What is "mimetite"

Mimetite \Mim"e*tite\, n. [Gr. ? an imitator. So called because it resembles pyromorphite.] (Min.) A mineral occurring in pale yellow or brownish hexagonal crystals. It is an arseniate of lead.

n. (context mineralogy English) An arsenate mineral which forms in lead deposits, usually by the oxidation of galena and arsenopyrite.

Mimetite, whose name derives from the Greek Μιμητής mimetes, meaning "imitator", is a lead arsenate chloride mineral (Pb(AsO)Cl) which forms as a secondary mineral in lead deposits, usually by the oxidation of galena and arsenopyrite. The name is a reference to mimetite's resemblance to the mineral pyromorphite. This resemblance is not coincidental, as mimetite forms a mineral series with pyromorphite ( Pb ) and with vanadinite ( Pb ). Notable occurrences are Mapimi, Durango, Mexico and Tsumeb, Namibia.