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SiSe2 is Silicon Disuphide-like structured and crystallizes in the orthorhombic Ibam space group. The structure is one-dimensional and consists of two SiSe2 ribbons oriented in the (1, 0, 0) direction. Si4+ is bonded to four equivalent Se2- atoms to form edge-sharing SiSe4 tetrahedra. All Si–Se bond lengths are 2.30 Å. Se2- is bonded in a distorted L-shaped geometry to two equivalent Si4+ atoms.
SiSe2 is Silicon Disuphide structured and crystallizes in the orthorhombic Ibam space group. The structure is one-dimensional and consists of two SiSe2 ribbons oriented in the (1, 0, 0) direction. Si4+ is bonded to four equivalent Se2- atoms to form edge-sharing SiSe4 tetrahedra. All Si–Se bond lengths are 2.30 Å. Se2- is bonded in an L-shaped geometry to two equivalent Si4+ atoms.
SiSe2 is Cyanogen Chloride-derived structured and crystallizes in the orthorhombic Ibam space group. The structure is zero-dimensional and consists of four $l^{1}-selanyl(selanylidene)silicon molecules. Si4+ is bonded in a linear geometry to two equivalent Se2- atoms. Both Si–Se bond lengths are 2.09 Å. Se2- is bonded in a single-bond geometry to one Si4+ atom.