Formula: Pb2+2Pb4+O4 multiple oxide
Specific gravity: 9.05
Colour: Red to brownish red
Solubility: Soluble in hydrochloric acid with evolution of Cl2. Decomposed by nitric acid, with brown residue of PbO2
Minium occurs in the oxidised portions of lead ore deposits
(Webmin), formed under extreme oxidising conditions
At the Santa Fé mine, Bolaños, Mun. de Bolaños, Jalisco, Mexico, minium is associated with massicot and cerussite (Dana).
At the Berg Aukas mine, Grootfontein, Otjozondjupa Region, Namibia, minium has been found forming red encrustations on coarse-grained galena (R&M 96.2.132).
At the Långban mine, Långban Ore District, Filipstad, Värmland County, Sweden, minium is associated with native lead (Dana).
At Leadville, Lake county, Colorado, USA, minium is associated with galena, cerussite and iron oxides (Dana).
At the Jay Gould Mine, Wood River Mining District, Blaine county, Idaho, USA, minium is associated with native lead and galena (Dana).
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