Materials Data on NaZnSiO4 by Materials Project
NaZnSiO4 is Covellite-derived structured and crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Na is bonded to five O atoms to form NaO5 trigonal bipyramids that share corners with three equivalent ZnO4 tetrahedra, corners with five equivalent SiO4 tetrahedra, and corners with four equivalent NaO5 trigonal bipyramids. There are a spread of Na–O bond distances ranging from 2.37–2.54 Å. Zn is bonded to four O atoms to form ZnO4 tetrahedra that share corners with two equivalent ZnO4 tetrahedra, corners with four equivalent SiO4 tetrahedra, and corners with three equivalent NaO5 trigonal bipyramids. There are a spread of Zn–O bond distances ranging from 1.94–2.01 Å. Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with four equivalent ZnO4 tetrahedra and corners with five equivalent NaO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.63–1.66 Å. There are four inequivalent O sites. In the first O site, O is bonded to two equivalent Na, one Zn, and one Si atom to form distorted corner-sharing ONa2ZnSi tetrahedra. In the second O site, O is bonded in a distorted trigonal planar geometry to one Na, one Zn, and one Si atom. In the third O site, O is bonded in a trigonal planar geometry to two equivalent Zn and one Si atom. In the fourth O site, O is bonded in a distorted trigonal non-coplanar geometry to two equivalent Na and one Si atom.