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TRANSITION METAL ORES with rare earths (clockwise) Thorianite (brown) -Thorium uranium oxide (Th,U)O2; Monazite (white) a rare earth phosphate; Rutile -Titanium oxide; Columbite-Tantalite group (gray stripe on white) -Oxides of rare earths (Fe, Mn)(Nb,Ta)2O6; Cobaltite -Cobalt arsenic sulfide.

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TRANSITION METAL ORES with rare earths (clockwise) Thorianite (brown) -Thorium uranium oxide (Th,U)O2; Monazite (white) a rare earth phosphate; Rutile -Titanium oxide; Columbite-Tantalite group (gray stripe on white) -Oxides of rare earths (Fe, Mn)(Nb,Ta)2O6; Cobaltite -Cobalt arsenic sulfide.

Copyright:© 1988 Paul Silverman - Fundamental Photographs

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