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What is the percentage of oxygen in the volume and not weight of the earth's crust?
Wiki User
∙ 11y ago
I cannot give you an exact figure but my guess is that it is > 90 %. It strongly depends on the minerals present and on the coordination of the elements within these minerals, how large the ionic volumina are. Furthermore pressure and temperature are of importance.
Oxygen is present as an anion in almost all minerals in the crust (volumetrically speaking) and has a much larger ionic volume (~0.0082 nm³) than the other very abundant elements (all of them are cations). E.g. usual ionic volumina of silicon are 0.00026 to 0.00052 nm³ and ionic volumina of aluminium are typically 0.00052 to 0.0014 nm³.
Because in all common silikates minerals > 50 % of the ions are oxygen, its volume fraction on the Earth's crust is very large.
Wiki User
∙ 11y ago
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