Materials Data on K2NbAgS4 by Materials Project
K2NbAgS4 crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. K1+ is bonded in a 8-coordinate geometry to eight equivalent S2- atoms. There are a spread of K–S bond distances ranging from 3.40–3.78 Å. Nb5+ is bonded to four equivalent S2- atoms to form NbS4 tetrahedra that share edges with two equivalent AgS4 tetrahedra. All Nb–S bond lengths are 2.31 Å. Ag1+ is bonded to four equivalent S2- atoms to form AgS4 tetrahedra that share edges with two equivalent NbS4 tetrahedra. All Ag–S bond lengths are 2.57 Å. S2- is bonded in a 1-coordinate geometry to four equivalent K1+, one Nb5+, and one Ag1+ atom.
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