Si is Theoretical Carbon Structure-like structured and crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one Si(2), one Si(3), and two equivalent Si(1) atoms to form corner-sharing SiSi4 tetrahedra. In the second Si site, Si(3) is bonded to one Si(1), one Si(3), and two equivalent Si(2) atoms to form corner-sharing SiSi4 tetrahedra. In the third Si site, Si(2) is bonded to one Si(1), one Si(2), and two equivalent Si(3) atoms to form corner-sharing SiSi4 tetrahedra.
Si is Theoretical Carbon Structure-like structured and crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one Si(2), one Si(3), and two equivalent Si(1) atoms to form corner-sharing SiSi4 tetrahedra. The Si(1)-Si(2) bond length is 2.38 Å. The Si(1)-Si(3) bond length is 2.34 Å. Both Si(1)-Si(1) bond lengths are 2.37 Å. In the second Si site, Si(3) is bonded to one Si(1), one Si(3), and two equivalent Si(2) atoms to form corner-sharing SiSi4 tetrahedra. The Si(3)-Si(3) bond length is 2.38 Å. Both Si(3)-Si(2) bond lengths are 2.35 Å. In the third Si site, Si(2) is bonded to one Si(1), one Si(2), and two equivalent Si(3) atoms to form corner-sharing SiSi4 tetrahedra. The Si(2)-Si(2) bond length is 2.35 Å.