Erlichmanite

Erlichmanite is the naturally occurring mineral form of osmium sulfide (OsS2). It is grey with a metallic luster, hardness around 5, and specific gravity about 9.[1] It is found in noble metal placer deposits.[2] Named for Jozef Erlichman, electron microprobe analyst at the NASA Ames Research Center.[3]

References
  1. https://www.mindat.org/min-1401.html
  2. http://www.webmineral.com/data/Erlichmanite.shtml
  3. http://www.handbookofmineralogy.org/pdfs/erlichmanite.pdf
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