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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Mg6SiGe2 by Materials Project

Mg6Ge2Si crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. there are two inequivalent Mg sites. In the first Mg site, Mg is bonded to two equivalent Ge and two equivalent Si atoms to form a mixture of edge and corner-sharing MgSi2Ge2 tetrahedra. Both Mg–Ge bond lengths are 2.77 Å. Both Mg–Si bond lengths are 2.77 Å. In the second Mg site, Mg is bonded to three equivalent Ge and one Si atom to form a mixture of edge and corner-sharing MgSiGe3 tetrahedra. There are one shorter (2.77 Å) and two longer (2.78 Å) Mg–Ge bond lengths. The Mg–Si bond length is 2.77 Å. Ge is bonded in a body-centered cubic geometry to eight Mg atoms. Si is bonded in a body-centered cubic geometry to eight Mg atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg4SiGe by Materials Project

Mg4GeSi crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are two inequivalent Mg sites. In the first Mg site, Mg is bonded to one Ge and three equivalent Si atoms to form a mixture of edge and corner-sharing MgSi3Ge tetrahedra. The Mg–Ge bond length is 2.77 Å. All Mg–Si bond lengths are 2.77 Å. In the second Mg site, Mg is bonded to three equivalent Ge and one Si atom to form a mixture of edge and corner-sharing MgSiGe3 tetrahedra. All Mg–Ge bond lengths are 2.77 Å. The Mg–Si bond length is 2.76 Å. Ge is bonded in a body-centered cubic geometry to eight Mg atoms. Si is bonded in a body-centered cubic geometry to eight Mg atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg4SiGe by Materials Project

Mg4GeSi crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Mg is bonded to two equivalent Ge and two equivalent Si atoms to form a mixture of edge and corner-sharing MgSi2Ge2 tetrahedra. Both Mg–Ge bond lengths are 2.77 Å. Both Mg–Si bond lengths are 2.77 Å. Ge is bonded in a body-centered cubic geometry to eight equivalent Mg atoms. Si is bonded in a body-centered cubic geometry to eight equivalent Mg atoms.

36 MATERIALS SCIENCE↗