Formula : (Na,H3O)15(Ca,Mn2+)6Fe3+2Zr3[H0-3Si3O9)2(Si9O27)2SiO]Cl · 2-3H2O
System: trigonal Hardness:5 Rarity:rare
Strunz id:VIII/F.32-10 -
SILICATES
Name origin: Named for the IKRAN institute (Institut Kristallografii Rossiyskoy Akademii Nauk), Moscow, Russia.
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