Barsanovite

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Barsanovite

a mineral; chemical formula (Na, Ca)₉(Fe, Mn)₂ (Zr, Nb)₂ [Si₃O₉]₄. It usually contains admixtures of rare-earth metals and strontium. It belongs to the eudialite group but crystallizes in a monoclinic system. It forms grainy-crystalline masses ranging in color from reddish-brown to yellow-green. Its hardness on the mineralogical scale is 4.8–5.0; its density is 3,070 kg/m³. It was discovered in the feldspar-nepheline pegmatite veins of the Khibiny alkali complex.

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