6 Subgroups Of Silicate Minerals Based On Crystal Structure

Silicate Subclass

Alternative Name

Minerals

Neso – (or Ortho)

Silicates

Island

Sorosilicates Couplet

Cyclosilicates Ring

Inosilicates Chain

Phyllosilicates Layer

Tectosilicates

(or Tekto-) Framework

Feldspar Group Plagioclase Feldspar CaAl2S12O8 NaAlSi3O8 anorthite (An) albite (Ab) Alkali Feldspar KAlSi3O8 K-feldspar polymorphs: sanidine, orthoclase, microcline (high T low T) Feldspatoid:

4 Main Carbonate Groups Distinguished Based On Structure and Composition

2 Sub-Group Of Sulfates Minerals Based On H2O Content

Groups Minerals Anhydrous Glauberite Na2Ca(SO4)2

Barite Group: Barite CaSO4 Celestite SrSO4 Anglesite PbSO4 Anhydrite CaSO4

Hydrous Antlerite Cu3(OH)SO4 Polyhalite K2Ca2Mg(SO4)2.2H2O Gypsum CaSO4.2H2O Epsomite MgSO4.7H2O Chalcanthite CuSO4.5H2O Alunite KAl3(OH)6(SO4)2