rathite

rathite
\\ˈräˌtīt, -ˌthīt\ noun (-s)
Etymology: German rathit, from G. vom Rath died 1888 German mineralogist + German -it -ite
: a mineral Pb13As18S40 consisting of a lead arsenic sulfide occurring in dark gray metallic orthorhombic crystals (hardness 3, specific gravity 5.4)

Useful english dictionary. 2012.

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