Materials Data on Na2SO5 by Materials Project
Na2SO5 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Na sites. In the first Na site, Na is bonded in a distorted hexagonal planar geometry to six O atoms. There are two shorter (2.10 Å) and four longer (2.52 Å) Na–O bond lengths. In the second Na site, Na is bonded in a distorted square co-planar geometry to four equivalent O atoms. All Na–O bond lengths are 2.33 Å. S is bonded in a distorted square pyramidal geometry to five O atoms. There is one shorter (1.49 Å) and four longer (2.07 Å) S–O bond length. There are two inequivalent O sites. In the first O site, O is bonded in a distorted trigonal planar geometry to two equivalent Na and one S atom. In the second O site, O is bonded in a 4-coordinate geometry to two Na, one S, and one O atom. The O–O bond length is 1.46 Å.