Materials Data on Na3CrO6 by Materials Project
NaNa2CrO4O2 crystallizes in the orthorhombic Cmmm space group. The structure is two-dimensional and consists of two sodium molecules; four water molecules; and one Na2CrO4 sheet oriented in the (0, 0, 1) direction. In the Na2CrO4 sheet, Na is bonded in a linear geometry to two equivalent O atoms. Both Na–O bond lengths are 2.17 Å. Cr is bonded in a square co-planar geometry to four equivalent O atoms. All Cr–O bond lengths are 1.98 Å. O is bonded in a 2-coordinate geometry to one Na, one Cr, and one O atom. The O–O bond length is 1.50 Å.
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