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Becquerelite

Named after Antoine Henri Becquerel, the French physicist who discovered radioactivity in 1896. Becquerelite is a rare mineral that occurs as a weathering product of uraninite in oxidized uranium deposits and can also be found, albeit rarely, in pegmatites. Localities include in the Democratic Republic of the Congo, Austria, England, France, the United States, Canada, and Australia, among a few others. Becquerelite is highly radioactive.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/becquerelite.pdf

Belovite-(Ce)

Named to honor Nikolai Vasil’evich Belov, who was a crystallographer and academician and former Head of the Cystallography and Crystallochemistry Department at Moscow Lomonosov State University in Moscow, Russia. Beloveite-Ce is a secondary mineral in pegmatites in localities in the Lovozero and Khibiny massifs in Russia. The only other locality for Belovite is at Gordon Butte in Montana, USA.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/belovite-(Ce).pdf

Belyankinite

Dmitry Stepanovich Belyankin is the namesake of Belyankinite as a formerly prominent mineralogist ant petrographer. The type and only locality for Belankinite is at the Medvzh’ya Berloga pegmatite in the Lovozero Massif in the Kola Peninsula in Russia. There, it occurs as inclusions “in aegirine and microcline, in nepheline syenite pegmatite in an alkalic massif, in part probably as a replacement of murmanite.” Other associated minerals include zeolites, eudialyte, lorenzenite, lamprophyllite, and titanium oxides.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/belyankinite.pdf

Bementite

Named for American mineral collector Clarence Sweet Bement. It is an uncommon but widespread mineral that occurs in the United States, England, Sweden, Russia, Japan, and South Africa among several others. Bementite can be found in layers parallel to veins of calcite and intergrown with other manganese minerals. Associated minerals include calcite, willemite, hausmanntie, jacobsite, braunite, alleghanyite, baryte, grossular, johannsenite, rhodochrosite, and inesite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/bementite.pdf

Benitoite

Named after the type locality at the Dallas Gem mine in San Benito County in California, USA. Other localities for Benitoite include additional USA localities, as well as in Japan, Australia, and the Czech Republic. At the type locality it can be found in natrolite veins that cut glaucophane schist in a serpentine body, and at the Japanese locality in a magnesio-riebeckite-quartz-phlogopite-albite dike that cuts serpentinite. Benitoite has a blue fluorescence under short wave ultraviolet light and an intense blue cathodoluminescence.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/benitoite.pdf

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