| | Journal (article/letter/editorial) | halos in coal. Higher up in the section pyrite, galena (lead), sphalerite (zinc) and minor tennantite...radioactive crystals in a coal from Seceda, near St. Ulrich, Groeden Valley. (Oilimmersion, magn. 220x...harbour similar types of mineralisation that include galena with lesser amounts of sphalerite, uraninite, very...0.25 mm to 2 mm sized intergrowth of subhedral galena and sphalerite, impregnating the sandstone matrix...tennantite occur as blebs along the boundary of galena and sphalerite crystals and often as a matrix between |
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