Mg–Si system

217 accepted literature values from 6 paper(s) (experimental 169, model 38, DFT 7, unspecified 3); 7 calculated phase diagram(s). 12 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 (6) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	169
model	38
DFT	7
unspecified	3

Accepted values by property group
Property group	Values
invariant reaction	78
phase transition	2
formation	49
mixing / partial	24
heat capacity / entropy / enthalpy	62
crystal structure	1
other property	1

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
MgSi-00Yan-LB.tdb	X.-Y. Yan, F. Zhang, Y.A. Chang, J. Phase Equilib., 21, 379-84(2000). doi:10.1361/105497100770339914	`7347483183dd69b235e8f17e2415d2f3f08f25c17dc1aaf238f9d12484a8ded3`	viewer · TDB · JSON
MgSi-04Kev.tdb	D. Kevorkov, R. Schmid-Fetzer, F. Zhang, J. Phase Equilib. Diffus., 25, 140-51(2004). doi:10.1361/15477030418569	`8a16b2608533d0410bf1308a14792d53ea882323537c98fcad84aa15c1149874`	viewer · TDB · JSON
MgSi-09Yua.tdb	X. Yuan, W. Sun, Y. Du, D. Zhao, H. Yang, Calphad, 33, 673-78(2009). doi:10.1016/j.calphad.2009.08.004	`d51ae3480eef32b86386bfcb89fc7bcd133e2616fcaa0fe198f6fae6fb50c6f0`	viewer · TDB · JSON
MgSi-12Sch.tdb	M. Schick, B. Hallstedt, A. Glensk, B. Grabowski, T. Hickel, M. Hampl, J. Groebner, J. Neugebauer, R. Schmid-Fetzer, Calphad, 37, 77-86(2012). doi:10.1016/j.calphad.2012.02.001	`fb5bcd7ddaaab551834ae583f3ba434991b4d8f8b5a09af0099cd9b7003ca827`	viewer · TDB · JSON
MgSi-16Lia.tdb	S.-M. Liang, P. Wang, R. Schmid-Fetzer, Calphad, 54, 82-96(2016). doi:10.1016/j.calphad.2016.06.003	`01f8dc8d22e0e37fc9047037567160dc45afa097c94df789ff0838c79493a87e`	viewer · TDB · JSON
MgSi-86Lud.tdb	D. Luedecke, Z. Metallkd., 77, 278-83(1986). doi:10.1515/ijmr-1986-770503	`9be7ae691d0061a0b17db2f254fadff336ac03a68fc3d3318104cfb8f73bcbcb`	viewer · TDB · JSON
MgSi-97Feu.tdb	H. Feufel, T. Godecke, H.L. Lukas, F. Sommer, J. Alloys Compd., 247, 31-42(1997). doi:10.1016/S0925-8388(96)02655-2	`ebffb15d1bb1ae713a974883794182d50b7db69577957dc87b49777834197069`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
MgSi-00Yan-LB.tdb	1216.94	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.53013) + DIAMOND_A4 (x(Si) 1)
MgSi-00Yan-LB.tdb	1216.94	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.53022) + DIAMOND_A4 (x(Si) 1)
MgSi-00Yan-LB.tdb	1216.94	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.53031) + DIAMOND_A4 (x(Si) 1)
MgSi-00Yan-LB.tdb	912.35	HCP_A3 (x(Si) 6.000e-5) + LIQUID (x(Si) 0.0132) + MG2SI_C1 (x(Si) 0.33333)
MgSi-00Yan-LB.tdb	912.35	HCP_A3 (x(Si) 5.000e-5) + LIQUID (x(Si) 0.01306) + MG2SI_C1 (x(Si) 0.33333)
MgSi-04Kev.tdb	1219.67	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.54114) + DIAMOND_A4 (x(Si) 1)
MgSi-04Kev.tdb	1219.67	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.54124) + DIAMOND_A4 (x(Si) 1)
MgSi-04Kev.tdb	1219.67	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.54148) + DIAMOND_A4 (x(Si) 1)
