Picromerite mineral

Picromerite mineral

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Credit: DIRK WIERSMA/SCIENCE PHOTO LIBRARY

Caption: Picromerite mineral. The mineral picromerite (or schoenite) is a hydrated potassium magnesium sulphate (K2.Mg(SO4)2.6[H2O]). Its crystal system is monoclinic and it usually occurs as white, opaque earthy or crustal precipitates, deposited as an evaporate in marine environments after prolonged evaporation. More rarely it forms well-faceted, blocky and prismatic crystals, opaque and earthy-white, and sometimes translucent. This sample, from potash mines near Neuhoff Ellers in Germany, is 33 centimetres across.

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Keywords: crystal, crystalline, crystals, cut out, cut outs, cut-out, cut-outs, cutout, cutouts, europe, european, evaporate, geological, geology, german, germany, hydrated potassium magnesium sulphate, mineral, mineralogy, monoclinic, neuhoff ellers, picromerite, prismatic, schoenite, specimen, still life, still-life, studio shot, white background

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