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|Section2= |Section3= |Section4= |Section5= |Section6= }} Beryllium hydroxide, Be(OH)2, is an amphoteric hydroxide, dissolving in both acids and alkalis. Industrially, it is produced as a by-product in the extraction of beryllium metal from the ores beryl and bertrandite.〔Jessica Elzea Kogel, Nikhil C. Trivedi, James M. Barker and Stanley T. Krukowski, 2006, Industrial Minerals & Rocks: Commodities, Markets, and Uses, 7th edition, SME, ISBN 0-87335-233-5〕 When alkali is added to beryllium salt solutions the α-form (a gel) is formed. If this left to stand or boiled, the rhombic β-form precipitates.〔Mary Eagleson, 1994, Concise encyclopedia chemistry, Walter de Gruyter, ISBN 3-11-011451-8〕 This has the same structure as zinc hydroxide, Zn(OH)2, with tetrahedral beryllium centers. ==Reactions== With alkalis it dissolves to form the tetrahydroxidoberyllate(2-) anion.〔Egon Wiberg, Arnold Frederick Holleman (2001) ''Inorganic Chemistry'', Elsevier ISBN 0-12-352651-5〕 With sodium hydroxide solution: :2NaOH(aq) + Be(OH)2(s) → Na2Be(OH)4(aq) With acids, beryllium salts are formed.〔 For example, with sulfuric acid, H2SO4, beryllium sulfate is formed: :Be(OH)2 + H2SO4 → BeSO4 + 2H2O Beryllium hydroxide dehydrates at 400 °C to form the soluble white powder, beryllium oxide:〔 :Be(OH)2 → BeO + H2O Further heating at higher temperature produces acid insoluble BeO.〔 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 hydroxide」の詳細全文を読む スポンサード リンク
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