Exam 1 Soil Chemical Properties: Mineralogy Flashcards
1
Q
The Big 8
A
O 46% Si 28% Al 8% Fe 5% Ca 4% Na 2% Mg 2% K 2%
2
Q
Less Stable Oxides (soluble)
A
K, Na, Ca, Mg, Fe
3
Q
Stable Oxides (insoluble)
A
Fe, Al, Si
4
Q
Tectosilicates “framework silicates”
A
Quartz and Feldspars
5
Q
Phyllosilicates “layered silicates”
A
Kaolinite, Mica/Illite, and Vermiculite/Smectite
6
Q
Non-silicate
A
Iron oxides/ Aluminum oxides
7
Q
Primary Minerals
A
Quartz, feldspar, mica
8
Q
Secondary Minerals
A
Illite, Vermiculite/Smectite, kaolinite, and Fe oxides/ Al oxides
9
Q
Dominates sand/silt fractions
A
Quartz and Feldspar
10
Q
Dominant clay fraction
A
Mica/Illite, vermiculite/smectite, kaolinite, Fe/Al Oxides
11
Q
Quartz elements
A
Si, O
12
Q
Feldspar elements
A
Si, Al, Ca, Na, O
13
Q
Mica/illite elements
A
Si, Al, O Interlayer= K+
14
Q
Vermiculite/Smectite elements
A
Si, Al, O Interlayer= h2o, cations
15
Q
Kaolinite elements
A
Si, Al, O No interlayer, H- bonded
