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|Section2= |Section5= |Section7= |Section8= }} Beryllium sulfate normally encountered as the tetrahydrate, BeSO4·4H2O is a white crystalline solid. It was first isolated in 1815 by Jons Jakob Berzelius.〔.〕 Beryllium sulfate may be prepared by treating an aqueous solution of any beryllium salt with sulfuric acid, followed by evaporation of the solution and crystallization. The hydrated product may be converted to anhydrous salt by heating at 400 °C.〔.〕 The tetrahydrate contains a tetrahedral Be(OH2)42+ unit and sulfate anions. The small size of the Be2+ cation determines the number of water molecules that can be coordinated. This contrasts with the analogous magnesium salt, MgSO4·6H2O which contains an octahedral Mg(OH2)62+ unit.〔 Wells A.F. (1984) ''Structural Inorganic Chemistry'' 5th edition Oxford Science Publications ISBN 0-19-855370-6 〕 The anhydrous compound has a structure similar to that of berlinite. The structure contains alternating tetrahedrally coordinated Be and S and each oxygen is 2 coordinate (Be-O-S). The Be-O distance is 156 pm and the S-O distance is 150 pm. A mixture of beryllium and radium sulfate was used as the neutron source in the discovery of nuclear fission. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「beryllium sulfate」の詳細全文を読む スポンサード リンク
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