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Webster 1913 Edition

Noun.

(Min.)

A rare mineral occurring in tetragonal crystals of a white, yellow, or grayish color and adamantine luster. It is a chlorocarbonate of lead.

phosgenite

(mineralogy) A tetragonal-ditetragonal dipyramidal mineral containing carbon, chlorine, lead, and oxygen.

phosgenite Barthelmy, David (accessed 29 August 2016) Webmineral Mineralogy Database