The sphalerite framework is favored at 298k by 13kJ/mol, but at 1296K the transition to wurtzite takes place.3 Mining was unmechanized and labor-intensive, with pickmen releasing the ore from the rock, and mine-boys or carusi carrying baskets of ore for the floor, generally through a mile or maybe more of https://edwingxjwg.ziblogs.com/28179910/the-2-minute-rule-for-zinc-sulfide