Chapter: Civil : Engineering Geology : Mineralogy

Felspar Group

It is most abundant of all minerals. It is used for making more than 50% by weight crust of earth It is non-metallic and silicate minerals

FELSPAR GROUP

It is most abundant of all minerals

It is used for making more than 50% by weight crust of earth It is non-metallic and silicate minerals

CHEMICAL COMPOSITION:

Potash feldspar KAlSi3 O8

Soda-lime feldspar NaAlSi3O8 (OR) CaAl2Si2O8

VARITIES OF POTASH

FELSPAR: Orthoclase

Sanidine

Microcline

SODA LIME FELSPAR:

Albite

Oligoclase

Andecine

Amarthitie

Labrodorie

GENERAL PHYSICAL:

CRYSTAL SYSTEM: monoclinic,triclinic

HABIT: Tabular (crystalline)

CLEAVAGE: Perfect( 2- directional)

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Civil : Engineering Geology : Mineralogy : Felspar Group |