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.

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 A. Nenadkevich, Russian mineralogist and geochemist.

References

• Webmineral data
• Mindat with location data

This article about a specific silicate mineral is a stub. You can help Wikipedia by expanding it.v · Categories: Calcium minerals Sodium minerals Niobium minerals Titanium minerals Cyclosilicates Orthorhombic minerals Silicate mineral stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем написать курсовую Bob Widlar Fiji Muslim League Look at other dictionaries: Nenadkevichite — Catégorie IX : silicates[1] Nena …   Wikipédia en Français nenadkevichite — noun A rare silicate mineral containing niobium …   Wiktionary nenadkevichite — …   Useful english dictionary Ненадкевичит — Формула (Na, K, Ca)2–x(Nb, Ti)2 (O, OH)2[Si4O12] • 4H2O Примесь …   Википедия List of minerals N-R (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …   Wikipedia Rutile — Wine red rutile crystals from Binn Valley, Switzerland (Size: 2.0 x 1.6 x 0.8 cm) General Category Oxide minerals …   Wikipedia Ilmenite — from Miask, Ilmen Mts, Chelyabinsk Oblast , Southern Urals, Urals Region, Russia. 4.5 x 4.3 x 1.5 cm General Category Oxide mineral …   Wikipedia List of minerals — This is a List of minerals for which there are Wikipedia articles. Mineral variety names and mineraloids are to be listed after the valid minerals for each letter.For a complete listing (about 4,000) of all mineral names: List of minerals… …   Wikipedia Andradite — single crystal (4.2cm) Diakon, Nioro du Sahel Circle, Kayes Region, Mali General Category Garnet group …   Wikipedia Aenigmatite — General Category Silicate mineral Chemical formula Na2Fe2+5TiSi6O20 Strunz classification 9.DH.40 Cr …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”