One of the mysteries of the English language finally explained.
Native lead dioxide, PbO₂, crystallizing in the tetragonal system and occurring as black crystals or black-brown masses.
Mid 19th century; earliest use found in James Nicol (1810–1879), geologist. From the name of K. F. Plattner, German metallurgist who described the mineral + -ite, after German Plattnerit.
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