1. Pyroxene group Fundamental group of mineralComposition of basalt ~ composition ofpyroxeneAbundantly found from mantle rocks torhyolitesBoth metamorphic and igneous 2.…

1. Inosilicates: single chains- pyroxenes Diopside (001) view blue = Si purple = M1 (Mg) yellow = M2 (Ca) Diopside: CaMg [Si2O6] b Where are the Si-O-Si-O chains?? 2. Inosilicates:…

Mineral Structures Silicates are classified on the basis of Si-O polymerism The culprit: the [SiO4]4- tetrahedron Mineral Structures Silicates are classified on the basis…

Slide 1 Slide 2 Inosilicates: single chains- pyroxenes Diopside (001) view blue = Si purple = M1 (Mg) yellow = M2 (Ca) Diopside: CaMg [Si 2 O 6 ] b a sin  Where are the…

Mineral Structures Silicates are classified on the basis of Si-O polymerism the [SiO4]4- tetrahedron Mineral Structures Silicates are classified on the basis of Si-O polymerism…

What if we had staurolite and andalusite together? What conditions would that indicate? Epidote Group Sorosilicates (paired silicate tetrahedra) Include the mineral Epidote…

Minerlaogi II Average Composition of the Continental Crust Weight Percent Volume Percent Si O O Table 3.4 Ionic Radii of some geologically important ions Fig. 3.8 Silika…

Mineral Structures Silicates are classified on the basis of Si-O polymerism the [SiO4]4- tetrahedron Mineral Structures Silicates are classified on the basis of Si-O polymerism…

Feldspar Group Most abundant mineral in the crust  6 of 7 most common elements Defined through 3 end-members  Albite (Na), Anorthite (Ca), Orthoclase (K) Comprised…

Back to silicate structures: nesosilicates inosilicates tectosilicates phyllosilicates cyclosilictaes sorosilicates Nesosilicates: independent SiO4 tetrahedra Olivine (100)…