Mg–Si phases

6 phases (tier A 5, liquid 1); 4 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: interactive registry · full JSON · Mg–Si system page · Markdown · field reference

Phases of the Mg–Si system (6)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
DIAMOND_A4 phase:mg-si:a4-diamond	C (diamond) · A4 · cF8 · Fd-3m (227)	tier A: standard phase name	stable in 7 of 7 calculated diagram(s): 300–2499.44 K, x(Si) 0.99974–1	21	7
BCC_A2 phase:mg-si:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 7 calculated diagram(s)	0	7
FCC_A1 phase:mg-si:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 7 calculated diagram(s)	0	7
HCP_A3 phase:mg-si:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 7 of 7 calculated diagram(s): 300–930.75 K, x(Si) 0–6e-05	31	7
LIQUID phase:mg-si:liquid	liquid	liquid	stable in 7 of 7 calculated diagram(s): 910.24–2500 K, x(Si) 0–1	105	7
MG2SI_C1 phase:mg-si:mg2si-c1	CaF2 · C1 · cF12 · Fm-3m (225)	tier A: standard phase name	stable in 7 of 7 calculated diagram(s): 300–1360.67 K, x(Si) 0.33333–0.33333	124	7

DIAMOND_A4 (Mg–Si)

Id: phase:mg-si:a4-diamond; status assigned
Structure: C (diamond) · A4 · cF8 · Fd-3m (227); type st:a4-c-diamond-cf8; tier A: standard phase name; confidence high
Stability: stable in 7 of 7 calculated diagram(s): 300–2499.44 K, x(Si) 0.99974–1
Literature: 21 values (21 accepted) from 3 papers
Interactive: phase registry entry

Names (12): corpus: corpus:phase:mg-si:a4-diamond, corpus:phase:mg-si:diamond-a4
paper: paper:10.1016/j.calphad.2009.08.004:Si-diamond, paper:10.1016/j.calphad.2012.02.001:Si (dia), paper:10.1361/105497100770339914:(Si)
tdb: tdb:MgSi-00Yan-LB.tdb:DIAMOND_A4, tdb:MgSi-04Kev.tdb:DIAMOND_A4, tdb:MgSi-09Yua.tdb:DIAMOND_A4, tdb:MgSi-12Sch.tdb:DIAMOND_A4, tdb:MgSi-16Lia.tdb:DIAMOND_A4, tdb:MgSi-86Lud.tdb:DIAMOND_A4, tdb:MgSi-97Feu.tdb:DIAMOND_A4

TDB models of DIAMOND_A4 (7): PHASE and CONSTITUENT statements as written

MgSi-00Yan-LB.tdb: DIAMOND_A4, type code %, sha256 7347483183dd69b2…

46: PHASE DIAMOND_A4 % 1 1 !
47: CONST DIAMOND_A4 : SI : !

MgSi-04Kev.tdb: DIAMOND_A4, type code %, sha256 8a16b2608533d041…

41: PHASE DIAMOND_A4 % 1 1 !
42: CONST DIAMOND_A4 : SI : !

MgSi-09Yua.tdb: DIAMOND_A4, type code %, sha256 d51ae3480eef32b8…

47: PHASE DIAMOND_A4 % 1 1 !
48: CONST DIAMOND_A4 : SI : !

MgSi-12Sch.tdb: DIAMOND_A4, type code %, sha256 fb5bcd7ddaaab551…

41: PHASE DIAMOND_A4 % 1 1 !
42: CONST DIAMOND_A4 : SI : !

MgSi-16Lia.tdb: DIAMOND_A4, type code %, sha256 01f8dc8d22e0e37f…

42: PHASE DIAMOND_A4 % 1 1 !
43: CONST DIAMOND_A4 : MG SI% : !

MgSi-86Lud.tdb: DIAMOND_A4, type code %, sha256 9be7ae691d0061a0…

49: PHASE DIAMOND_A4 % 1 1 !
50: CONST DIAMOND_A4 : SI : !

MgSi-97Feu.tdb: DIAMOND_A4, type code %, sha256 ebffb15d1bb1ae71…

46: PHASE DIAMOND_A4 % 1 1 !
47: CONST DIAMOND_A4 : SI : !