MgSi-04Kev.tdb	910.53	HCP_A3 (x(Si) 5.000e-5) + LIQUID (x(Si) 0.01455) + MG2SI_C1 (x(Si) 0.33333)
MgSi-04Kev.tdb	910.53	HCP_A3 (x(Si) 5.000e-5) + LIQUID (x(Si) 0.01446) + MG2SI_C1 (x(Si) 0.33333)
MgSi-09Yua.tdb	1218.74	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.53494) + DIAMOND_A4 (x(Si) 1)
MgSi-09Yua.tdb	1218.74	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.53505) + DIAMOND_A4 (x(Si) 1)
MgSi-09Yua.tdb	1218.74	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.5352) + DIAMOND_A4 (x(Si) 1)
MgSi-09Yua.tdb	911.75	HCP_A3 (x(Si) 3.000e-5) + LIQUID (x(Si) 0.01363) + MG2SI_C1 (x(Si) 0.33333)
MgSi-09Yua.tdb	911.75	HCP_A3 (x(Si) 3.000e-5) + LIQUID (x(Si) 0.01351) + MG2SI_C1 (x(Si) 0.33333)
MgSi-12Sch.tdb	1212.46	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.54294) + DIAMOND_A4 (x(Si) 1)
MgSi-12Sch.tdb	1212.46	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.54306) + DIAMOND_A4 (x(Si) 1)
MgSi-12Sch.tdb	1212.46	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.54314) + DIAMOND_A4 (x(Si) 1)
MgSi-12Sch.tdb	910.24	HCP_A3 (x(Si) 3.000e-5) + LIQUID (x(Si) 0.01471) + MG2SI_C1 (x(Si) 0.33333)
MgSi-12Sch.tdb	910.24	HCP_A3 (x(Si) 3.000e-5) + LIQUID (x(Si) 0.01464) + MG2SI_C1 (x(Si) 0.33333)
MgSi-16Lia.tdb	1212.97	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.53711) + DIAMOND_A4 (x(Si) 0.99991)
MgSi-16Lia.tdb	1212.97	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.53714) + DIAMOND_A4 (x(Si) 0.99991)
MgSi-16Lia.tdb	910.39	HCP_A3 (x(Si) 3.000e-5) + LIQUID (x(Si) 0.01483) + MG2SI_C1 (x(Si) 0.33333)
MgSi-16Lia.tdb	910.39	HCP_A3 (x(Si) 3.000e-5) + LIQUID (x(Si) 0.01475) + MG2SI_C1 (x(Si) 0.33333)
MgSi-86Lud.tdb	1219.44	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.53106) + DIAMOND_A4 (x(Si) 1)
MgSi-86Lud.tdb	1219.44	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.5312) + DIAMOND_A4 (x(Si) 1)
MgSi-86Lud.tdb	1219.44	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.5312) + DIAMOND_A4 (x(Si) 1)
MgSi-86Lud.tdb	1219.44	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.53147) + DIAMOND_A4 (x(Si) 1)
MgSi-86Lud.tdb	923	HCP_A3 (x(Si) 0) + LIQUID (x(Si) 0) + MG2SI_C1 (x(Si) 0.33333)
MgSi-86Lud.tdb	912.53	HCP_A3 (x(Si) 1.000e-5) + LIQUID (x(Si) 0.01339) + MG2SI_C1 (x(Si) 0.33333)
MgSi-86Lud.tdb	912.53	HCP_A3 (x(Si) 1.000e-5) + LIQUID (x(Si) 0.01323) + MG2SI_C1 (x(Si) 0.33333)
MgSi-97Feu.tdb	1216.62	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.54181) + DIAMOND_A4 (x(Si) 1)
MgSi-97Feu.tdb	1216.62	MG2SI_C1 (x(Si) 0.33333) + LIQUID (x(Si) 0.54188) + DIAMOND_A4 (x(Si) 1)
MgSi-97Feu.tdb	911.88	HCP_A3 (x(Si) 3.000e-5) + LIQUID (x(Si) 0.01297) + MG2SI_C1 (x(Si) 0.33333)
MgSi-97Feu.tdb	911.88	HCP_A3 (x(Si) 3.000e-5) + LIQUID (x(Si) 0.01285) + MG2SI_C1 (x(Si) 0.33333)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull MgSi-00Yan-LB · CALPHAD hull MgSi-04Kev · CALPHAD hull MgSi-09Yua · CALPHAD hull MgSi-12Sch · CALPHAD hull MgSi-86Lud · CALPHAD hull MgSi-97Feu

