Abstract
The structure of Mg(NH4MS04h . 6H20 has been redetermined in order to assign the hydrogen bonds. The crystals are monoclinic, space group P21/a, with a = 9.324, b = 12.597, c = 6.211 A, and fJ = 107.14°. The structure previously reported by HOFMANN has nearly correct coordinates for the Mg, S, and N atoms, but incorrect coordinates for the oxygen atoms. Three-dimensional x-ray diffraction data were taken with the General Electric goniostat. The structure, including hydrogen atoms, was determined by Fourier and least-squares methods. The magnesium atom is surrounded by an octahedron of water mole* This work was done under the auspices of the U.S. Atomic Energy Com
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