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Massicot is one of the natural mineral forms of lead(II) oxide, PbO. Massicot is the orthorhombic dimorph of the tetragonal form of lead oxide, litharge. It forms soft (Mohs hardness of 2) yellow to reddish-yellow, earthy, scaley masses which are very dense, with a specific gravity of 9.64.

It was first described in 1841 for an occurrence in Stolberg, near Aachen, Germany. The name is French for lead oxide.


  • Palache, C., H. Berman, and C. Frondel (1944) Dana’s system of mineralogy, (7th edition), v. I, 516–517
  • Webmineral data
  • Mindat with location data
  • Mineral data publishing - PDF

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Massicot". A list of authors is available in Wikipedia.
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