Here's a breakdown:
* Forsterite (Mg₂SiO₄): The magnesium-rich endmember of olivine has a density of around 3.22 g/cm³.
* Fayalite (Fe₂SiO₄): The iron-rich endmember of olivine has a density of around 4.17 g/cm³.
* Typical Olivine: Most olivines are a mixture of forsterite and fayalite, and their density falls somewhere between those two values, usually around 3.3 to 3.5 g/cm³.
It's important to note that:
* Pressure and temperature: The density of olivine increases with increasing pressure and temperature.
* Composition: The density of olivine is higher for iron-rich olivines (fayalite) and lower for magnesium-rich olivines (forsterite).
* Alteration: If the olivine has been altered, its density might be lower due to the presence of other minerals.
Therefore, the exact density of olivine can vary depending on the specific sample and its conditions.
