material

Mg2Si
ID:

mp-1074772

Material Details

Final Magnetic Moment
0.000 μB

Calculated total magnetic moment for the unit cell within the magnetic ordering provided (see below). Typically accurate to the second digit.
Magnetic Ordering
NM
Formation Energy / Atom
0.065 eV

Calculated formation energy from the elements normalized to per atom in the unit cell.

Energy Above Hull / Atom
0.221 eV

The energy of decomposition of this material into the set of most stable materials at this chemical composition, in eV/atom. Stability is tested against all potential chemical combinations that result in the material's composition. For example, a Co2O3 structure would be tested for decomposition against other Co2O3 structures, against Co and O2 mixtures, and against CoO and O2 mixtures.

Density
2.09 g/cm3

The calculated bulk crystalline density, typically underestimated due calculated cell volumes overestimated on average by 3% (+/- 6%)

Decomposes To
Mg2Si
Band Gap
0.000 eV

In general, band gaps computed with common exchange-correlation functionals such as the LDA and GGA are severely underestimated. Typically the disagreement is reported to be ~50% in the literature. Some internal testing by the Materials Project supports these statements; typically, we find that band gaps are underestimated by ~40%. We additionally find that several known insulators are predicted to be metallic.

Space Group

Hermann Mauguin
P1 [1]
Hall
P 1
Point Group
1
Crystal System
triclinic
We have not yet calculated a detailed bandstructure for this material

X-Ray Diffraction

    Select radiation source:
  • Cu
  • Ag
  • Mo
  • Fe

Calculated powder diffraction pattern; note that peak spacings may be affected due to inaccuracies in calculated cell volume, which is typically overestimated on average by 3% (+/- 6%)

Elasticity

A full elastic tensor has not been calculated for this material. Registered users can view statistical-learning-based predictions of this material's bulk and shear moduli.

Once you have registered you can also "vote" for full calculation of this material's elastic properties.

Similar Structures beta feature

Explanation of dissimilarity measure: Documentation.
material dissimilarity Ehull # of elements
Sc3(Ga3Fe)2 (mp-30701) 0.6224 0.045 3
Ce2(SbPd3)3 (mp-18287) 0.6355 0.002 3
BaYbSn3 (mp-571479) 0.5908 0.000 3
Cs5(KPb6)3 (mp-581775) 0.6085 0.006 3
BaCaSn3 (mp-583645) 0.5800 0.000 3
Mg4Si3 (mp-1074546) 0.4578 0.255 2
Mg2Si (mp-1074645) 0.4233 0.173 2
Mg2Si (mp-1074770) 0.4067 0.241 2
Mg5Si6 (mp-1075500) 0.4492 0.215 2
Mg7Si4 (mp-1074855) 0.4346 0.208 2
Rb (mp-656615) 0.7246 0.023 1
Nb (mp-1094120) 0.7366 0.190 1
Up to 5 similar elemental, binary, ternary, quaternary, etc. structures displayed (dissimilarity threshold 0.75). Ehull: energy above hull per atom [eV].

Synthesis Descriptions

10.1007/s10853-006-0538-1
The Al1.0mass%Mg2Si matrix alloy was prepared by melting from 99.99mass% pure aluminum and 99.9mass% pure silicon and magnesium ingots, and the molten alloy was cast into an iron mold. -Al2O3 par [...]
10.1007/s10853-012-6959-0
Magnesium Silicide (Mg2Si) powders were manufactured from commercially available high purity magnesium silicide pieces (99.99%, Alfa Aesar). The raw materials were ground under Argon (Ar) atmosphere [...]
chef hat mixing beaker

Explore more synthesis descriptions for materials of composition Mg2Si.

Text computed by synthesisproject.org.

Calculation Summary

Structure Optimization

Run Type
GGA
Energy Cutoff
520 eV
# of K-points
None
U Values
--
Pseudopotentials
VASP PAW: Mg_pv Si
Final Energy/Atom
-2.8070 eV
Corrected Energy
-33.4001 eV
Uncorrected energy = -33.6841 eV Composition-based energy adjustment (0.071 eV/atom x 4.0 atoms) = 0.2840 eV Corrected energy = -33.4001 eV

Detailed input parameters and outputs for all calculations

Show JSON History Show BibTex Citation Download BibTex Citation
Submitted by

Displaying lattice parameters for primitive cell; note that calculated cell volumes are typically overestimated on average by 3% (+/- 6%). Note the primitive cell may appear less symmetric than the conventional cell representation (see "Structure Type" selector below the 3d structure)