The sphalerite structure is favored at 298k by 13kJ/mol, but at 1296K the transition to wurtzite occurs.3 Mining was unmechanized and labor-intensive, with pickmen liberating the ore through the rock, and mine-boys or carusi carrying baskets of ore into the area, normally by way of a mile or maybe more https://infrared-zinc-sulfide16036.blogzet.com/top-guidelines-of-zinc-sulfide-41316966