Si is Clathrate-like structured and crystallizes in the hexagonal P6/mmm space group. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded to one Si(3), one Si(4), and two equivalent Si(2) atoms to form corner-sharing SiSi4 tetrahedra. In the second Si site, Si(5) is bonded to two equivalent Si(2) and two equivalent Si(5) atoms to form corner-sharing SiSi4 tetrahedra. In the third Si site, Si(2) is bonded to one Si(2), one Si(5), and two equivalent Si(1) atoms to form corner-sharing SiSi4 tetrahedra. In the fourth Si site, Si(3) is bonded to two equivalent Si(1) and two equivalent Si(3) atoms to form corner-sharing SiSi4 tetrahedra. In the fifth Si site, Si(4) is bonded to one Si(4) and three equivalent Si(1) atoms to form corner-sharing SiSi4 tetrahedra.
Si is Clathrate-like structured and crystallizes in the hexagonal P6/mmm space group. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded to one Si(3), one Si(4), and two equivalent Si(2) atoms to form corner-sharing SiSi4 tetrahedra. The Si(1)-Si(3) bond length is 2.37 Å. The Si(1)-Si(4) bond length is 2.32 Å. Both Si(1)-Si(2) bond lengths are 2.35 Å. In the second Si site, Si(5) is bonded to two equivalent Si(2) and two equivalent Si(5) atoms to form corner-sharing SiSi4 tetrahedra. Both Si(5)-Si(2) bond lengths are 2.39 Å. Both Si(5)-Si(5) bond lengths are 2.46 Å. In the third Si site, Si(2) is bonded to one Si(2), one Si(5), and two equivalent Si(1) atoms to form corner-sharing SiSi4 tetrahedra. The Si(2)-Si(2) bond length is 2.44 Å. In the fourth Si site, Si(3) is bonded to two equivalent Si(1) and two equivalent Si(3) atoms to form corner-sharing SiSi4 tetrahedra. Both Si(3)-Si(3) bond lengths are 2.33 Å. In the fifth Si site, Si(4) is bonded to one Si(4) and three equivalent Si(1) atoms to form corner-sharing SiSi4 tetrahedra. The Si(4)-Si(4) bond length is 2.32 Å.