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二氧化钨

二氧化钨
别名 Tungsten dioxide
识别
CAS号 12036-22-5  checkY
PubChem 82850
SMILES
 
  • O=[W]=O
InChI
 
  • 1S/2O.W
EINECS 234-842-7
性质
化学式 WO2
摩尔质量 215.839 g/mol g·mol⁻¹
外观 青铜色固体
密度 10.8 g/cm3
熔点 1,700 °C(1,970 K)(分解)
溶解性 难溶
磁化率 5.7×10−5 cm3/mol
结构
晶体结构 扭曲的金红石结构(单斜晶系), mP12, 空间群 P21/c, No 14
危险性
闪点 Non-flammable
相关物质
其他阴离子 二硫化钨
二硒化钨
二碲化钨
其他阳离子 二氧化铬
二氧化钼
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

二氧化钨是钨的氧化物,化学式为WO2。它是青铜色的单斜晶体。[1]金红石结构展现出了扭曲的WO6八面体中心,相间的短W–W键为248 pm。[1]

WO2可以由钨粉于900°C还原WO3得到。还原反应的中间体是一个混合价态化合物W18O49

2 WO3 + W → 3 WO2

WO2的单晶可以通过化学转移反应制备,该反应利用了和WO2反应,生成具有挥发性的WO2I2[2]

参考文献

[编辑]
  1. ^ 1.0 1.1 Template:Wells5th
  2. ^ Conroy, L. E.; Ben-Dor, L., Molybdenum(IV) Oxide and Tungsten(IV) Oxides Single-Crystals, Inorg. Synth., Inorganic Syntheses, 1995, 30: 105–07, ISBN 0-471-30508-1, doi:10.1002/9780470132616.ch21 
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二氧化钨
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