pitchblende
pitch·blende / ˈpichˌblend/ • n. a form of the mineral uraninite occurring in brown or black pitchlike masses.
pitchblende
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Uraninite , uraninite (pitchblende) Mineral, UO2; sp. gr. from 8.5 when massive to 10 for unaltered crystals; hardness 5–6; cubic; it is brownish-black or grey-b… Lanthanide Series , The lanthanides are the chemical elements found in Row 6 of the periodic table between Groups 3 and 4. They follow lanthanum (La), element #57, which… Colored People (south Africa) , Cape Coloreds
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