Mg–Sr system

39 accepted literature values from 1 paper(s) (experimental 18, model 7, unspecified 14); 2 calculated phase diagram(s). 1 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 (8) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	18
model	7
unspecified	14

Accepted values by property group
Property group	Values
invariant reaction	24
formation	6
crystal structure	9

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
MgSr-06Zho.tdb	Y. Zhong, J.O. Sofo, A.A. Luo, Z.-K. Liu, J. Alloys Compd., 421, 172-78(2006). doi:10.1016/j.jallcom.2005.09.076	`80a83605604288d13232fc86b63a3c161f03dbfc5e5bc79ad741d3dd864be6f1`	viewer · TDB · JSON
MgSr-07Alj.tdb	M. Aljarrah, U. Aghaulor, M. Medraj, Intermetallics, 15, 93-97(2007). doi:10.1016/j.intermet.2006.03.011	`f812ec503d9305231040d7e7cde473f4005f53d23f0b7e8c2af0cfd6788099e9`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
MgSr-06Zho.tdb	875.94	LIQUID (x(Sr) 0.19234) + MG23SR6_D8A (x(Sr) 0.2069) + MG2SR_C14 (x(Sr) 0.32851)
MgSr-06Zho.tdb	875.94	LIQUID (x(Sr) 0.19208) + MG23SR6_D8A (x(Sr) 0.2069) + MG2SR_C14 (x(Sr) 0.3285)
MgSr-06Zho.tdb	871.93	LIQUID (x(Sr) 0.17374) + MG38SR9 (x(Sr) 0.19149) + MG23SR6_D8A (x(Sr) 0.2069)
MgSr-06Zho.tdb	871.93	LIQUID (x(Sr) 0.17336) + MG38SR9 (x(Sr) 0.19149) + MG23SR6_D8A (x(Sr) 0.2069)
MgSr-06Zho.tdb	871.93	LIQUID (x(Sr) 0.17403) + MG38SR9 (x(Sr) 0.19149) + MG23SR6_D8A (x(Sr) 0.2069)
MgSr-06Zho.tdb	871.93	LIQUID (x(Sr) 0.17404) + MG38SR9 (x(Sr) 0.19149) + MG23SR6_D8A (x(Sr) 0.2069)
MgSr-06Zho.tdb	871.93	LIQUID (x(Sr) 0.17335) + MG38SR9 (x(Sr) 0.19149) + MG23SR6_D8A (x(Sr) 0.2069)
MgSr-06Zho.tdb	866.11	MG17SR2 (x(Sr) 0.10526) + LIQUID (x(Sr) 0.1526) + MG38SR9 (x(Sr) 0.19149)
MgSr-06Zho.tdb	866.11	MG17SR2 (x(Sr) 0.10526) + LIQUID (x(Sr) 0.1528) + MG38SR9 (x(Sr) 0.19149)
MgSr-06Zho.tdb	866.11	MG17SR2 (x(Sr) 0.10526) + LIQUID (x(Sr) 0.15231) + MG38SR9 (x(Sr) 0.19149)
MgSr-06Zho.tdb	866.11	MG17SR2 (x(Sr) 0.10526) + LIQUID (x(Sr) 0.15229) + MG38SR9 (x(Sr) 0.19149)
MgSr-06Zho.tdb	861.4	HCP_A3 (x(Sr) 9.700e-4) + LIQUID (x(Sr) 0.05857) + MG17SR2 (x(Sr) 0.10526)
