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|Section2= }} Ammonium hexachloroplatinate, also known as ammonium chloroplatinate, is the inorganic compound with the formula (NH4)2(). It is a rare example of a soluble platinum(IV) salt that is not hygroscopic. It forms intensely yellow solutions in water. In the presence of 1M NH4Cl, its solubility is only 0.0028 g/100 mL. ==Preparation and structure== The compound consists of separate tetrahedral ammonium cations and octahedral ()2− anions. It is usually generated as a fine yellow precipitate by treating a solution of hexachloroplatinic acid with a solution of an ammonium salt. The complex is so poorly soluble that this step is employed in the isolation of platinum from ores and recycled residues.〔Cotton, S. A. ''Chemistry of Precious Metals'', Chapman and Hall (London): 1997. ISBN 0-7514-0413-6.〕 As analyzed by X-ray crystallography, the salt crystallizes in a cubic motif reminiscent of the fluorite structure. The ()2- centers are octahedral. The NH4+ centers are hydrogen bonded to the chloride ligands.〔 Verde-Gómez, Y.; Alonso-Nuñez, G.; Cervantes, F.; Keer, A. "Aqueous solution reaction to synthesize ammonium hexachloroplatinate and its crystallogrpahic and thermogravimetric characterization" Materials Letters, 2003, volume 57, p 4667-4672. 〕 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「Ammonium hexachloroplatinate」の詳細全文を読む スポンサード リンク
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