Example references (10 of 10; assessments first):

doi:10.1361/105497100770339914 Xin-Yan Yan, Y. A. Chang, F. Zhang, A thermodynamic analysis of the Mg-Si system, JPE 21, 379-384 (2000).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2012.02.001 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2009.08.004 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).
assessment that models this phase; reports values for this phase
doi:10.1016/S0925-8388(96)02655-2 H. Feufel, T. Godecke, H.L. Lukas, F. Sommer, J. Alloys Compd., 247, 31-42(1997).
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2016.06.003 S.-M. Liang, P. Wang, R. Schmid-Fetzer, Calphad, 54, 82-96(2016).
assessment that models this phase
doi:10.1361/15477030418569 D. Kevorkov, R. Schmid-Fetzer, F. Zhang, Phase Equilibria and Thermodynamics of the Mg-Si-Li System and Remodeling of the Mg-Si System, Journal of Phase Equilibria & Diffusion 25, 140-151 (2004).
assessment that models this phase
doi:10.1515/ijmr-1986-770503 D. Luedecke, Z. Metallkd., 77, 278-83(1986).
assessment that models this phase
doi:10.1002/zaac.19090610105 R. Vogel, Metallographische Mitteilungen aus dem Institut für physikalische Chemie der Universität Göttingen. LXX. Über Magnesium‐Siliciumlegierungen, Z. Anorg. Chem. 61, 46-53 (1909).
cited as the source of values for this phase
doi:10.1002/zaac.19261510102 Lothar Wöhler, O. Schliephake, Die Silicide des Calciums und Magnesiums, Z. Anorg. Allg. Chem. 151, 1-20 (1926).
cited as the source of values for this phase
doi:10.1016/0364-5916(81)90016-x P. Dorner, H. Krieg, H.L. Lukas, R. Muller, and G. Petzow: CALPHAD, 1981, vol. 1, pp. 41-55.
cited as the source of values for this phase

BCC_A2 (Mg–Si)

Id: phase:mg-si: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 7 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:mg-si:bcc-a2
tdb: tdb:MgSi-00Yan-LB.tdb:BCC_A2, tdb:MgSi-04Kev.tdb:BCC_A2, tdb:MgSi-09Yua.tdb:BCC_A2, tdb:MgSi-12Sch.tdb:BCC_A2, tdb:MgSi-16Lia.tdb:BCC_A2, tdb:MgSi-86Lud.tdb:BCC_A2, tdb:MgSi-97Feu.tdb:BCC_A2

TDB models of BCC_A2 (7): PHASE and CONSTITUENT statements as written

MgSi-00Yan-LB.tdb: BCC_A2, type code %B, sha256 7347483183dd69b2…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : MG SI : VA : !

MgSi-04Kev.tdb: BCC_A2, type code %B, sha256 8a16b2608533d041…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : MG SI : VA : !

MgSi-09Yua.tdb: BCC_A2, type code %B, sha256 d51ae3480eef32b8…

37: PHASE BCC_A2 %B 2 1 3 !
38: CONST BCC_A2 : MG SI : VA : !

MgSi-12Sch.tdb: BCC_A2, type code %B, sha256 fb5bcd7ddaaab551…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : MG SI : VA : !

MgSi-16Lia.tdb: BCC_A2, type code %B, sha256 01f8dc8d22e0e37f…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : MG SI : VA : !

MgSi-86Lud.tdb: BCC_A2, type code %B, sha256 9be7ae691d0061a0…

39: PHASE BCC_A2 %B 2 1 3 !
40: CONST BCC_A2 : MG SI : VA : !

MgSi-97Feu.tdb: BCC_A2, type code %B, sha256 ebffb15d1bb1ae71…

36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : MG SI : VA : !

Example references (7 of 7; assessments first):

doi:10.1016/j.calphad.2009.08.004 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).
assessment that models this phase
doi:10.1016/j.calphad.2012.02.001 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).
assessment that models this phase
doi:10.1016/j.calphad.2016.06.003 S.-M. Liang, P. Wang, R. Schmid-Fetzer, Calphad, 54, 82-96(2016).
assessment that models this phase
doi:10.1016/S0925-8388(96)02655-2 H. Feufel, T. Godecke, H.L. Lukas, F. Sommer, J. Alloys Compd., 247, 31-42(1997).
assessment that models this phase
doi:10.1361/105497100770339914 Xin-Yan Yan, Y. A. Chang, F. Zhang, A thermodynamic analysis of the Mg-Si system, JPE 21, 379-384 (2000).
assessment that models this phase
doi:10.1361/15477030418569 D. Kevorkov, R. Schmid-Fetzer, F. Zhang, Phase Equilibria and Thermodynamics of the Mg-Si-Li System and Remodeling of the Mg-Si System, Journal of Phase Equilibria & Diffusion 25, 140-151 (2004).
assessment that models this phase
doi:10.1515/ijmr-1986-770503 D. Luedecke, Z. Metallkd., 77, 278-83(1986).
assessment that models this phase

