Mineralogy Database

Megacyclite Mineral Data

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General Megacyclite Information

Help on Chemical  Formula: Chemical Formula: Na8KSi9O18(OH)9•19(H2O)
Help on Composition: Composition: Molecular Weight = 1,250.12 gm
   Potassium   3.13 %  K     3.77 % K2O
   Sodium     14.71 %  Na   19.83 % Na2O
   Silicon    20.22 %  Si   43.26 % SiO2
   Hydrogen    3.71 %  H    33.14 % H2O
   Oxygen     58.23 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na8KSi9O18(OH)9•18.5(H2O)
Help on Environment: Environment: In unweathered ultra-alkalic pegmatites in an alkalic massif. Turns white on exposure to air.
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: On Mt. Rasvumchorr, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for large and cyclical, with reference to the large ringlike groups of silica tetrahedra in the structure.
Help on Name Pronunciation: Name Pronunciation: Megacyclite + Pronunciation Say MEGACYCLITE
Help on Synonym: Synonym: IMA1991-015