MgSr-06Zho.tdb	861.4	HCP_A3 (x(Sr) 9.600e-4) + LIQUID (x(Sr) 0.05848) + MG17SR2 (x(Sr) 0.10526)
MgSr-06Zho.tdb	818.69	LIQUID (x(Sr) 0.79108) + BCC_A2 (x(Sr) 0.99712) + FCC_A1 (x(Sr) 0.99732)
MgSr-06Zho.tdb	700.28	MG2SR_C14 (x(Sr) 0.33866) + LIQUID (x(Sr) 0.69294) + FCC_A1 (x(Sr) 0.99782)
MgSr-07Alj.tdb	870.7	LIQUID (x(Sr) 0.18541) + MG23SR6_D8A (x(Sr) 0.2069) + MG2SR_C14 (x(Sr) 0.33333)
MgSr-07Alj.tdb	870.7	LIQUID (x(Sr) 0.18518) + MG23SR6_D8A (x(Sr) 0.2069) + MG2SR_C14 (x(Sr) 0.33333)
MgSr-07Alj.tdb	870.7	LIQUID (x(Sr) 0.18586) + MG23SR6_D8A (x(Sr) 0.2069) + MG2SR_C14 (x(Sr) 0.33333)
MgSr-07Alj.tdb	870.7	LIQUID (x(Sr) 0.18586) + MG23SR6_D8A (x(Sr) 0.2069) + MG2SR_C14 (x(Sr) 0.33333)
MgSr-07Alj.tdb	867.79	LIQUID (x(Sr) 0.16971) + MG38SR9 (x(Sr) 0.19149) + MG23SR6_D8A (x(Sr) 0.2069)
MgSr-07Alj.tdb	867.79	LIQUID (x(Sr) 0.16978) + MG38SR9 (x(Sr) 0.19149) + MG23SR6_D8A (x(Sr) 0.2069)
MgSr-07Alj.tdb	867.79	LIQUID (x(Sr) 0.16979) + MG38SR9 (x(Sr) 0.19149) + MG23SR6_D8A (x(Sr) 0.2069)
MgSr-07Alj.tdb	865.65	MG17SR2 (x(Sr) 0.10526) + LIQUID (x(Sr) 0.15774) + MG38SR9 (x(Sr) 0.19149)
MgSr-07Alj.tdb	865.65	MG17SR2 (x(Sr) 0.10526) + LIQUID (x(Sr) 0.15805) + MG38SR9 (x(Sr) 0.19149)
MgSr-07Alj.tdb	865.65	MG17SR2 (x(Sr) 0.10526) + LIQUID (x(Sr) 0.15802) + MG38SR9 (x(Sr) 0.19149)
MgSr-07Alj.tdb	865.65	MG17SR2 (x(Sr) 0.10526) + LIQUID (x(Sr) 0.15768) + MG38SR9 (x(Sr) 0.19149)
MgSr-07Alj.tdb	863.63	HCP_A3 (x(Sr) 8.300e-4) + LIQUID (x(Sr) 0.05651) + MG17SR2 (x(Sr) 0.10526)
MgSr-07Alj.tdb	863.63	HCP_A3 (x(Sr) 8.300e-4) + LIQUID (x(Sr) 0.05636) + MG17SR2 (x(Sr) 0.10526)
MgSr-07Alj.tdb	818.77	LIQUID (x(Sr) 0.79245) + BCC_A2 (x(Sr) 0.9973) + FCC_A1 (x(Sr) 0.99749)
MgSr-07Alj.tdb	818.77	LIQUID (x(Sr) 0.79245) + BCC_A2 (x(Sr) 0.9973) + FCC_A1 (x(Sr) 0.99749)
MgSr-07Alj.tdb	699.95	MG2SR_C14 (x(Sr) 0.33333) + LIQUID (x(Sr) 0.69071) + FCC_A1 (x(Sr) 0.99788)
MgSr-07Alj.tdb	699.95	MG2SR_C14 (x(Sr) 0.33333) + LIQUID (x(Sr) 0.69056) + FCC_A1 (x(Sr) 0.99788)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull MgSr-06Zho

