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Agrinierite

Named for engineer of the Mineralogy Laboratory of the French Atomic Energy Commission in Paris, Henri Agrinier. It is a rare mineral that can be found only at the Margnac mine in Compreignac in Haute-Vienne, France, where it occurs in an oxidized uranium deposits in association with uranophane and gummite. Agrinierite is highly radioactive.

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

Aheylite

Named in honor of Allen V. Heyl, an economic geologist with the United States Geological Suvey. Aheylite is a rare mineral that can be found at the type locality at the Huanuni mine in the Oruro Department of Bolivia, at Bali Lo in the Ashburton Downs of Western Australia, Australia, and possibly at the Les Montmins mine in Auvergne, France. At the type locality, Aheylite is found as a hydrothermal mineral in the base metal tin deposit in association with variscite, sphalerite, vivianite, wavellite, cassiterite, pyrite, and quartz.

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

Ahlfeldite

Named for Friedrich E. Ahlfeld, a German-Bolivian mining engineer and mineralogist. Ahlfeldite is a rare mineral that can be found only in Bolivia at the Virgen de Surumi mine, its type locality, and at the El Dragon mine, both in the Potosi Department. Ahlfeldite is an “alteration product of nickel-bearing selenides and sulfides” in association with perroseite, chalcomenite, olsacherite, cerussite, anglesite, lepidocrocite, and goethite.

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

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