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User:Cavie78

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Picture of the day

Pyromorphite

Pyromorphite is a mineral species composed of lead chlorophosphate: Pb5(PO4)3Cl, sometimes occurring in sufficient abundance to be mined as an ore of lead. First distinguished chemically by Martin Heinrich Klaproth in 1784, it was named pyromorphite by Johann Friedrich Ludwig Hausmann in 1813. It is usually green, yellow or brown in color, with a resinous lustre. Crystals are common and have the form of a hexagonal prism terminated by the basal planes, sometimes combined with narrow faces of a hexagonal pyramid. Other forms include crystals with a barrel-like curvature and globular or reniform masses. Pyromorphite is part of the apatite group of minerals and bears a close resemblance physically and chemically with two other minerals, mimetite and vanadinite. This focus-stacked photograph, merged from 26 separate images, shows a sample of pyromorphite extracted from the Resuperferolitica Mine in Santa Eufemia, in the Spanish province of Córdoba. The sample measures 3.5 cm × 3.0 cm × 1.5 cm (1.38 in × 1.18 in × 0.59 in).

Photograph credit: David Ifar


Completed (Good articles)

Awards

This editor is a
Veteran Editor
and is entitled to display this
Iron Editor Star.
For Outstanding Work on writing Well Researched and Well Presented articles.
Presented by SilkTork
The Working Man's Barnstar
For reviewing 6 good article nominations during the April 2010 GAN backlog elimination drive, I hereby present you The Working Man's Barnstar. Nice job! –MuZemike 23:13, 5 May 2010 (UTC)