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Loparite

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loparite [′lō·pə‚rīt]
(mineralogy)
(Ce,Na,Ca)2(Ti,Nb)2O6A brown to black mineral; a variety of perovskite containing alkalies and cerium.

Loparite 

a mineral of chemical composition (Na, Ce, Ca)2-(Ti, Nb)2O6. The principal admixtures are Sr, Y, and Th. Loparite crystallizes in the isometric system, forming primarily small (up to 2-3 mm) crystals, which generally occur as penetration twins. Loparite is structurally similar to perovskite and exhibits no cleavage. It is black, opaque, and has a semimetallic luster. Its hardness is 5.5-6, and its density 4,750-4,890 kg/m3. Loparite occurs in nepheline syenites (sometimes as one of the rock-forming magmatic minerals) and, more rarely, in pegmatites genetically related to nepheline syenites.



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235]U power reactor fuel and the thorium-rich loparite from Kola Peninsula [1] followed.
Introduction Altogether 152 379 metric tons of Lovozero loparite 90 [+ or -] 5% concentrate were brought to the Oil Shale Processing Plant and fully used during the years 1970 to 1991.
As the changes in the production profile will free manpower, the Head of the 3rd Main Technological Directorate and the Deputy Head of the Main Economical Directorate have to reconsider economic specifications of the Sillamae Chemical-Metallurgical PA to be engaged in development of machine building and production of consumer goods, and to guarantee the processing of loparite concentrate as well as to solve ecological problems.
 
 
 
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