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一氟化二银

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一氟化二银
IUPAC名
氟化银(0,I)
英文名 Silver subfluoride
别名 氟化亚银
识别
CAS号 1302-01-8  checkY
性质
化学式 Ag2F
摩尔质量 234.734 g·mol⁻¹
外观 绿色[1]或黄色晶体 [2]
密度 8.6 g/cm3(固态)
熔点 100 °C (分解)[2]
溶解性 遇水水解 [2]
结构
晶体结构 立方
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

一氟化二银是一种无机化合物,化学式为Ag2F。这是一个元素的氧化态不是整数的罕见例子。它可以由金属银与氟化银反应制得:[3]

Ag + AgF → Ag2F

它形成小的晶体并能反射古铜色的光,它也是的良导体。与水作用立即水解产生黑色的银粉沉淀。

晶体结构

[编辑]

Ag2F采用反式CdI2晶体结构,即与碘化镉(CdI2)的结构相同,但是"Ag½+ "占据了I的位置而F占据了Cd2+的位置。[4] 银原子之间的最短间距是299.6pm(金属银中为289pm)。[5]

参考资料

[编辑]
  1. ^ Pierre Villars; Karin Cenzual; Roman Gladyshevskii. Handbook. Walter de Gruyter GmbH & Co KG. 24 July 2017. ISBN 978-3-11-043655-6. 
  2. ^ 2.0 2.1 2.2 CRC Handbook of Chemistry and Physics 97th Edition. 2016-06-24: 4–85. ISBN 1-4987-5428-7 (英语). 
  3. ^ Lee Poyer, Maurice Fielder, Hugh Harrison, Burl E. Bryant "Disilver Fluoride: (Silver “Subfluoride”)" Inorganic Syntheses, 1957, Volume 5, 92–94. doi:10.1002/9780470132364.ch6
  4. ^ A Williams. Neutron powder diffraction study of silver subfluoride. J. Phys.: Condens. Matter. April 1989, 1 (15): 2569–2574. doi:10.1088/0953-8984/1/15/002. 
  5. ^ Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5
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一氟化二银
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