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|Section2= |Section3= |Section7= |Section8= }} Lead(II) oxide, also called lead monoxide, is the inorganic compound with the molecular formula PbO. PbO occurs in two polymorphs, one litharge having a tetragonal crystal structure and the other massicot having an orthorhombic crystal structure. Modern applications for PbO are mostly in lead-based industrial glass and industrial ceramics, including computer components. ==Preparation== PbO may be prepared by heating lead metal in air at approx. 600 °C. At this temperature it is also the end product of oxidation of other lead oxides in air:〔N.N. Greenwood, A. Earnshaw, "Chemistry of Elements", 2nd edition, Butterworth-Heinemann, 1997.〕 :PbO2 –(293 °C)→ Pb12O19 –(351 °C)→ Pb12O17 –(375 °C)→ Pb3O4 –(605 °C)→ PbO Thermal decomposition of lead(II) nitrate or lead carbonate also results in the PbO formation: :2 Pb(NO3)2 → 2 PbO + 4 NO2 + O2 :PbCO3 → PbO + CO2 PbO is produced on a large scale as an intermediate product in refining raw lead ores into metallic lead. The usual lead ore is galena (lead(II) sulfide). At high temperature (1000 °C) the sulfide is converted to the oxide: : 2 PbS + 3 O2 → 2PbO + 2SO2 Metallic lead is obtained by reducing the PbO with carbon monoxide at around 1200 °C:.〔(Lead Processing @ Universalium.academic.ru ). Alt address: (Lead processing @ Enwiki.net ).〕 : PbO + CO → Pb + CO2 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) oxide」の詳細全文を読む スポンサード リンク
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