MgSi2 crystallizes in the triclinic P-1 space group. Mg(1) is bonded in a 14-coordinate geometry to three equivalent Mg(1), five equivalent Si(2), and six equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 10-coordinate geometry to six equivalent Mg(1), one Si(1), and three equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to five equivalent Mg(1), one Si(2), and three equivalent Si(1) atoms.
MgSi2 crystallizes in the triclinic P-1 space group. Mg(1) is bonded in a 14-coordinate geometry to three equivalent Mg(1), five equivalent Si(2), and six equivalent Si(1) atoms. There are a spread of Mg(1)-Mg(1) bond distances ranging from 3.07-3.28 Å. There are a spread of Mg(1)-Si(2) bond distances ranging from 2.83-3.15 Å. There are a spread of Mg(1)-Si(1) bond distances ranging from 2.87-3.16 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 10-coordinate geometry to six equivalent Mg(1), one Si(1), and three equivalent Si(2) atoms. The Si(1)-Si(1) bond length is 2.52 Å. There are a spread of Si(1)-Si(2) bond distances ranging from 2.51-2.55 Å. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to five equivalent Mg(1), one Si(2), and three equivalent Si(1) atoms. The Si(2)-Si(2) bond length is 2.47 Å.