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The 10 Most Abundant Compounds in the Earth's Crust
|
| Compound |
|
Formula |
|
Abundance
percent by weight |
|
Abundance
parts per million by weight |
|
| Silicon dioxide |
|
SiO2 |
|
42.86% |
|
428,600 |
|
| Magnesium oxide |
|
MgO |
|
35.07% |
|
350,700 |
|
| Ferrous oxide |
|
FeO |
|
8.97% |
|
89,700 |
|
| Aluminum oxide |
|
Al2O3 |
|
6.99% |
|
69,900 |
|
| Calcium oxide |
|
CaO |
|
4.37% |
|
43,700 |
|
| Sodium oxide |
|
Na2O |
|
0.45% |
|
4,500 |
|
| Ferric oxide |
|
Fe2O3 |
|
0.36% |
|
3,600 |
|
| Titanium dioxide |
|
TiO2 |
|
0.33% |
|
3,300 |
|
| Chromic oxide |
|
Cr2O3 |
|
0.18% |
|
1,800 |
|
| Manganese dioxide |
|
MnO2 |
|
0.14% |
|
1,400 |
|
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