For lead, the primary ore is galena or lead (II) sulfide (PbS). Galena is a naturally occurring semiconductor, crystals of which lent their name to the early “crystal radios” which used a lump ...
Mined in Derbyshire and smelted during a period of Roman occupationGalena, the ore of lead, was mined in Derbyshire from the Bronze Age. Romans worked lead ore in Derbyshire where it was smelted ...
CORVALLIS, Ore. -- — Michael Rataj had 28 points to lead Oregon State to an 89-79 victory over Portland on Monday. Rataj also added five rebounds and five assists for the Beavers (11-3 ...
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