Lead dioxide | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-10-20

This is an audio version of the Wikipedia Article:
Lead dioxide

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SUMMARY
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Lead(IV) oxide, commonly called lead dioxide or plumbic oxide or anhydrous plumbic acid (sometimes wrongly called lead peroxide,) is a chemical compound with the formula PbO2.  It is an oxide where lead is in an oxidation state of +4; bond type is predominantly covalent. It is an odorless dark-brown crystalline powder which is nearly insoluble in water. It exists in two crystalline forms. The alpha phase has orthorhombic symmetry; it was first synthesized in 1941 and was identified in nature as a rare mineral scrutinyite in 1988. The more common tetragonal beta phase was first identified as the mineral plattnerite around 1845 and later produced synthetically. Lead dioxide is a strong oxidizing agent which is used in the manufacture of matches, pyrotechnics, dyes and other chemicals. It also has several important applications in electrochemistry, in particular in the positive plates of lead acid batteries.