Invariant reactions (literature)

Invariant reactions reported in the literature for the Mg–Sr system (24)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
962	congruent melting: Liquid = Mg2Sr	Liquid: Sr 0.3333; Mg2Sr: Sr 0.3333	experimental	[1] Zhong 2006 cites Brown 1973	Table 4, p. 6, row 20 report
953	congruent melting: Liquid = Mg2Sr	Liquid: Sr 0.3333; Mg2Sr: Sr 0.3333	experimental	[1] Zhong 2006 cites Ray 1947	Table 4, p. 6, row 19 report
953	congruent melting: Liquid = Mg2Sr	Liquid: Sr 0.3333; Mg2Sr: Sr 0.3333	experimental	[1] Zhong 2006 cites Klemm 1947 doi	Table 4, p. 6, row 18 report
951	congruent melting: Liquid = Mg2Sr	Liquid: Sr 0.3334; Mg2Sr: Sr 0.3334	model	[1] Zhong 2006	Table 4, p. 6, row 17 report
881	Liquid + Mg23Sr6 = Mg38Sr9	Liquid: Sr 0.191; Mg23Sr6: Sr 0.3333; Mg38Sr9: Sr 0.25	experimental	[1] Zhong 2006 cites Ray 1947	Table 4, p. 6, row 13 report
881	Liquid + Mg2Sr = Mg23Sr6	Liquid: Sr 0.1911; Mg2Sr: Sr 0.3333; Mg23Sr6: Sr 0.25	experimental	[1] Zhong 2006 cites Ray 1947	Table 4, p. 6, row 16 report
879.5	congruent melting: Liquid = Mg17Sr2	Liquid: Sr 0.1053; Mg17Sr2: Sr 0.1053	experimental	[1] Zhong 2006 cites Brown 1973	Table 4, p. 6, row 7 report
879	congruent melting: Liquid = Mg17Sr2	Liquid: Sr 0.1053; Mg17Sr2: Sr 0.1053	model	[1] Zhong 2006	Table 4, p. 6, row 6 report
876	Liquid + Mg2Sr = Mg23Sr6	Liquid: Sr 0.1923; Mg2Sr: Sr 0.3285; Mg23Sr6: Sr 0.2069	model	[1] Zhong 2006	Table 4, p. 6, row 15 report
876	Liquid + Mg23Sr6 = Mg38Sr9	Liquid: Sr 0.1936; Mg23Sr6: Sr 0.3333; Mg38Sr9: Sr 0.2069	experimental	[1] Zhong 2006 cites Brown 1973	Table 4, p. 6, row 14 report
872	Liquid + Mg23Sr6 = Mg38Sr9	Liquid: Sr 0.1914; Mg23Sr6: Sr 0.2069; Mg38Sr9: Sr 0.1915	model	[1] Zhong 2006	Table 4, p. 6, row 10 report
872	Liquid + Mg23Sr6 = Mg38Sr9	Liquid: Sr 0.1744; Mg23Sr6: Sr 0.25; Mg38Sr9: Sr 0.1818	experimental	[1] Zhong 2006 cites Ray 1947	Table 4, p. 6, row 12 report
871	Liquid + Mg23Sr6 = Mg38Sr9	Liquid: Sr 0.175; Mg23Sr6: Sr 0.3333; Mg38Sr9: Sr 0.2	experimental	[1] Zhong 2006 cites Klemm 1947 doi	Table 4, p. 6, row 11 report
866	Liquid = Mg17Sr2 + Mg38Sr9	Liquid: Sr 0.1526; Mg17Sr2: Sr 0.1053; Mg38Sr9: Sr 0.1915	model	[1] Zhong 2006	Table 4, p. 6, row 8 report
865	Liquid = Mg17Sr2 + Mg38Sr9	Liquid: Sr 0.1506; Mg17Sr2: Sr 0.1; Mg38Sr9: Sr 0.1818	experimental	[1] Zhong 2006 cites Ray 1947	Table 4, p. 6, row 9 report
861	Liquid = hcp-Mg + Mg17Sr2	Liquid: Sr 0.0585; hcp-Mg: Sr 0.001; Mg17Sr2: Sr 0.1053	model	[1] Zhong 2006	Table 4, p. 6, row 1 report
859	Liquid = hcp-Mg + Mg17Sr2	Liquid: Sr 0.06; hcp-Mg: Sr 3.000e-4; Mg17Sr2: Sr 0.1	experimental	[1] Zhong 2006 cites Ray 1947	Table 4, p. 6, row 4 report
858	Liquid = hcp-Mg + Mg17Sr2	Liquid: Sr 0.0645; hcp-Mg: Sr 0.001; Mg17Sr2: Sr 0.1053	experimental	[1] Zhong 2006 cites Brown 1973	Table 4, p. 6, row 5 report
858	Liquid = hcp-Mg + Mg17Sr2	Liquid: Sr 0.06; hcp-Mg: Sr 0; Mg17Sr2: Sr 0.1	experimental	[1] Zhong 2006 cites Klemm 1947 doi	Table 4, p. 6, row 3 report
855	Liquid = hcp-Mg + Mg17Sr2	Liquid: Sr 0.059; hcp-Mg: Sr 0; Mg17Sr2: Sr 0.1	experimental	[1] Zhong 2006 cites Vosskhuler 1939	Table 4, p. 6, row 2 report
711	Liquid = Mg2Sr + fcc-Al	Liquid: Sr 0.65; Mg2Sr: Sr 0.3333; fcc-Al: Sr 1	experimental	[1] Zhong 2006 cites Klemm 1947 doi	Table 4, p. 6, row 22 report
700	Liquid = Mg2Sr + fcc-Al	Liquid: Sr 0.6929; Mg2Sr: Sr 0.3387; fcc-Al: Sr 0.9978	model	[1] Zhong 2006	Table 4, p. 6, row 21 report
699	Liquid = Mg2Sr + fcc-Al	Liquid: Sr 0.7; Mg2Sr: Sr 0.3333; fcc-Al: Sr 0.855	experimental	[1] Zhong 2006 cites Ray 1947	Table 4, p. 6, row 23 report
699	Liquid = Mg2Sr + fcc-Al	Liquid: Sr 0.704; Mg2Sr: Sr 0.3333; fcc-Al: Sr 0.937	experimental	[1] Zhong 2006 cites Brown 1973	Table 4, p. 6, row 24 report

Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.

