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Vorlesung: Silicatchemie

Vorlage 2.2

2. Insel(Neso)-Silicate (Forts.) 2.2. Granat Zusammensetz. Mg3 Al2 [SiO4 ]3 Fe3 Al2 [SiO4 ]3 Mn3 Al2 [SiO4 ]3 Ca3 Al2 [SiO4 ]3 Mineralname Pyrop Almandin Spessartin Grossular (V: Hessionit (rot), Tsavorit(gr¨n)) u III Ca3 Fe2 [SiO4 ]3 Andradit (V: Melanit (schwarz), Dementoid (gr¨n), Topazoit (gelb)) u Ca3 Cr2 [SiO4 ]3 Uvarovit

2.3. Phenakit Be2 [SiO4 ]

2.4. Zirkon Zr[SiO4 ]

2.5. Inselsilicate mit tetraederfremden Anionen (Nesosubsilicate) Titanit CaTi[6] [SiO4 ]O Datolit CaB[SiO4 ](OH) Topas Al2 [SiO4 ](F, OH)2

Modifikationen von Al2 SiO5 Sillimanit Andalusit

Kyanit

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