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…

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)…

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…