Rare earth oxide tracers

Rare earth oxide tracers

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This image is part of the feature Race for Rare Earth Metals

Credit: PEGGY GREB/US DEPARTMENT OF AGRICULTURE/SCIENCE PHOTO LIBRARY

Caption: Rare earth oxide tracers. When used in hydrology research, these tracers (which can be detected in trace amounts) can be used to determine which parts of a water shed are eroding. Clockwise from upper centre, the elements whose oxides are present here are: praseodymium, cerium, lanthanum, neodymium, samarium, and gadolinium.

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Keywords: 6, cerium oxide, chemical, chemistry, colour, colours, compound, detection, elements, erosion, gadolinium oxide, geographical, heap, heaps, hydrology, lanthanum oxide, neodymium oxide, oxide, oxides, physical geography, pile, piles, praseodymium oxide, rare earth, rare earth element, rare earth oxide tracers, ree, research, samarium oxide, six, soil erosion dynamics, soil science, still life, still-life, studio, test, tests, tracer, tracers, water shed, watershed

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