Invariant reactions (literature)

Invariant reactions reported in the literature for the Mg–Si system (78)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
1363.15	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Lebeau 1901	Table 5, p. 5, row 2 report
1363	congruent melting: L -> Mg2Si	L: Si 0.333; Mg2Si: Si 0.333	experimental	[2] Schick 2012 cites Vogel 1909 doi	Table 5, p. 8, row 15 report
1358.15	congruent melting: L -> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Klemm 1941 doi	Table 5, p. 4, row 12 report
1358.15	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Caulfield 1966	Table 5, p. 5, row 14 report
1358.15	congruent melting: L -> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Geffken 1968	Table 5, p. 4, row 16 report
1358.15	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Geffken 1968	Table 5, p. 5, row 18 report
1358	congruent melting: L -> Mg2Si	L: Si 0.333; Mg2Si: Si 0.333	experimental	[2] Schick 2012 cites Geffken 1968	Table 5, p. 8, row 17 report
1357.75	congruent melting: L -> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	model	[3] Yuan 2009	Table 5, p. 4, row 22 report
1357.45	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000	Table 5, p. 5, row 36 report
1354.15	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Ludecke 1986	Table 5, p. 5, row 27 report
1353.15	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Dorner 1981 doi	Table 5, p. 5, row 24 report
1353.15	congruent melting: L -> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Eldridge 1967	Table 5, p. 4, row 13 report
1351.15	congruent melting: L -> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Schurmann 1977	Table 5, p. 4, row 19 report
1351.15	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Schurmann 1977	Table 5, p. 5, row 21 report
1351	congruent melting: L -> Mg2Si	L: Si 0.333; Mg2Si: Si 0.333	experimental	[2] Schick 2012 cites Schurmann 1977	Table 5, p. 8, row 18 report
1350.5	congruent melting: L -> Mg2Si	L: Si 0.333; Mg2Si: Si 0.333	model	[2] Schick 2012	Table 5, p. 8, row 21 report
1350.15	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Eldridge 1967	Table 5, p. 5, row 15 report
1349.95	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Lukas 1994	Table 5, p. 5, row 30 report
1349.55	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Feufel 1997 doi	Table 5, p. 5, row 33 report
1346	congruent melting: L -> Mg2Si	L: Si 0.333; Mg2Si: Si 0.333	experimental	[2] Schick 2012	Table 5, p. 8, row 20 report
1345.15	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Beardmore 1966	Table 5, p. 5, row 13 report
1343.15	congruent melting: L -> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Vogel 1909 doi	Table 5, p. 4, row 3 report
1343.15	congruent melting: L <-> Mg2Si	L: Mg 0.666667, Si 0.333333; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Vogel 1909 doi	Table 5, p. 5, row 5 report
1343	congruent melting: L -> Mg2Si	L: Si 0.333; Mg2Si: Si 0.333	experimental	[2] Schick 2012 cites Wohler 1926 doi	Table 5, p. 8, row 16 report
1223.15	eutectic: L <-> Mg2Si + (Si)	L: Si 0.5444; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Vogel 1909 doi	Table 5, p. 5, row 4 report
1223.15	eutectic: L -> Mg2Si + Si-diamond	L: Si 0.544; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Vogel 1909 doi	Table 5, p. 4, row 2 report
1223	eutectic: L -> Mg2Si + Si (dia)	L: Si 0.54; Mg2Si: Si 0.333; Si (dia): Si 1	experimental	[2] Schick 2012 cites Vogel 1909 doi	Table 5, p. 8, row 8 report
1219	eutectic: L -> Mg2Si + Si (dia)	L: Si 0.529; Mg2Si: Si 0.333; Si (dia): Si 1	experimental	[2] Schick 2012 cites Farkas 1985	Table 5, p. 8, row 12 report
1218.8	eutectic: L -> Mg2Si + Si (dia)	L: Si 0.53; Mg2Si: Si 0.333; Si (dia): Si 1	experimental	[2] Schick 2012 cites Geffken 1968	Table 5, p. 8, row 10 report
1218.75	eutectic: L -> Mg2Si + Si-diamond	L: Si 0.53; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Geffken 1968	Table 5, p. 4, row 15 report
1218.75	eutectic: L <-> Mg2Si + (Si)	L: Si 0.53; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Geffken 1968	Table 5, p. 5, row 17 report
1218.75	eutectic: L -> Mg2Si + Si-diamond	L: Si 0.535; Mg2Si: Mg 0.666667, Si 0.333333	model	[3] Yuan 2009	Table 5, p. 4, row 21 report
1217.15	eutectic: L <-> Mg2Si + (Si)	L: Si 0.5302; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000	Table 5, p. 5, row 35 report
1217.15	eutectic: L <-> Mg2Si + (Si)	Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Dorner 1981 doi	Table 5, p. 5, row 23 report
1216.71	eutectic: L <-> Mg2Si + (Si)	L: Si 0.5418; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Feufel 1997 doi	Table 5, p. 5, row 32 report
1216.69	eutectic: L <-> Mg2Si + (Si)	L: Si 0.5401; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Lukas 1994	Table 5, p. 5, row 29 report
1215.5	eutectic: L <-> Mg2Si + (Si)	L: Si 0.529; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Ludecke 1986	Table 5, p. 5, row 26 report
1215	eutectic: Liquid → Mg2 Si + (Si)		experimental	[2] Schick 2012	p. 4 report	The temperature of the eutectic reaction Liquid → Mg2 Si + (Si), determined from onset values of peaks on heating, was 1215 K.
