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氟化铅

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氟化铅
别名 二氟化铅
识别
CAS号 7783-46-2  checkY
PubChem 24549
性质
化学式 PbF2
摩尔质量 245.20 g·mol⁻¹
外观 白色粉末
氣味 無味
密度 8.445 g/cm3 (orthorhombic)
7.750 g/cm3 (cubic)
熔点 824°C
沸点 1293°C
溶解性 0.057 g/100 mL (0 °C)
0.0671 g/100 mL (20 °C)[1]
溶度积Ksp 2.05 x 10-8 (20 °C)
溶解性 可溶於硝酸
不溶於丙酮
结构
晶体结构 萤石(cubic),cF12
空间群 Fm3m, No. 225
危险性
致死量或浓度:
LD50中位剂量
3031 mg/kg(大鼠口服)
相关物质
其他阴离子 氯化铅
溴化铅
碘化鉛
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

氟化铅Lead(II) fluoride)化學式為PbF2,是白色固體。氟化铅有同质异形体,在常溫下為正交晶系(PbCl2型),在高溫下則是立方晶系Fluorite type英语Fluorite structure[2]

製備

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氟化铅可以用多種方式製備,可以將氫氧化鉛碳酸鉛氫氟酸反應,再將生成物中的水蒸發而得[3]

Pb(OH)2 + 2 HF → PbF2 + 2 H2O

氟化铅也可以用在铅鹽溶液中加入氫氟酸,或是在硝酸鉛溶液中加入氟化鉀[4]

2 KF + Pb(NO3)2 → PbF2 + 2 KNO3

也可以用氟化鈉加入乙酸鉛溶液來製備。

2 NaF + Pb(CH3COO)2 → PbF2 + 2 NaCH3COO

用途

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氟化铅可以用在低熔點的玻璃、可以反應紅外線的玻璃塗層、CRT電視的磷光體,以及製造甲基吡啶時的催化劑[3]缪子g-2粒子物理實驗就是用PbF
2
閃爍體探測器配合矽的光電倍增器[5]

參考資料

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  1. ^ NIST-data review 1980
  2. ^ Haines, J.; Léger, J. M.; Schulte, O. High-pressure isosymmetric phase transition in orthorhombic lead fluoride. Physical Review B (American Physical Society (APS)). 1998-04-01, 57 (13): 7551–7555. Bibcode:1998PhRvB..57.7551H. ISSN 0163-1829. doi:10.1103/physrevb.57.7551. 
  3. ^ 3.0 3.1 Carr, Dodd S., Lead Compounds, Ullmann's Encyclopedia of Industrial Chemistry, Weinheim: Wiley-VCH, 2005, doi:10.1002/14356007.a15_249 
  4. ^ Arnold Hollemann, Egon Wiberg, 101st ed., de Gruyter 1995 Berlin; ISBN 3-11-012641-9
  5. ^ Grange, J.; et al. Muon (g−2) Technical Design Report. Jan 27, 2015. Bibcode:2015arXiv150106858G. arXiv:1501.06858可免费查阅.  已忽略未知参数|collaboration= (帮助) Via inSPIRE
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氟化铅
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