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Dana 8 Classification

75 Tektosilicate Minerals

75.02 Tektosilicates Tectosilicate Si Tetrahedral Frameworks SiO2 with H2O and organics

75.02.01

Opal SiO2·nH2O 75.02.01.01

75.02.02 Melanophlogite Polymorphs
Melanophlogite 46SiO2 ·6(N2,CO2) ·2(CH4, N2) tetragonal P42/nbc 4/mmm 75.02.02.01

75.02.04

Silhydrite Si3O6·H2O orthorhombisch 75.02.04.01



Mineralsystematik-Übersicht