The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a mineral of the group of complex fluorides. Its chemical composition is NaCaYF6; the yttrium can be partially replaced by elements of the cerium group, and the fluorine can be partially replaced by chlorine and the (OH) group.

Gagarinite is a rare mineral. It crystallizes in a trigonal system and is characterized by small hexahedral crystals and grainy aggregates. It is colorless or pinkish yellow. Its hardness on the mineralogical scale is 4–4.5; its density is 4,180–4,520 kg/m3. Gagarinite is found in alkaline granites or the pegmatites that are associated with them. It was discovered in 1961 in Kazakhstan and the Tuva ASSR. The mineral is named in honor of Iu. A. Gagarin.


Stepanov, A. V., and E. A. Severov. “Gagarinit—novyi redkozemel’nyi mineral.” Dokl. AN SSSR, 1961, vol. 141, no. 4, pp. 954-57.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
aastast Gagarinite vurstisuguvosale kuni Eesti Vabariigi tekkimiseni kuulunud uhkele lossivaatele huvi ka umbritsev haljastus ja joekaldal ongitsev kalamees oma paadiga.
High concentrations of tantalum, zircon, gagarinite and RE(Y)-fluorite are also reported.