silicates Flashcards
types of silicates
1
Q
nesosilicates-
A
no shared corners- (mg,Fe2 )SIO4 - contains the basic island unit of sio4-
2
Q
A
“Double island” silicates
Shared vertex- [Si2O7]6-
SiO₄ tetrahedra share one oxygen atom-
Ca 2(Al,Fe3+)Al2Si 3O 12(OH)
3
Q
Inosilicates:
A
Chain silicates- Si:O 1:3 [Si2O6]4-
Pyroxene
(Mg,Fe)SiO3
4
Q
Cyclosilicates
A
Rings of linked [SiO4]4-
tetrahedra
Beryl
Be3Al2[Si6O18]
Aluminosilicate
Emerald, aquamarine
5
Q
A
