Ringkasan Krismin UAS
description
Transcript of Ringkasan Krismin UAS
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