSON
CuMg-91Cou.tdb	C.A. Coughanowr, I. Ansara, R. Luoma, M. Hamalainen, H.L. Lukas, Z. Metallkd., 82, 574-81(1991). doi:10.1515/ijmr-1991-820711	`d6dcb490dc40d7953b61834ed4aed0eaf3fb6d4db6996fdb7969d24263f775f0`	viewer · TDB · JSON
CuMg-93Zuo.tdb	Y. Zuo, Y.A. Chang, Z. Metallkd., 84, 662-67(1993). doi:10.1515/ijmr-1993-841002	`9cfa764740b47ccf4bacc3e17bad13be374af71ca009052eac7da983415b8d3a`	viewer · TDB · JSON
CuMg-98Lia-LB.tdb	P. Liang, H.J. Seifert, H.L. Lukas, G. Ghosh, G. Effenberg, F. Aldinger, Calphad, 22, 527-44 (1998). doi:10.1016/S0364-5916(99)00009-7	`61a8299cd3c8ef0b975735698cef2a56a26c3641bac0dc8907367c66d433d867`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CuMg-07Zho.tdb	998.84	FCC_A1 (x(Mg) 0.07464) + LIQUID (x(Mg) 0.21332) + C15_LAVES (x(Mg) 0.31484)
CuMg-07Zho.tdb	826.55	C15_LAVES (x(Mg) 0.36157) + LIQUID (x(Mg) 0.59887) + CUMG2_CB (x(Mg) 0.66648)
CuMg-07Zho.tdb	757.35	CUMG2_CB (x(Mg) 0.66737) + LIQUID (x(Mg) 0.83639) + HCP_A3 (x(Mg) 0.99998)
CuMg-16Hal.tdb	998.35	FCC_A1 (x(Mg) 0.06966) + LIQUID (x(Mg) 0.20949) + C15_LAVES (x(Mg) 0.31223)
CuMg-16Hal.tdb	825.16	C15_LAVES (x(Mg) 0.35689) + LIQUID (x(Mg) 0.59475) + CUMG2_CB (x(Mg) 0.66667)
CuMg-16Hal.tdb	758.06	CUMG2_CB (x(Mg) 0.66667) + LIQUID (x(Mg) 0.8372) + HCP_A3 (x(Mg) 0.99951)
CuMg-91Cou-alt.tdb	998.35	FCC_A1 (x(Mg) 0.07046) + LIQUID (x(Mg) 0.21356) + C15_LAVES (x(Mg) 0.33333)
CuMg-91Cou-alt.tdb	998.35	FCC_A1 (x(Mg) 0.07039) + LIQUID (x(Mg) 0.21346) + C15_LAVES (x(Mg) 0.33333)
CuMg-91Cou-alt.tdb	825.51	C15_LAVES (x(Mg) 0.33333) + LIQUID (x(Mg) 0.5951) + CUMG2_CB (x(Mg) 0.66667)
CuMg-91Cou-alt.tdb	825.5	C15_LAVES (x(Mg) 0.33333) + LIQUID (x(Mg) 0.59555) + CUMG2_CB (x(Mg) 0.66667)
CuMg-91Cou-alt.tdb	759.5	CUMG2_CB (x(Mg) 0.66667) + LIQUID (x(Mg) 0.8397) + HCP_A3 (x(Mg) 1)
CuMg-91Cou-alt.tdb	759.5	CUMG2_CB (x(Mg) 0.66667) + LIQUID (x(Mg) 0.83973) + HCP_A3 (x(Mg) 1)
CuMg-91Cou.tdb	998.46	FCC_A1 (x(Mg) 0.06938) + LIQUID (x(Mg) 0.2093) + C15_LAVES (x(Mg) 0.3128)
CuMg-91Cou.tdb	825.42	C15_LAVES (x(Mg) 0.35647) + LIQUID (x(Mg) 0.5948) + CUMG2_CB (x(Mg) 0.66667)
CuMg-91Cou.tdb	759.56	CUMG2_CB (x(Mg) 0.66667) + LIQUID (x(Mg) 0.83858) + HCP_A3 (x(Mg) 1)
CuMg-91Cou.tdb	759.56	CUMG2_CB (x(Mg) 0.66667) + LIQUID (x(Mg) 0.83862) + HCP_A3 (x(Mg) 1)
CuMg-93Zuo.tdb	994.18	FCC_A1 (x(Mg) 0.07837) + LIQUID (x(Mg) 0.21684) + CU2MG_C15 (x(Mg) 0.33333)
CuMg-93Zuo.tdb	994.18	FCC_A1 (x(Mg) 0.07835) + LIQUID (x(Mg) 0.21682) + CU2MG_C15 (x(Mg) 0.33333)
