Rietveld refinement of the crystal structure of α -CoSO 4

The crystal structure of α -CoSO 4 has been refined by the Rietveld method from X-ray powder diffraction data. The structure is orthorhombic, space group Pnma, a = 8.6127(4), b = 6.7058(3), c = 4.7399(2) Å, V = 273.75(3) Å 3 . Final R B = 2.41%, R P = 5.24%, R WP =6.66%, R WP (expected) =5.74% (WP =weighted profile). The structure consists of edge-sharing octahedral chains parallel to [010] interconnected by SO 4 tetrahedra.