1215	eutectic: L -> Mg2Si + Si (dia)	Mg2Si: Mg 0.666667, Si 0.333333	experimental	[2] Schick 2012	Table 5, p. 8, row 13 report
1214.4	eutectic: Liquid -> Mg2Si + diamond	Liquid: Si 0.53; Mg2Si: Si 0.333; diamond: Si 1	model	[4] (ed.) 1998	Table I, p. 239, row 2 report
1213.15	eutectic: L <-> Mg2Si + (Si)	Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Schurmann 1977	Table 5, p. 5, row 20 report
1213.15	eutectic: L -> Mg2Si + Si-diamond	L: Si 0.541; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Schurmann 1977	Table 5, p. 4, row 18 report
1213	eutectic: L -> Mg2Si + Si (dia)	L: Si 0.541; Mg2Si: Si 0.333; Si (dia): Si 1	experimental	[2] Schick 2012 cites Schurmann 1977	Table 5, p. 8, row 11 report
1212.5	eutectic: L -> Mg2Si + Si (dia)	L: Si 0.543; Mg2Si: Si 0.333; Si (dia): Si 1	model	[2] Schick 2012	Table 5, p. 8, row 14 report
1193.15	eutectic: L -> Mg2Si + Si-diamond	L: Si 0.534; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Wohler 1926 doi	Table 5, p. 4, row 6 report
1193.15	eutectic: L <-> Mg2Si + (Si)	L: Si 0.5343; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Woler 1926	Table 5, p. 5, row 7 report
1193	eutectic: L -> Mg2Si + Si (dia)	L: Si 0.53; Mg2Si: Si 0.333; Si (dia): Si 1	experimental	[2] Schick 2012 cites Wohler 1926 doi	Table 5, p. 8, row 9 report
919	eutectic: L -> Mg (hcp) + Mg2Si	L: Si 0.035; Mg (hcp): Si 0; Mg2Si: Si 0.333	experimental	[2] Schick 2012 cites Vogel 1909 doi	Table 5, p. 8, row 1 report
918.15	eutectic: L -> (Mg)-hcp + Mg2Si	L: Si 0.0348; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Vogel 1909 doi	Table 5, p. 4, row 1 report
918.15	eutectic: L -> (Mg)-hcp + Mg2Si	L: Si 0.012; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Schmidt 1927	Table 5, p. 4, row 7 report
918.15	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.0348; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Vogel 1909 doi	Table 5, p. 5, row 3 report
918.15	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.0119; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Schmidt 1927	Table 5, p. 5, row 8 report
918	eutectic: L -> Mg (hcp) + Mg2Si	L: Si 0.012; Mg (hcp): Si 0; Mg2Si: Si 0.333	experimental	[2] Schick 2012 cites Schmidt 1927	Table 5, p. 8, row 2 report
915.15	eutectic: L -> (Mg)-hcp + Mg2Si	L: Si 0.0105; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Goto 1937	Table 5, p. 4, row 10 report
915.15	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.0105; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Goto 1937	Table 5, p. 5, row 11 report
913.15	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.0278; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Elchardus 1935	Table 5, p. 5, row 9 report
912.35	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.013; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000	Table 5, p. 5, row 34 report
912.3	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.0117; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Dorner 1981 doi	Table 5, p. 5, row 22 report
912.02	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.0129; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Feufel 1997 doi	Table 5, p. 5, row 31 report
912	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.0133; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Ludecke 1986	Table 5, p. 5, row 25 report
911.82	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.013; Mg2Si: Mg 0.666667, Si 0.333333	model	[1] Yan 2000 cites Lukas 1994	Table 5, p. 5, row 28 report
911.8	eutectic: Liquid -> hcp-A3 + Mg2Si	Liquid: Si 0.013; hcp-A3: Si 0; Mg2Si: Si 0.333	model	[4] (ed.) 1998	Table I, p. 239, row 1 report
911.75	eutectic: L -> (Mg)-hcp + Mg2Si	Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Geffken 1968	Table 5, p. 4, row 14 report
911.75	eutectic: L -> (Mg)-hcp + Mg2Si	L: Si 0.0135; Mg2Si: Mg 0.666667, Si 0.333333	model	[3] Yuan 2009	Table 5, p. 4, row 20 report
911.75	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.0116; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Geffken 1968	Table 5, p. 5, row 16 report
911.7	eutectic: L -> Mg (hcp) + Mg2Si	Mg2Si: Mg 0.666667, Si 0.333333	experimental	[2] Schick 2012 cites Geffken 1968	Table 5, p. 8, row 5 report
910.85	eutectic: L -> (Mg)-hcp + Mg2Si	L: Si 0.0116; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Raynor 1940	Table 5, p. 4, row 11 report
910.75	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.0116; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Raynor 1940	Table 5, p. 5, row 12 report
910.7	eutectic: L -> Mg (hcp) + Mg2Si	L: Si 0.0116; Mg (hcp): Si 3.000e-5; Mg2Si: Si 0.333	experimental	[2] Schick 2012 cites Raynor 1940	Table 5, p. 8, row 3 report
910.2	eutectic: L -> Mg (hcp) + Mg2Si	L: Si 0.0146; Mg (hcp): Si 2.900e-5; Mg2Si: Si 0.333	model	[2] Schick 2012	Table 5, p. 8, row 7 report
910.15	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.015; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Schurmann 1977	Table 5, p. 5, row 19 report
910.15	eutectic: L -> (Mg)-hcp + Mg2Si	L: Si 0.013; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Schurmann 1977	Table 5, p. 4, row 17 report
