Si3As crystallizes in the hexagonal P6_3/mmc space group. Si(1) is bonded in a 2-coordinate geometry to four equivalent As(1) atoms. As(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of distorted corner and face-sharing AsSi12 cuboctahedra.
Si3As crystallizes in the hexagonal P6_3/mmc space group. Si(1) is bonded in a 2-coordinate geometry to four equivalent As(1) atoms. There are two shorter (2.72 Å) and two longer (2.99 Å) Si(1)-As(1) bond lengths. As(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of distorted corner and face-sharing AsSi12 cuboctahedra.