FCC_A1 (Mg–Si)

Id: phase:mg-si:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: not stable in 7 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:mg-si:fcc-a1
tdb: tdb:MgSi-00Yan-LB.tdb:FCC_A1, tdb:MgSi-04Kev.tdb:FCC_A1, tdb:MgSi-09Yua.tdb:FCC_A1, tdb:MgSi-12Sch.tdb:FCC_A1, tdb:MgSi-16Lia.tdb:FCC_A1, tdb:MgSi-86Lud.tdb:FCC_A1, tdb:MgSi-97Feu.tdb:FCC_A1

TDB models of FCC_A1 (7): PHASE and CONSTITUENT statements as written

MgSi-00Yan-LB.tdb: FCC_A1, type code %A, sha256 7347483183dd69b2…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : MG SI : VA : !

MgSi-04Kev.tdb: FCC_A1, type code %A, sha256 8a16b2608533d041…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : MG SI : VA : !

MgSi-09Yua.tdb: FCC_A1, type code %A, sha256 d51ae3480eef32b8…

32: PHASE FCC_A1 %A 2 1 1 !
33: CONST FCC_A1 : MG SI : VA : !

MgSi-12Sch.tdb: FCC_A1, type code %A, sha256 fb5bcd7ddaaab551…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : MG SI : VA : !

MgSi-16Lia.tdb: FCC_A1, type code %A, sha256 01f8dc8d22e0e37f…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : MG SI : VA : !

MgSi-86Lud.tdb: FCC_A1, type code %A, sha256 9be7ae691d0061a0…

34: PHASE FCC_A1 %A 2 1 1 !
35: CONST FCC_A1 : MG SI : VA : !

MgSi-97Feu.tdb: FCC_A1, type code %A, sha256 ebffb15d1bb1ae71…

31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : MG SI : VA : !

Example references (7 of 7; assessments first):

doi:10.1016/j.calphad.2009.08.004 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).
assessment that models this phase
doi:10.1016/j.calphad.2012.02.001 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).
assessment that models this phase
doi:10.1016/j.calphad.2016.06.003 S.-M. Liang, P. Wang, R. Schmid-Fetzer, Calphad, 54, 82-96(2016).
assessment that models this phase
doi:10.1016/S0925-8388(96)02655-2 H. Feufel, T. Godecke, H.L. Lukas, F. Sommer, J. Alloys Compd., 247, 31-42(1997).
assessment that models this phase
doi:10.1361/105497100770339914 Xin-Yan Yan, Y. A. Chang, F. Zhang, A thermodynamic analysis of the Mg-Si system, JPE 21, 379-384 (2000).
assessment that models this phase
doi:10.1361/15477030418569 D. Kevorkov, R. Schmid-Fetzer, F. Zhang, Phase Equilibria and Thermodynamics of the Mg-Si-Li System and Remodeling of the Mg-Si System, Journal of Phase Equilibria & Diffusion 25, 140-151 (2004).
assessment that models this phase
doi:10.1515/ijmr-1986-770503 D. Luedecke, Z. Metallkd., 77, 278-83(1986).
assessment that models this phase

HCP_A3 (Mg–Si)

Id: phase:mg-si: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 7 of 7 calculated diagram(s): 300–930.75 K, x(Si) 0–6e-05
Literature: 31 values (30 accepted) from 3 papers
Interactive: phase registry entry

Names (11): corpus: corpus:phase:mg-si:hcp-a3
paper: paper:10.1016/j.calphad.2009.08.004:(Mg)-hcp, paper:10.1016/j.calphad.2012.02.001:Mg (hcp), paper:10.1361/105497100770339914:(Mg)
tdb: tdb:MgSi-00Yan-LB.tdb:HCP_A3, tdb:MgSi-04Kev.tdb:HCP_A3, tdb:MgSi-09Yua.tdb:HCP_A3, tdb:MgSi-12Sch.tdb:HCP_A3, tdb:MgSi-16Lia.tdb:HCP_A3, tdb:MgSi-86Lud.tdb:HCP_A3, tdb:MgSi-97Feu.tdb:HCP_A3

TDB models of HCP_A3 (7): PHASE and CONSTITUENT statements as written

MgSi-00Yan-LB.tdb: HCP_A3, type code %, sha256 7347483183dd69b2…

41: PHASE HCP_A3 % 2 1 0.5 !
42: CONST HCP_A3 : MG% SI : VA : !

