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碘化汞银

碘化汞银
IUPAC名
四碘合汞(II)酸银(I)
Silver(I) tetraiodomercurate(II)
别名 碘化汞银
识别
CAS号 7784-03-4  checkY
性质
化学式 Ag2HgI4
摩尔质量 923.94 g·mol−1
外观 鲜黄色晶体[1]
相关物质
其他阳离子 碘化汞钾
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

碘化汞银化学式:Ag2[HgI4]),也称四碘合汞酸银四碘合汞(II)酸银碘汞酸银,为黄色固体,有毒。

制备

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碘化汞银可由碘化汞钾硝酸银反应制备[1]

2 AgNO3 + K2[HgI4] → Ag2[HgI4]↓ + 2 KI

也可以有碘化汞碘化银乙醇中研磨得到。反应物按化学计量比混合,研磨过程中颜色由橙红色变为黄色[1]

物理性质

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碘化汞银为黄色固体,难溶于水,在45~50℃由黄色可逆地变为红色[1]。(有资料则指出碘化汞银在50.7℃有低温的α型转变为高温的β型。[2]

参考资料

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  1. ^ 1.0 1.1 1.2 1.3 《无机化合物合成手册》.第三卷. 日本化学会 编. 曹惠民 译.化学工业出版社. P394. 汞的络合物
  2. ^ 《无机化学丛书》.第六卷 卤素 铜分族 锌分族.科学出版社(1995). 钟兴厚 等. P833. (4) 碘化汞(II)
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碘化汞银
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