Documents Mineral Ubahan

MINERAL UBAHAN Allanite in a metaluminous granite. This allanite has concentric zoning resulting from changing mineral composition during successive stages of growth. Allanite…

Documents Tectosilicates

Tectosilicates – (Framework Silicates) Infinite 3-dimensional network of (SiO4)4- or (Si3Al)O81- - (Si2Al2)O82-or (Si3Al)O8 (Si2Al2)O8 building blocks Such minerals account…

Documents minerales (1)

Biotite K2(Mg,Fe)2(OH)2(AlSi3O10) Optical Properties: Biaxial negative; strong pleochroism in brown, reddish brown, and green; extinction is parallel to one excellent cleavage.…