rooseveltite
/ˈrəʊzəˌvɛltʌɪt/Mineralogy
noun
A rare mineral found as a white or grey crust in veinlets of cassiterite in Bolivia, Germany, and elsewhere.
- Rooseveltite is an arsenate of bismuth, BiAsO4. Crystal system: monoclinic..
Origin
1940s; earliest use found in American Mineralogist. From Spanish rooseveltita from the name of Franklin Delano Roosevelt + -ita.
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