910	eutectic: L -> Mg (hcp) + Mg2Si	L: Si 0.013; Mg2Si: Si 0.333	experimental	[2] Schick 2012 cites Schurmann 1977	Table 5, p. 8, row 6 report
905.15	eutectic: L <-> (Mg) + Mg2Si	L: Si 0.0208; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Sawamoto 1935	Table 5, p. 5, row 10 report
905.15	eutectic: L -> (Mg)-hcp + Mg2Si	L: Si 0.0208; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Sawamoto 1935	Table 5, p. 4, row 9 report
898.15	eutectic: L <-> (Mg) + Mg2Si	Mg2Si: Mg 0.666667, Si 0.333333	experimental	[1] Yan 2000 cites Woler 1926	Table 5, p. 5, row 6 report
898.15	eutectic: L -> (Mg)-hcp + Mg2Si	Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Wohler 1926 doi	Table 5, p. 4, row 5 report
848.15	eutectic: L -> (Mg)-hcp + Mg2Si	L: Si 0.0278; Mg2Si: Mg 0.666667, Si 0.333333	experimental	[3] Yuan 2009 cites Elchardus 1935	Table 5, p. 4, row 8 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–Si system (32)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Mg2Si	Mg2Si	-61.9 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[3] Yuan 2009 cites ref. 1966Cau	Table 3, p. 3, row 6 report
Mg2Si	Mg2Si	-29.7 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[3] Yuan 2009 cites ref. 1971Bla	Table 3, p. 3, row 8 report
Mg2Si	Mg2Si	-29.7 kJ/mol-atom	298.15	model	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[2] Schick 2012 cites Blachnik 1971	Table 3, p. 7, row 3 report
Mg2Si	Mg2Si	-29.7 kJ/mol-atom	298.15	model	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000 cites Chakraborti 1992 doi	Table 2, p. 4, row 8 report
Mg2Si	Mg2Si	-27.9 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[3] Yuan 2009 cites ref. 1963Rya	Table 3, p. 3, row 3 report
Mg2Si	Mg2Si	-27.1 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[3] Yuan 2009 cites ref. 1967Ger	Table 3, p. 3, row 7 report
Mg2Si	Mg2Si	-26.67 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000 cites Lukashenko 1964	Table 2, p. 4, row 4 report
Mg2Si	Mg2Si	-26.47 kJ/mol-atom	298.15	model	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000 cites Ludecke 1986	Table 2, p. 4, row 9 report
Mg2Si	Mg2Si	-26.4 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[3] Yuan 2009 cites ref. 1964Luk	Table 3, p. 3, row 4 report
Mg2Si	Mg2Si	-26.4 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[2] Schick 2012 cites Caulfield 1962	Table 3, p. 7, row 2 report
Mg2Si	Mg2Si	-26.37 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000 cites Caulfield 1962	Table 2, p. 4, row 3 report
Mg2Si	Mg2Si	-26.3 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000 cites Kubaschewski 1949	Table 2, p. 4, row 1 report
Mg2Si	Mg2Si	-26 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[2] Schick 2012 cites Kubaschewski 1949	Table 3, p. 7, row 1 report
Mg2Si	Mg2Si	-25.9 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[3] Yuan 2009 cites ref. 1949Kub	Table 3, p. 3, row 1 report
Mg2Si	Mg2Si	-22.99 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000 cites Eldridge 1967	Table 2, p. 4, row 5 report
Mg2Si	Mg2Si	-22.2 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[3] Yuan 2009 cites ref. 1981Rao	Table 3, p. 3, row 9 report
Mg2Si	Mg2Si	-22.16 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000 cites Rao 1981	Table 2, p. 4, row 6 report
Mg2Si	Mg2Si	-21.74 kJ/mol-atom	298.15	model	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000 cites Feufel 1997 doi	Table 2, p. 4, row 11 report
Mg2Si	Mg2Si	-21.37 kJ/mol-atom	298.15	model	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000	Table 2, p. 4, row 12 report
Mg2Si	Mg2Si	-21.1 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000 cites Feufel 1997 doi	Table 2, p. 4, row 7 report
Mg2Si	Mg2Si	-21.1 kJ/mol-atom	298.15	unspecified	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[2] Schick 2012	Table 3, p. 7, row 10 report
Mg2Si	Mg2Si	-21.1 kJ/mol-atom	298.15	unspecified	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[2] Schick 2012 cites Feufel 1997 doi	Table 3, p. 7, row 4 report
Mg2Si	Mg2Si	-21.1 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[3] Yuan 2009 cites ref. 1997Feu	Table 3, p. 3, row 10 report
Mg2Si	Mg2Si	-21.01 kJ/mol-atom	298.15	model	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000 cites Lukas 1994	Table 2, p. 4, row 10 report
Mg2Si	Mg2Si	-21 kJ/mol-atom		model	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[3] Yuan 2009	Table 3, p. 3, row 13 report
Mg2Si		-18.2 kJ/mol-atom	0	DFT			[3] Yuan 2009	Table 3, p. 3, row 12 report
Mg2Si		-17.7 kJ/mol-atom		DFT			[3] Yuan 2009 cites ref. 2009Zha	Table 3, p. 3, row 11 report
Mg2Si		-17.7 kJ/mol-atom	298.15	DFT			[2] Schick 2012 cites Zhang 2009 doi	Table 3, p. 7, row 5 report
Mg2Si		-16.7 kJ/mol-atom	298.15	DFT			[2] Schick 2012	Table 3, p. 7, row 8 report
Mg2Si		-15.4 kJ/mol-atom	298.15	DFT			[2] Schick 2012	Table 3, p. 7, row 9 report
Mg2Si	Mg2Si	-14.21 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[1] Yan 2000 cites Grjotheim 1962	Table 2, p. 4, row 2 report
Mg2Si	Mg2Si	-14.2 kJ/mol-atom	298.15	experimental	-12.42 (mp-aaaaacap)	-15.603 (oqmd-17649)	[3] Yuan 2009 cites ref. 1962Grj	Table 3, p. 3, row 2 report

