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|Section2= |Section3= |Section7= |Section8= }} Lead(II) iodide (PbI2) or plumbous iodide is a bright yellow solid at room temperature, that reversibly becomes brick red by heating. In its crystalline form it is used as a detector material for high energy photons including x-rays and gamma rays. Lead iodide is toxic due to its lead content. In the nineteenth century it was used as an artists' pigment under the name ''Iodine Yellow'', but it was too unstable to be useful.〔Salter, Thomas W., ''Field’s Chromatography: or Treatise on Colours and Pigments as Used by Artists By George Field. An entirely new and practical edition revised, rewritten and brought down to the present time'', 1869〕 ==Preparation== Lead iodide can be obtained as a yellow precipitate by reacting solutions of lead(II) nitrate and potassium iodide: :Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) The yellow precipitate dissolves in an excess of KI solution, forming a colourless solution of the tetraiodoplumbate:〔Satya Prakash, Advanced Inorganic Chemistry Volume 1, 2006, ISBN 81-219-0263-0〕 :Pb(I2)(s) + 2KI(aq) ⇄ K2PbI4(aq) 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「Lead(II) iodide」の詳細全文を読む スポンサード リンク
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