MgSi-04Kev.tdb: HCP_A3, type code %, sha256 8a16b2608533d041…

36: PHASE HCP_A3 % 2 1 0.5 !
37: CONST HCP_A3 : MG% SI : VA : !

MgSi-09Yua.tdb: HCP_A3, type code %, sha256 d51ae3480eef32b8…

42: PHASE HCP_A3 % 2 1 0.5 !
43: CONST HCP_A3 : MG% SI : VA : !

MgSi-12Sch.tdb: HCP_A3, type code %, sha256 fb5bcd7ddaaab551…

36: PHASE HCP_A3 % 2 1 0.5 !
37: CONST HCP_A3 : MG% SI : VA : !

MgSi-16Lia.tdb: HCP_A3, type code %, sha256 01f8dc8d22e0e37f…

37: PHASE HCP_A3 % 2 1 0.5 !
38: CONST HCP_A3 : MG% SI : VA : !

MgSi-86Lud.tdb: HCP_A3, type code %, sha256 9be7ae691d0061a0…

44: PHASE HCP_A3 % 2 1 0.5 !
45: CONST HCP_A3 : MG% SI : VA : !

MgSi-97Feu.tdb: HCP_A3, type code %, sha256 ebffb15d1bb1ae71…

41: PHASE HCP_A3 % 2 1 0.5 !
42: CONST HCP_A3 : MG% SI : VA : !

Example references (10 of 10; assessments first):

doi:10.1361/105497100770339914 Xin-Yan Yan, Y. A. Chang, F. Zhang, A thermodynamic analysis of the Mg-Si system, JPE 21, 379-384 (2000).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2009.08.004 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2012.02.001 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).
assessment that models this phase; reports values for this phase
doi:10.1016/S0925-8388(96)02655-2 H. Feufel, T. Godecke, H.L. Lukas, F. Sommer, J. Alloys Compd., 247, 31-42(1997).
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2016.06.003 S.-M. Liang, P. Wang, R. Schmid-Fetzer, Calphad, 54, 82-96(2016).
assessment that models this phase
doi:10.1361/15477030418569 D. Kevorkov, R. Schmid-Fetzer, F. Zhang, Phase Equilibria and Thermodynamics of the Mg-Si-Li System and Remodeling of the Mg-Si System, Journal of Phase Equilibria & Diffusion 25, 140-151 (2004).
assessment that models this phase
doi:10.1515/ijmr-1986-770503 D. Luedecke, Z. Metallkd., 77, 278-83(1986).
assessment that models this phase
doi:10.1002/zaac.19090610105 R. Vogel, Metallographische Mitteilungen aus dem Institut für physikalische Chemie der Universität Göttingen. LXX. Über Magnesium‐Siliciumlegierungen, Z. Anorg. Chem. 61, 46-53 (1909).
cited as the source of values for this phase
doi:10.1002/zaac.19261510102 Lothar Wöhler, O. Schliephake, Die Silicide des Calciums und Magnesiums, Z. Anorg. Allg. Chem. 151, 1-20 (1926).
cited as the source of values for this phase
doi:10.1016/0364-5916(81)90016-x P. Dorner, H. Krieg, H.L. Lukas, R. Muller, and G. Petzow: CALPHAD, 1981, vol. 1, pp. 41-55.
cited as the source of values for this phase

LIQUID (Mg–Si)

Id: phase:mg-si:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 7 of 7 calculated diagram(s): 910.24–2500 K, x(Si) 0–1
Literature: 105 values (103 accepted) from 5 papers
Interactive: phase registry entry

