Nenadkevichite

Nenadkevichite is a rare silicate mineral containing niobium with 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.

Additional recommended knowledge

Weighing the right way

Correct Test Weight Handling Guide: 12 Practical Tips

Daily Sensitivity Test

It was first reported in 1955 from a nepheline syenite pegmatite in the Kola Peninsula. In addition it has been reported from Mt Saint-Hilaire, Canada; the Ilimaussaq complex, Greenland; Windhoek District, Namibia; and Zheltye Vody, Ukraine. It was named after Konstantin A. Nenadkevich, Russian mineralogist and geochemist.

References

• Webmineral data
• Mindat with location data