Other properties

Phase transition (2)

Phase transition, Mg–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1346 K	1346	congruent melting	experimental	[2] Schick 2012	p. 6 report	Also the congruent melting temperature of Mg2 Si has been determined TL = 1346 K.
Phase transition	1350 K	1350	congruent melting: Mg2Si -> Liquid Mg2Si: Si 0.333; Liquid: Si 0.333	model	[4] (ed.) 1998	Table I, p. 239, row 3 report

Formation (17)

Formation, Mg–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy of formation printed: ΔSf	-1.7 J/mol-atom/K		Mg2Si alloy: Si 0.333333	model	[3] Yuan 2009	Table 3, p. 3, row 13 report
Entropy of formation printed: ΔS_f,Mg2Si^298	-20.58 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	model	[1] Yan 2000 cites Chakraborti 1992 doi	Table 3, p. 4, row 7 report
Entropy of formation printed: ΔS_f,Mg2Si^298	-9.3 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[1] Yan 2000 cites Lukashenko 1964	Table 3, p. 4, row 2 report
Entropy of formation printed: ΔS_f,Mg2Si^298	-9 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[1] Yan 2000 cites Grjotheim 1962	Table 3, p. 4, row 1 report
Entropy of formation printed: ΔS_f,Mg2Si^298	-2.68 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[1] Yan 2000 cites Geffken 1968	Table 3, p. 4, row 3 report
Entropy of formation printed: ΔSf	-7.3 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[3] Yuan 2009 cites ref. 1964Luk	Table 3, p. 3, row 4 report
Entropy of formation printed: ΔS_f,Mg2Si^298	-2.7 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	model	[1] Yan 2000 cites Lukas 1994	Table 3, p. 4, row 9 report
Entropy of formation printed: ΔS_f,Mg2Si^298	-5.37 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[1] Yan 2000 cites Barin 1973	Table 3, p. 4, row 4 report
Entropy of formation printed: ΔSf	-2.7 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[3] Yuan 2009 cites ref. 1967Ger	Table 3, p. 3, row 7 report
Entropy of formation printed: ΔSf	-4.7 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[3] Yuan 2009 cites ref. 1981Rao	Table 3, p. 3, row 9 report
Entropy of formation printed: ΔSf	3.1 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[3] Yuan 2009 cites ref. 1962Grj	Table 3, p. 3, row 2 report
Entropy of formation printed: ΔS_f,Mg2Si^298	-6.81 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[1] Yan 2000 cites Kubaschewski 1979	Table 3, p. 4, row 5 report
Entropy of formation printed: ΔS_f,Mg2Si^298	-6.66667 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	model	[1] Yan 2000 cites Ludecke 1986	Table 3, p. 4, row 8 report
Entropy of formation printed: ΔSf	-0.5 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[3] Yuan 2009 cites ref. 1965Man	Table 3, p. 3, row 5 report
Entropy of formation printed: ΔS_f,Mg2Si^298	-2.68 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	model	[1] Yan 2000 cites Feufel 1997 doi	Table 3, p. 4, row 10 report
Entropy of formation printed: ΔS_f,Mg2Si^298	-4.95667 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	model	[1] Yan 2000	Table 3, p. 4, row 11 report
Entropy of formation printed: ΔS_f,Mg2Si^298	-4.72667 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[1] Yan 2000 cites Rao 1981	Table 3, p. 4, row 6 report

Mixing / partial (24)

Mixing / partial, Mg–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Enthalpy of mixing printed: Δ^{E,0}H_{Mg+Si}	19.64 kJ/mol (basis unstated) ± 1.18	1000	liquid	experimental	[5] Feufel 1997	Table 3, p. 3, row 12 report
Enthalpy of mixing printed: Δ*H_{Mg+Si}	23.84 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.991, Si 0.009	experimental	[5] Feufel 1997	Table 3, p. 3, row 9 report
Enthalpy of mixing printed: Δ*H_{Mg+Si}	21.71 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.994, Si 0.006	experimental	[5] Feufel 1997	Table 3, p. 3, row 2 report
Enthalpy of mixing printed: Δ*H_{Mg+Si}	21.02 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.991, Si 0.009	experimental	[5] Feufel 1997	Table 3, p. 3, row 3 report
Enthalpy of mixing printed: Δ*H_{Mg+Si}	22.15 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.989, Si 0.011	experimental	[5] Feufel 1997	Table 3, p. 3, row 4 report
Enthalpy of mixing printed: Δ*H_{Mg+Si}	22.67 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.983, Si 0.017	experimental	[5] Feufel 1997	Table 3, p. 3, row 6 report
Enthalpy of mixing printed: Δ*H_{Mg+Si}	19.72 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.994, Si 0.006	experimental	[5] Feufel 1997	Table 3, p. 3, row 8 report
Enthalpy of mixing printed: Δ*H_{Mg+Si}	20.62 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.996, Si 0.004	experimental	[5] Feufel 1997	Table 3, p. 3, row 1 report
Enthalpy of mixing printed: Δ*H_{Mg+Si}	21.05 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.986, Si 0.014	experimental	[5] Feufel 1997	Table 3, p. 3, row 5 report
Enthalpy of mixing printed: Δ*H_{Mg+Si}	22.55 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.987, Si 0.013	experimental	[5] Feufel 1997	Table 3, p. 3, row 10 report
Enthalpy of mixing printed: Δ*H_{Mg+Si}	19.27 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.997, Si 0.003	experimental	[5] Feufel 1997	Table 3, p. 3, row 7 report
Enthalpy of mixing printed: Δ*H_{Mg+Si}	23.26 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.984, Si 0.016	experimental	[5] Feufel 1997	Table 3, p. 3, row 11 report
Partial enthalpy printed: ΔE,0 H Mg+Si (infinite dilution)	19.64 kJ/mol (basis unstated) ± 1.18	1000	UNKNOWN	experimental	[5] Feufel 1997	Table 3, p. 3, row 12 report
Partial enthalpy printed: Enthalpy of solution ΔE H Mg+Si	23.84 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.991, Si 0.009	experimental	[5] Feufel 1997	Table 3, p. 3, row 9 report
Partial enthalpy printed: Enthalpy of solution ΔE H Mg+Si	21.71 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.994, Si 0.006	experimental	[5] Feufel 1997	Table 3, p. 3, row 2 report
Partial enthalpy printed: Enthalpy of solution ΔE H Mg+Si	21.02 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.991, Si 0.009	experimental	[5] Feufel 1997	Table 3, p. 3, row 3 report
Partial enthalpy printed: Enthalpy of solution ΔE H Mg+Si	22.15 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.989, Si 0.011	experimental	[5] Feufel 1997	Table 3, p. 3, row 4 report
Partial enthalpy printed: Enthalpy of solution ΔE H Mg+Si	22.67 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.983, Si 0.017	experimental	[5] Feufel 1997	Table 3, p. 3, row 6 report
Partial enthalpy printed: Enthalpy of solution ΔE H Mg+Si	19.72 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.994, Si 0.006	experimental	[5] Feufel 1997	Table 3, p. 3, row 8 report
Partial enthalpy printed: Enthalpy of solution ΔE H Mg+Si	20.62 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.996, Si 0.004	experimental	[5] Feufel 1997	Table 3, p. 3, row 1 report
Partial enthalpy printed: Enthalpy of solution ΔE H Mg+Si	21.05 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.986, Si 0.014	experimental	[5] Feufel 1997	Table 3, p. 3, row 5 report
Partial enthalpy printed: Enthalpy of solution ΔE H Mg+Si	22.55 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.987, Si 0.013	experimental	[5] Feufel 1997	Table 3, p. 3, row 10 report
Partial enthalpy printed: Enthalpy of solution ΔE H Mg+Si	19.27 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.997, Si 0.003	experimental	[5] Feufel 1997	Table 3, p. 3, row 7 report
Partial enthalpy printed: Enthalpy of solution ΔE H Mg+Si	23.26 kJ/mol (basis unstated)	1000	liquid alloy: Mg 0.984, Si 0.016	experimental	[5] Feufel 1997	Table 3, p. 3, row 11 report

