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crystal data
Cobalt (II) selenate tetrahydrate CoSeO4.4H2O, is monoclinic, space group P21/n. Unit-cell dimensions are a = 6.07 ± 0.01, b = 13.47 ± 0.04, c = 8.08 ± 0.01 Å, and β = 90° 46′ ± 13′. Powder diffraction data are given.