Enthalpies of formation, Mg–Sr system (6)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Mg17Sr2	Mg17Sr2	-4.7963 kJ/mol-atom	0	unspecified	-2.741 (mp-aaaaabqy)	-4.846 (oqmd-90157)	[1] Zhong 2006	Table 2, p. 4, row 2 report
Mg23Sr6	Mg23Sr6	-7.7392 kJ/mol-atom	0	unspecified	-6.786 (mp-aaaabtny)	-7.661 (oqmd-17656)	[1] Zhong 2006	Table 2, p. 4, row 4 report
Mg2Sr-C14	Mg2Sr	-10.6189 kJ/mol-atom	0	unspecified	-7.73 (mp-aaaaaduy)	-10.194 (oqmd-30729)	[1] Zhong 2006	Table 2, p. 4, row 14 report
Mg2Sr-C14	Mg2Sr	-7.117 kJ/mol-atom	298.15	experimental	-7.73 (mp-aaaaaduy)	-10.194 (oqmd-30729)	[1] Zhong 2006 cites King 1964 doi	Table 2, p. 4, row 15 report
Mg38Sr9	Mg38Sr9	-6.2742 kJ/mol-atom	0	unspecified	-5.716 (mp-aaaabtnz)	-6.185 (oqmd-684928)	[1] Zhong 2006	Table 2, p. 4, row 3 report
Sr2Mg-C14	MgSr2	36.4176 kJ/mol-atom	0	unspecified	9.104 (mp-aaackgug)	7.951 (oqmd-290200)	[1] Zhong 2006	Table 2, p. 4, row 19 report

Other properties

Crystal structure (9)

Crystal structure, Mg–Sr system
Property	Value	Phases / composition	Class	Source	Location
Lattice a printed: a (=b)	10.469 Å	Mg17Sr2 alloy: Mg 0.894737, Sr 0.105263	unspecified	[1] Zhong 2006	Table 2, p. 4, row 2 report
Lattice a printed: a	14.869 Å	Mg23Sr6 alloy: Mg 0.793103, Sr 0.206897	unspecified	[1] Zhong 2006	Table 2, p. 4, row 4 report
Lattice a printed: a	6.465 Å	Mg2Sr-C14 alloy: Mg 0.666667, Sr 0.333333	unspecified	[1] Zhong 2006	Table 2, p. 4, row 14 report
Lattice a printed: a (=b)	10.506 Å	Mg38Sr9 alloy: Mg 0.808511, Sr 0.191489	unspecified	[1] Zhong 2006	Table 2, p. 4, row 3 report
Lattice a printed: a (=b)	7.424 Å	Sr2Mg-C14 alloy: Mg 0.333333, Sr 0.666667	unspecified	[1] Zhong 2006	Table 2, p. 4, row 19 report
Lattice c printed: c	10.3 Å	Mg17Sr2 alloy: Mg 0.894737, Sr 0.105263	unspecified	[1] Zhong 2006	Table 2, p. 4, row 2 report
Lattice c printed: c	10.387 Å	Mg2Sr-C14 alloy: Mg 0.666667, Sr 0.333333	unspecified	[1] Zhong 2006	Table 2, p. 4, row 14 report
Lattice c printed: c	27.882 Å	Mg38Sr9 alloy: Mg 0.808511, Sr 0.191489	unspecified	[1] Zhong 2006	Table 2, p. 4, row 3 report
Lattice c printed: c	11.635 Å	Sr2Mg-C14 alloy: Mg 0.333333, Sr 0.666667	unspecified	[1] Zhong 2006	Table 2, p. 4, row 19 report

Sources

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

Yu Zhong, Jorge O. Sofo, Alan A. Luo, Zi-Kui Liu, Thermodynamics modeling of the Mg–Sr and Ca–Mg–Sr systems, Journal of Alloys and Compounds 421, 172-178 (2006). doi:10.1016/j.jallcom.2005.09.076

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}
}