Heat capacity / entropy / enthalpy (62)

Heat capacity / entropy / enthalpy, Mg–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy printed: °S298	25.5 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	DFT	[2] Schick 2012	Table 3, p. 7, row 8 report
Entropy printed: °S298	27.6 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012 cites Mannchen 1965 doi	Table 3, p. 7, row 6 report
Entropy printed: °S298	25.3 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	unspecified	[2] Schick 2012	Table 3, p. 7, row 10 report
Entropy printed: °S298	26.4 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	DFT	[2] Schick 2012	Table 3, p. 7, row 9 report
Entropy printed: °S298	25.3 J/mol-atom/K	298.15	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012 cites Gerstein 1967 doi	Table 3, p. 7, row 7 report
Heat capacity printed: Cp	23.2 J/mol-atom/K ± 0.5	363	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 1 report
Heat capacity printed: Cp	23.35 J/mol-atom/K ± 0.5	383	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 2 report
Heat capacity printed: Cp	23.5 J/mol-atom/K ± 0.5	403	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 3 report
Heat capacity printed: Cp	23.65 J/mol-atom/K ± 0.5	423	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 4 report
Heat capacity printed: Cp	23.7 J/mol-atom/K ± 0.5	443	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 5 report
Heat capacity printed: Cp	23.8 J/mol-atom/K ± 0.5	463	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 6 report
Heat capacity printed: Cp	25.12 J/mol-atom/K	473	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 1 report
Heat capacity printed: Cp	23.45 J/mol-atom/K	473	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 1 report
Heat capacity printed: Cp	23.9 J/mol-atom/K ± 0.5	483	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 7 report
Heat capacity printed: Cp	23.63 J/mol-atom/K	493	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 2 report
Heat capacity printed: Cp	25.26 J/mol-atom/K	493	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 2 report
Heat capacity printed: Cp	24 J/mol-atom/K ± 0.5	503	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 8 report
Heat capacity printed: Cp	23.8 J/mol-atom/K	513	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 3 report
Heat capacity printed: Cp	25.41 J/mol-atom/K	513	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 3 report
Heat capacity printed: Cp	24.1 J/mol-atom/K ± 0.5	523	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 9 report
Heat capacity printed: Cp	23.98 J/mol-atom/K	533	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 4 report
Heat capacity printed: Cp	25.54 J/mol-atom/K	533	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 4 report
Heat capacity printed: Cp	24.2 J/mol-atom/K ± 0.5	543	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 10 report
Heat capacity printed: Cp	24.12 J/mol-atom/K	553	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 5 report
Heat capacity printed: Cp	25.7 J/mol-atom/K	553	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 5 report
Heat capacity printed: Cp	24.25 J/mol-atom/K ± 0.5	563	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 11 report
Heat capacity printed: Cp	25.88 J/mol-atom/K	573	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 6 report
Heat capacity printed: Cp	24.32 J/mol-atom/K	573	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 6 report
Heat capacity printed: Cp	24.3 J/mol-atom/K ± 0.5	583	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 12 report
Heat capacity printed: Cp	26.07 J/mol-atom/K	593	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 7 report
Heat capacity printed: Cp	24.53 J/mol-atom/K	593	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 7 report
Heat capacity printed: Cp	24.3 J/mol-atom/K ± 0.5	603	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 13 report
Heat capacity printed: Cp	26.27 J/mol-atom/K	613	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 8 report
Heat capacity printed: Cp	24.74 J/mol-atom/K	613	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 8 report
Heat capacity printed: Cp	24.45 J/mol-atom/K ± 0.5	623	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 14 report
Heat capacity printed: Cp	24.95 J/mol-atom/K	633	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 9 report
Heat capacity printed: Cp	26.46 J/mol-atom/K	633	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 9 report
Heat capacity printed: Cp	24.7 J/mol-atom/K ± 0.5	643	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 15 report
Heat capacity printed: Cp	25.14 J/mol-atom/K	653	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 10 report
Heat capacity printed: Cp	26.65 J/mol-atom/K	653	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 10 report
Heat capacity printed: Cp	24.95 J/mol-atom/K ± 0.5	663	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 16 report
Heat capacity printed: Cp	26.81 J/mol-atom/K	673	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 11 report
Heat capacity printed: Cp	25.3 J/mol-atom/K	673	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 11 report
Heat capacity printed: Cp	25.3 J/mol-atom/K ± 0.5	683	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 17 report
Heat capacity printed: Cp	25.43 J/mol-atom/K	693	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 12 report
Heat capacity printed: Cp	26.94 J/mol-atom/K	693	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 12 report
Heat capacity printed: Cp	25.5 J/mol-atom/K ± 0.5	703	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 18 report
Heat capacity printed: Cp	27.04 J/mol-atom/K	713	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 13 report
Heat capacity printed: Cp	25.52 J/mol-atom/K	713	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 13 report
Heat capacity printed: Cp	25.7 J/mol-atom/K ± 0.5	723	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 19 report
Heat capacity printed: Cp	25.55 J/mol-atom/K	733	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 14 report
Heat capacity printed: Cp	27.08 J/mol-atom/K	733	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 14 report
Heat capacity printed: Cp	25.9 J/mol-atom/K ± 0.5	743	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 20 report
Heat capacity printed: Cp	25.53 J/mol-atom/K	753	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 15 report
Heat capacity printed: Cp	27.07 J/mol-atom/K	753	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 15 report
Heat capacity printed: Cp	26.05 J/mol-atom/K ± 0.5	763	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 21 report
Heat capacity printed: Cp	25.43 J/mol-atom/K	773	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 16 report
Heat capacity printed: Cp	27 J/mol-atom/K	773	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 16 report
Heat capacity printed: Cp	25.8 J/mol-atom/K ± 0.5	783	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 22 report
Heat capacity printed: Cp	26.85 J/mol-atom/K	793	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 17 report
Heat capacity printed: Cp	25.25 J/mol-atom/K	793	Mg2Si alloy: Si 0.333333	experimental	[2] Schick 2012	Table 2, p. 7, row 17 report
Heat capacity printed: Cp	25.65 J/mol-atom/K ± 0.5	803	Mg2Si alloy: Si 0.333333	experimental	[5] Feufel 1997	Table 5, p. 4, row 23 report

