Source: McDonough W.F., Sun S.-s. The composition of the Earth, Chemical Geology 120 (1995) 223-253.
| oxide | units | value |
|---|---|---|
| SiO2 | pt | 45.16 |
| TiO2 | pt | 0.217 |
| Al2O3 | pt | 3.97 |
| Cr2O3 | pt | 0.46 |
| MnO | pt | 0.13 |
| FeO | pt | 7.82 |
| NiO | pt | 0.27 |
| MgO | pt | 38.3 |
| CaO | pt | 3.5 |
| Na2O | pt | 0.33 |
| K2O | pt | 0.031 |