L1
/
5
CH3041
2 :1 CLAY STRUCTURES
Muscovite
[
KAl
3
Si
3
O
10
(OH)
2
]
2
(
Illite a 2
o
mineral
also has this structure
)
•
Smectite
[
M
0
(Al
2
)(Si
4
)O
10
(OH)
2
]
2
eg.montmorillonite
K
+
x+y
(Al
2-x
Mg
x
) (Si
4-y
Al
y
)O
10
(OH)
2