Names (15): corpus: corpus:phase:mg-si:liquid
paper: paper:10.1016/j.calphad.2009.08.004:L, paper:10.1016/j.calphad.2012.02.001:L, paper:10.1016/j.calphad.2012.02.001:Liquid, paper:10.1016/j.calphad.2012.02.001:liquid, paper:10.1016/s0925-8388(96)02655-2:liquid, paper:10.1361/105497100770339914:L, paper:sha256-85fd53a1a176b694:Liquid
tdb: tdb:MgSi-00Yan-LB.tdb:LIQUID, tdb:MgSi-04Kev.tdb:LIQUID, tdb:MgSi-09Yua.tdb:LIQUID, tdb:MgSi-12Sch.tdb:LIQUID, tdb:MgSi-16Lia.tdb:LIQUID, tdb:MgSi-86Lud.tdb:LIQUID, tdb:MgSi-97Feu.tdb:LIQUID

TDB models of LIQUID (7): PHASE and CONSTITUENT statements as written

MgSi-00Yan-LB.tdb: LIQUID, type code %, sha256 7347483183dd69b2…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : MG SI : !

MgSi-04Kev.tdb: LIQUID, type code %, sha256 8a16b2608533d041…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : MG SI : !

MgSi-09Yua.tdb: LIQUID, type code %, sha256 d51ae3480eef32b8…

27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : MG SI : !

MgSi-12Sch.tdb: LIQUID, type code %, sha256 fb5bcd7ddaaab551…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : MG SI : !

MgSi-16Lia.tdb: LIQUID, type code %, sha256 01f8dc8d22e0e37f…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : MG SI : !

MgSi-86Lud.tdb: LIQUID, type code %, sha256 9be7ae691d0061a0…

29: PHASE LIQUID:L % 1 1 !
30: CONST LIQUID:L : MG SI : !

MgSi-97Feu.tdb: LIQUID, type code %, sha256 ebffb15d1bb1ae71…

26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : MG SI : !

Example references (10 of 11; assessments first):

doi:10.1361/105497100770339914 Xin-Yan Yan, Y. A. Chang, F. Zhang, A thermodynamic analysis of the Mg-Si system, JPE 21, 379-384 (2000).
assessment that models this phase; reports values for this phase
doi:10.1016/S0925-8388(96)02655-2 H. Feufel, T. Godecke, H.L. Lukas, F. Sommer, J. Alloys Compd., 247, 31-42(1997).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2012.02.001 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2009.08.004 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2016.06.003 S.-M. Liang, P. Wang, R. Schmid-Fetzer, Calphad, 54, 82-96(2016).
assessment that models this phase
doi:10.1361/15477030418569 D. Kevorkov, R. Schmid-Fetzer, F. Zhang, Phase Equilibria and Thermodynamics of the Mg-Si-Li System and Remodeling of the Mg-Si System, Journal of Phase Equilibria & Diffusion 25, 140-151 (2004).
assessment that models this phase
doi:10.1515/ijmr-1986-770503 D. Luedecke, Z. Metallkd., 77, 278-83(1986).
assessment that models this phase
doi:10.1002/zaac.19090610105 R. Vogel, Metallographische Mitteilungen aus dem Institut für physikalische Chemie der Universität Göttingen. LXX. Über Magnesium‐Siliciumlegierungen, Z. Anorg. Chem. 61, 46-53 (1909).
cited as the source of values for this phase
doi:10.1002/zaac.19261510102 Lothar Wöhler, O. Schliephake, Die Silicide des Calciums und Magnesiums, Z. Anorg. Allg. Chem. 151, 1-20 (1926).
cited as the source of values for this phase
doi:10.1016/0364-5916(81)90016-x P. Dorner, H. Krieg, H.L. Lukas, R. Muller, and G. Petzow: CALPHAD, 1981, vol. 1, pp. 41-55.
cited as the source of values for this phase

MG2SI_C1 (Mg–Si)

Id: phase:mg-si:mg2si-c1; status assigned
Structure: CaF2 · C1 · cF12 · Fm-3m (225); type st:c1-caf2-cf12; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaacap and oqmd-17649, space group 225
Stoichiometry: Mg 0.6667, Si 0.3333
Stability: stable in 7 of 7 calculated diagram(s): 300–1360.67 K, x(Si) 0.33333–0.33333
Literature: 124 values (122 accepted) from 3 papers
Interactive: phase registry entry

