Materials Data on K2SiAs2 by Materials Project
K2SiAs2 is Hazelwoodite-derived structured and crystallizes in the orthorhombic Ibam space group. The structure is three-dimensional. K1+ is bonded in a 6-coordinate geometry to six equivalent As3- atoms. There are a spread of K–As bond distances ranging from 3.44–3.58 Å. Si4+ is bonded to four equivalent As3- atoms to form distorted edge-sharing SiAs4 tetrahedra. All Si–As bond lengths are 2.41 Å. As3- is bonded in a 8-coordinate geometry to six equivalent K1+ and two equivalent Si4+ atoms.
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