The crystal structure of Tutton's salts. II. Magnesium ammonium sulfate hexahydrate and nickel ammonium sulfate hexahydrate Montgomery, H. ; Lingafelter, E. C. Abstract Publication: Acta Crystallographica Pub Date: November 1964 DOI: 10.1107/S0365110X6400367X Bibcode: 1964AcCry..17.1478M