Risorite samples

Risorite samples

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Credit: DIRK WIERSMA/SCIENCE PHOTO LIBRARY

Caption: Risorite samples. This is a titanium-bearing variety of the mineral fergusonite, which is an oxide of yttrium and niobium, but can contain several additional rare earth elements as well. It is a lustrous black to brown, or greyish black, and usually has an amorphous appearance. These samples are from Gjerstad, Norway, and measure 50 mm wide.

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Keywords: chemical, chemistry, close-up, detail, earth science, european, fergusonite, geographical, geography, geological, geology, host rock, mineral, mineralogy, nature, niobium, norwegian, rare earth mineral, risorite, sample, samples, scandinavian, specimen, specimens, still life, still-life, titanium, titanium-bearing, variety, yttrium

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