CuMg-93Zuo.tdb	821.77	CU2MG_C15 (x(Mg) 0.33333) + LIQUID (x(Mg) 0.58842) + CUMG2_CB (x(Mg) 0.66667)
CuMg-93Zuo.tdb	821.77	CU2MG_C15 (x(Mg) 0.33333) + LIQUID (x(Mg) 0.58832) + CUMG2_CB (x(Mg) 0.66667)
CuMg-93Zuo.tdb	755.21	CUMG2_CB (x(Mg) 0.66667) + LIQUID (x(Mg) 0.8397) + HCP_A3 (x(Mg) 0.99779)
CuMg-93Zuo.tdb	755.21	CUMG2_CB (x(Mg) 0.66667) + LIQUID (x(Mg) 0.83988) + HCP_A3 (x(Mg) 0.9978)
CuMg-98Lia-LB.tdb	998.63	FCC_A1 (x(Mg) 0.06955) + LIQUID (x(Mg) 0.20935) + C15_LAVES (x(Mg) 0.3122)
CuMg-98Lia-LB.tdb	825.48	C15_LAVES (x(Mg) 0.35692) + LIQUID (x(Mg) 0.59485) + CUMG2_CB (x(Mg) 0.66667)
CuMg-98Lia-LB.tdb	759.71	CUMG2_CB (x(Mg) 0.66667) + LIQUID (x(Mg) 0.83847) + HCP_A3 (x(Mg) 0.99951)
CuMg-98Lia-LB.tdb	759.71	CUMG2_CB (x(Mg) 0.66667) + LIQUID (x(Mg) 0.83851) + HCP_A3 (x(Mg) 0.99951)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CuMg-07Zho · CALPHAD hull CuMg-91Cou-alt · CALPHAD hull CuMg-91Cou · CALPHAD hull CuMg-93Zuo · CALPHAD hull CuMg-98Lia-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Cu–Mg system (22)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
998.8	eutectic: Liq -> fcc + Cu2Mg-C15	L: Mg 0.213; fcc: Mg 0.074; Cu2Mg-C15: Mg 0.314	model	[1] Zhou 2007	Table 5, p. 6, row 13 report
998.6	eutectic: Liquid -> fcc-A1 + Laves-C15	Liquid: Mg 0.209; fcc-A1: Mg 0.069; Laves-C15: Mg 0.313	model	[2] (ed.) 1998	Table I, p. 190, row 1 report
998.3	eutectic: Liq -> fcc + Cu2Mg-C15	L: Mg 0.214; fcc: Mg 0.075; Cu2Mg-C15: Mg 0.316	model	[1] Zhou 2007 cites Zou 1993	Table 5, p. 6, row 15 report
998	eutectic: Liq -> fcc + Cu2Mg-C15	L: Mg 0.209; fcc: Mg 0.069; Cu2Mg-C15: Mg 0.313	model	[1] Zhou 2007 cites Coughanowr 1991 doi	Table 5, p. 6, row 14 report
998	eutectic: Liq -> fcc + Cu2Mg-C15	L: Mg 0.23	experimental	[1] Zhou 2007 cites Urazova 1907	Table 5, p. 6, row 17 report
998	eutectic: Liq -> fcc + Cu2Mg-C15	fcc: Mg 0.069; Cu2Mg-C15: Mg 0.31	experimental	[1] Zhou 2007 cites Bagnoud 1978 doi	Table 5, p. 6, row 18 report
995	eutectic: Liq -> fcc + Cu2Mg-C15		experimental	[1] Zhou 2007 cites Jones 1931	Table 5, p. 6, row 16 report
828	eutectic: Liq -> CuMg2-Cb + Cu2Mg-C15	L: Mg 0.585; CuMg2-Cb: Mg 0.667; Cu2Mg-C15: Mg 0.353	experimental	[1] Zhou 2007 cites Urazova 1907	Table 5, p. 6, row 22 report
828	eutectic: Liq -> CuMg2-Cb + Cu2Mg-C15	CuMg2-Cb: Mg 0.666667	experimental	[1] Zhou 2007 cites Sahmen 1908 doi	Table 5, p. 6, row 23 report