Crystal structure (1)

Crystal structure, Mg–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Lattice a	6.347 Å ± 0.004	298.15	Mg2Si alloy: Mg 0.666667, Si 0.333333	model	[6] Zhou 2010 cites Villars 1991	Table 1, p. 3, row 13 report

Other property (1)

Other property, Mg–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Other printed: 1Hr	-19.7 unspecified ± 1.2	1215		experimental	[2] Schick 2012	p. 7 report	Using the procedure described in Section 3.2.3 we obtained 1Hr = -19.7 ± 1.2 kJ/mol-atoms for the reaction L → Mg2 Si + Si (diamond) from DSC measurements and determined the eutectic temperature at Te = 1215 K.

Sources

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

Xin-Yan Yan, Y. A. Chang, F. Zhang, A thermodynamic analysis of the Mg-Si system, JPE 21, 379-384 (2000). doi:10.1361/105497100770339914
Michael Schick, Bengt Hallstedt, Albert Glensk, Blazej Grabowski, Tilmann Hickel, Milan Hampl et al., Combined ab initio, experimental, and CALPHAD approach for an improved thermodynamic evaluation of the Mg–Si system, Calphad 37, 77-86 (2012). doi:10.1016/j.calphad.2012.02.001
Xiaoming Yuan, Weihua Sun, Yong Du, Dongdong Zhao, Huaming Yang, Thermodynamic modeling of the Mg–Si system with the Kaptay equation for the excess Gibbs energy of the liquid phase, Calphad 33, 673-678 (2009). doi:10.1016/j.calphad.2009.08.004
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.
Harald Feufel, Tilo Gödecke, Hans Leo Lukas, Ferdinand Sommer, Investigation of the Al-Mg-Si system by experiments and thermodynamic calculations, Journal of Alloys and Compounds 247, 31-42 (1997). doi:10.1016/s0925-8388(96)02655-2
Shaoxin Zhou, Libin Liu, Xiaoli Yuan, Feng Zheng, Zhanpeng Jin, Thermodynamic assessment of La–Si and Mg–La–Si systems, Journal of Alloys and Compounds 490, 253-259 (2010). doi:10.1016/j.jallcom.2009.09.171

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}
}