Names (13): corpus: corpus:phase:mg-si:mg2si-c1
mp: mp:mp-aaaaacap
oqmd: oqmd:oqmd-17649
paper: paper:10.1016/j.calphad.2009.08.004:Mg2Si, paper:10.1016/j.calphad.2012.02.001:Mg2Si, paper:10.1361/105497100770339914:Mg2Si
tdb: tdb:MgSi-00Yan-LB.tdb:MG2SI_C1, tdb:MgSi-04Kev.tdb:MG2SI_C1, tdb:MgSi-09Yua.tdb:MG2SI_C1, tdb:MgSi-12Sch.tdb:MG2SI_C1, tdb:MgSi-16Lia.tdb:MG2SI_C1, tdb:MgSi-86Lud.tdb:MG2SI_C1, tdb:MgSi-97Feu.tdb:MG2SI_C1

TDB models of MG2SI_C1 (7): PHASE and CONSTITUENT statements as written

MgSi-00Yan-LB.tdb: MG2SI_C1, type code %, sha256 7347483183dd69b2…

51: PHASE MG2SI_C1 % 2 2 1 !
52: CONST MG2SI_C1 : MG : SI : !

MgSi-04Kev.tdb: MG2SI_C1, type code %, sha256 8a16b2608533d041…

46: PHASE MG2SI_C1 % 2 2 1 !
47: CONST MG2SI_C1 : MG : SI : !

MgSi-09Yua.tdb: MG2SI_C1, type code %, sha256 d51ae3480eef32b8…

52: PHASE MG2SI_C1 % 2 2 1 !
53: CONST MG2SI_C1 : MG : SI : !

MgSi-12Sch.tdb: MG2SI_C1, type code %, sha256 fb5bcd7ddaaab551…

46: PHASE MG2SI_C1 % 2 2 1 !
47: CONST MG2SI_C1 : MG : SI : !

MgSi-16Lia.tdb: MG2SI_C1, type code %, sha256 01f8dc8d22e0e37f…

47: PHASE MG2SI_C1 % 2 2 1 !
48: CONST MG2SI_C1 : MG : SI : !

MgSi-86Lud.tdb: MG2SI_C1, type code %, sha256 9be7ae691d0061a0…

54: PHASE MG2SI_C1 % 2 0.66666667 0.33333333 !
55: CONST MG2SI_C1 : MG : SI : !

MgSi-97Feu.tdb: MG2SI_C1, type code %, sha256 ebffb15d1bb1ae71…

51: PHASE MG2SI_C1 % 2 2 1 !
52: CONST MG2SI_C1 : MG : SI : !

Example references (10 of 14; assessments first):

doi:10.1016/j.calphad.2012.02.001 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).
assessment that models this phase; reports values for this phase
doi:10.1361/105497100770339914 Xin-Yan Yan, Y. A. Chang, F. Zhang, A thermodynamic analysis of the Mg-Si system, JPE 21, 379-384 (2000).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2009.08.004 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).
assessment that models this phase; reports values for this phase
doi:10.1016/S0925-8388(96)02655-2 H. Feufel, T. Godecke, H.L. Lukas, F. Sommer, J. Alloys Compd., 247, 31-42(1997).
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2016.06.003 S.-M. Liang, P. Wang, R. Schmid-Fetzer, Calphad, 54, 82-96(2016).
assessment that models this phase
doi:10.1361/15477030418569 D. Kevorkov, R. Schmid-Fetzer, F. Zhang, Phase Equilibria and Thermodynamics of the Mg-Si-Li System and Remodeling of the Mg-Si System, Journal of Phase Equilibria & Diffusion 25, 140-151 (2004).
assessment that models this phase
doi:10.1515/ijmr-1986-770503 D. Luedecke, Z. Metallkd., 77, 278-83(1986).
assessment that models this phase
doi:10.1002/zaac.19090610105 R. Vogel, Metallographische Mitteilungen aus dem Institut für physikalische Chemie der Universität Göttingen. LXX. Über Magnesium‐Siliciumlegierungen, Z. Anorg. Chem. 61, 46-53 (1909).
cited as the source of values for this phase
doi:10.1002/zaac.19261510102 Lothar Wöhler, O. Schliephake, Die Silicide des Calciums und Magnesiums, Z. Anorg. Allg. Chem. 151, 1-20 (1926).
cited as the source of values for this phase
doi:10.1016/0364-5916(81)90016-x P. Dorner, H. Krieg, H.L. Lukas, R. Muller, and G. Petzow: CALPHAD, 1981, vol. 1, pp. 41-55.
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). doi: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). doi: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.

@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}
}