826.5	eutectic: Liq -> CuMg2-Cb + Cu2Mg-C15	L: Mg 0.594; CuMg2-Cb: Mg 0.667; Cu2Mg-C15: Mg 0.361	model	[1] Zhou 2007	Table 5, p. 6, row 19 report
825.5	eutectic: Liq -> CuMg2-Cb + Cu2Mg-C15	L: Mg 0.595; CuMg2-Cb: Mg 0.667; Cu2Mg-C15: Mg 0.356	model	[1] Zhou 2007 cites Coughanowr 1991 doi	Table 5, p. 6, row 20 report
825.5	eutectic: Liquid -> Laves-C15 + CuMg2	Liquid: Mg 0.595; Laves-C15: Mg 0.356; CuMg2: Mg 0.667	model	[2] (ed.) 1998	Table I, p. 190, row 2 report
825.2	eutectic: Liq -> CuMg2-Cb + Cu2Mg-C15	L: Mg 0.588; CuMg2-Cb: Mg 0.667; Cu2Mg-C15: Mg 0.359	model	[1] Zhou 2007 cites Zou 1993	Table 5, p. 6, row 21 report
825	eutectic: Liq -> CuMg2-Cb + Cu2Mg-C15	CuMg2-Cb: Mg 0.666667	experimental	[1] Zhou 2007 cites Jones 1931	Table 5, p. 6, row 24 report
825	eutectic: Liq -> CuMg2-Cb + Cu2Mg-C15	CuMg2-Cb: Mg 0.666667	experimental	[1] Zhou 2007 cites Bagnoud 1978 doi	Table 5, p. 6, row 25 report
759.7	eutectic: Liquid -> CuMg2 + hcp-A3	Liquid: Mg 0.839; CuMg2: Mg 0.667; hcp-A3: Mg 1	model	[2] (ed.) 1998	Table I, p. 190, row 3 report
759	eutectic: Liq -> hcp + CuMg2-Cb	L: Mg 0.839; hcp: Mg 1; CuMg2-Cb: Mg 0.667	model	[1] Zhou 2007 cites Coughanowr 1991 doi	Table 5, p. 6, row 27 report
758	eutectic: Liq -> hcp + CuMg2-Cb	L: Mg 0.841; hcp: Mg 1; CuMg2-Cb: Mg 0.667	model	[1] Zhou 2007 cites Zou 1993	Table 5, p. 6, row 28 report
758	eutectic: Liq -> hcp + CuMg2-Cb	L: Mg 0.855; CuMg2-Cb: Mg 0.666667	experimental	[1] Zhou 2007 cites Sahmen 1908 doi	Table 5, p. 6, row 30 report
758	eutectic: Liq -> hcp + CuMg2-Cb	L: Mg 0.855; hcp: Mg 1; CuMg2-Cb: Mg 0.667	experimental	[1] Zhou 2007 cites Jones 1931	Table 5, p. 6, row 31 report
757.3	eutectic: Liq -> hcp + CuMg2-Cb	L: Mg 0.838; hcp: Mg 1; CuMg2-Cb: Mg 0.667	model	[1] Zhou 2007	Table 5, p. 6, row 26 report
753	eutectic: Liq -> hcp + CuMg2-Cb	CuMg2-Cb: Mg 0.666667	experimental	[1] Zhou 2007 cites Urazova 1907	Table 5, p. 6, row 29 report

Other properties

Phase transition (14)

Phase transition, Cu–Mg system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	840.5 K	840.5	Liq -> CuMg2-Cb L: Mg 0.667; CuMg2-Cb: Mg 0.667	model	[1] Zhou 2007	Table 5, p. 6, row 8 report
Phase transition	841 K	841	Liq -> CuMg2-Cb L: Mg 0.667; CuMg2-Cb: Mg 0.667	experimental	[1] Zhou 2007 cites Bagnoud 1978 doi	Table 5, p. 6, row 12 report
Phase transition	841 K	841	Liq -> CuMg2-Cb L: Mg 0.666667; CuMg2-Cb: Mg 0.666667	experimental	[1] Zhou 2007 cites Jones 1931	Table 5, p. 6, row 11 report
