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Tectosilicates
Name, Crystal System and Formula
15
Geology
Undergraduate 3
02/21/2011
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Term
Quartz
 Definition
hexagonal
SiO2
Term
Cristobalite
 Definition
Tetragonal
SiO2
Term
Opal
 Definition
amorphous
SiO2 nH2O
Term
Microcline
 Definition
triclinic
KAlSi3O8
Term
Orthoclase
 Definition
monoclinic
KAlSi3O8
Term
Albite
 Definition
triclinic
NaAlSi3O8
Term
Anorthite
 Definition
triclinic
CaAl2Si2O8
Term
Leucite
 Definition
tetragonal
KAlSi2O6
Term
Nepheline
 Definition
hexagonal
(Na,K)AlSiO4
Term
Sodalite
 Definition
isometric
Na8(AlSiO4)6Cl2
Term
Marialite
 Definition
tetragonal
Na4(AlSi3O8)3(Cl, CO3, SO4)
Term
Meionite
 Definition
tetragonal
Ca4(Al2Si2O8)3(Cl,CO3,SO4)
Term
Analcime
 Definition
isometric
NaAlSi2O6 H20
Term
Natrolite
 Definition
orthorhombic
Na2(Al2Si3O10)-H20
Term
Stilbite
 Definition
monoclinic
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