Vinogradovite
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
Vinogradovite
a mineral, hydrated silicate of titanium and sodium (Na5Ti4AlSi6O24·3H2O). Crystallizes in a mono-clinic system, usually forming colorless, thin needlelike and fibrous aggregates, and less frequently prismatic crystals. Its hardness on the mineralogical scale is 4; its density is 2,880 kg/m3. It is widely distributed in massifs of alkaline rock. It was discovered on the Kola Peninsula by E. I. Semenov in 1956 and is named in honor of A. P. Vinogradov.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.