Phase transition	841 K	841	Liq -> CuMg2-Cb L: Mg 0.667; CuMg2-Cb: Mg 0.667	model	[1] Zhou 2007 cites Zou 1993	Table 5, p. 6, row 10 report
Phase transition	841 K	841	Liq -> CuMg2-Cb L: Mg 0.667; CuMg2-Cb: Mg 0.667	model	[1] Zhou 2007 cites Coughanowr 1991 doi	Table 5, p. 6, row 9 report
Phase transition	841 K	841	congruent melting: CuMg2 -> Liquid CuMg2: Mg 0.666; Liquid: Mg 0.666	model	[2] (ed.) 1998	Table I, p. 190, row 4 report
Phase transition	1063 K	1063	Liq -> Cu2Mg-C15	experimental	[1] Zhou 2007 cites Urazova 1907	Table 5, p. 6, row 4 report
Phase transition	1066 K	1066	Liq -> Cu2Mg-C15 L: Mg 0.333; Cu2Mg-C15: Mg 0.333	experimental	[1] Zhou 2007 cites Bagnoud 1978 doi	Table 5, p. 6, row 7 report
Phase transition	1066.2 K	1066.2	Liq -> Cu2Mg-C15 L: Mg 0.333; Cu2Mg-C15: Mg 0.333	model	[1] Zhou 2007 cites Zou 1993	Table 5, p. 6, row 3 report
Phase transition	1066.3 K	1066.3	Liq -> Cu2Mg-C15 L: Mg 0.333; Cu2Mg-C15: Mg 0.333	model	[1] Zhou 2007	Table 5, p. 6, row 1 report
Phase transition	1070 K	1070	Liq -> Cu2Mg-C15	experimental	[1] Zhou 2007 cites Sahmen 1908 doi	Table 5, p. 6, row 5 report
Phase transition	1073 K	1073	Liq -> Cu2Mg-C15 L: Mg 0.333; Cu2Mg-C15: Mg 0.333	model	[1] Zhou 2007 cites Coughanowr 1991 doi	Table 5, p. 6, row 2 report
Phase transition	1073.5 K	1073.5	congruent melting: Laves-C15 -> Liquid Laves-C15: Mg 0.333; Liquid: Mg 0.333	model	[2] (ed.) 1998	Table I, p. 190, row 5 report
Phase transition	1092 K	1092	Liq -> Cu2Mg-C15	experimental	[1] Zhou 2007 cites Jones 1931	Table 5, p. 6, row 6 report

Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

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). doi:10.1007/s11669-007-9022-0
I. Ansara, A. T. Dinsdale, M. H. Rand (eds.), COST 507: Thermochemical database for light metal alloys, Volume 2, EUR 18499 EN, Office for Official Publications of the European Communities, Luxembourg (1998), ISBN 92-828-3902-8.

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735859
R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735891
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 the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); 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). 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_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@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}
}