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Manganoneptunite

Named for the abundance of manganese and as a chemical variant of the neptunite structure. Manganoneptunite is a rare mineral that occurs in only a few countries worldwide including in Russia, the United States, Canada, Malawi, Morocco and Namibia. It is found as a late-forming segregation mineral in nearly all rock types at its Russian localities in the Lovozero massif in Russia.

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

Manganonordite-(Ce)

Named for being the Mn2+ analogue of the mineral nordite-Ce. Found only at the co-type localities at the Kedykverpakhk Mountain and the Karnasurt Mountain, both in the Lovozero massif of the Kola Peninsula of Russia. Occurs as colorless to pale brown, thin, platy crystals in rosettes or spherulites in sodalite syenites and ussingite veins.

Ref. Minerals and their Localities, Bernard, J.H. and Hyršl, J. (2004)

Manganvesuvianite

Named for the relationship to vesuvianite and for the dominance of manganese in the chemical composition. A rare mineral found in South Africa at the Wessels mine as crystals in veins and vugs, and at the N’Chwanning II mine, the type locality, as a rock forming mineral in association with grossular and xonotlite. Also found in the Harstigen mine in Varmland, Sweden. Manganvesuvianite forms as red to lilac and black prismatic crystals.

Ref. Minerals and their Localities, Bernard, J.H. and Hyršl, J. (2004)

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