-Consist of tightly bonded oxygen, Si, and Al atoms, but they do not have ordered, crystalline sheets.
-These group of colloids are highly charged, and are formed from volcanic ash.
-Have high positive and negative charge.
-Have high water holding capacity but not sticky when wet.
-High P fixing ability especially in acidic conditions.
-Examples = Allophane and imogolite.
jim items answered the question on October 19, 2018 at 09:58
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a-
b-
c-
d-
e-
f-
ff-
g-
h-
i-
j-
jj-
k-
m-
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o-
p-
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w-
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y-
z-
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