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Demesmaekerite

Named to honor Gaston Demesmaeker, a Belgian mining geologist and Director of the Geological Department at the Union Miniere du Haut Katanga. Demedmaekerite is a rare mineral that occurs in loxidized selenium-bearing copper-cobalt deposits. It can be found at its type locality in the Musonoi mine near Kolwezi in the Katanga Copper Crescent in the Democratic Republic of the Congo, and at Zalesi in Moravia in the Czech Republic. Demesmaekerite is fairly radioactive.

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

Denisovite

Named after Aleksander Petrovich Denisov, a Russian investigator of minerals specializing in X-ray investigations at the Kola Scientific Center. Denisovite can be found only in Russia at its co-type localities on Eveslogchorr Mountain and Yukspor Mountain in the Khibiny massif on the Kola Peninsula, and in the Murunskii massif in the Eastern-Siberian region. It occurs in “nepheline syenite in a differentiated alkalic massif.”

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

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