Si crystallizes in the hexagonal P6/m space group. Si(1) is bonded to seven equivalent Si(1) atoms to form a mixture of edge and corner-sharing SiSi7 hexagonal pyramids.
Si crystallizes in the hexagonal P6/m space group. Si(1) is bonded to seven equivalent Si(1) atoms to form a mixture of edge and corner-sharing SiSi7 hexagonal pyramids. There are a spread of Si(1)-Si(1) bond distances ranging from 2.47-2.76 Å.