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Compounds in Crust of Earth
 


4
The 10 Most Abundant Compounds in the Earth's Crust
Compound
Formula
Abundance by weight
silicon dioxide
SiO2
42.86%
magnesium oxide
MgO
35.07%
iron(II) oxide
FeO
8.97%
aluminum oxide
Al2O3
6.99%
calcium oxide
CaO
4.37%
sodium oxide
Na2O
0.45%
iron(III) oxide
Fe2O3
0.36%
titanium dioxide
TiO2
0.33%
chromium(III) oxide
Cr2O3
0.18%
manganese(IV) oxide
MnO2
0.14%
Total
99.72%

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