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Mineralati

Minerals

Nenadkevichite

nenadkevichite

(Na,☐)8Nb4(Si4O12)2(O,OH)4·8H2O

Nenadkevichite: Mineral information, data and localities.

Nenadkevichite: Mineral information, data and localities. — via www.mindat.org · Source

Overview

Nenadkevichite is a rare silicate mineral containing niobium with the chemical formula (Na,Ca)(Nb,Ti)Si2O7·2H2O. It forms brown to yellow to rose colored orthorhombic dipyramidal crystals with a dull to earthy luster. It has a Mohs hardness of 5 and a specific gravity of 2.86. It was first reported in 1955 from a nepheline syenite pegmatite in the Kola Peninsula. In addition it has been reported from Mont Saint-Hilaire, Canada; the Ilimaussaq complex, Greenland; Windhoek District, Namibia; and Zheltye Vody, Ukraine. It was named after Konstantin Avtonomovich Nenadkevich (1880–1963), Russian mineralogist and geochemist.

Scientific references

  1. Nenadkevichite — Wikidata. https://www.wikidata.org/wiki/Q926315 Link
  2. Nenadkevichite — Wikipedia. https://en.wikipedia.org/wiki/Nenadkevichite Link