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Hölzel Systematik

4 Oxide

4.D Dioxide

4.DB SiO2Modifications

4.DB.1

Tridymit SiO2 orthorhombisch C2221 222 4.DB.100
Cristobalit SiO2 tetragonal P41212, P43212 422 4.DB.120
Mogánit SiO2 monoklin I2/a 2/m 4.DB.130
Coesit SiO2 monoklin C2/c 2/m 4.DB.140
Stishovit SiO2 tetragonal P42/mnm 4/mmm 4.DB.160
Seifertit SiO2 orthorhombisch 4.DB.180

4.DB.2 SiO2 Clathrates

Melanophlogit 46SiO2 ·6(N2,CO2) ·2(CH4, N2) tetragonal P42/nbc 4/mmm 4.DB.200
Chibait SiO2·n(CH4,C2H6,C3H8,C4H10) {n=0.18 (max)} kubisch Fd3 m3 4.DB.210
Lechatelierit SiO2 amorph 4.DB.220
Carlosbarbosait (Ca0.50.5)(UO2)2(Nb5+Si)O6(OH)2·2H2O orthorhombisch Cmcm mmm 4.DB.250



Mineralsystematik-Übersicht