* Chemical composition: Biotite is a complex mineral with varying amounts of iron, magnesium, potassium, and other elements. These variations affect its melting point.
* Pressure: Increased pressure raises the melting point of biotite.
* Presence of water: Water can lower the melting point of biotite.
However, a general range for the melting point of biotite under atmospheric pressure is:
* 950 - 1050 °C (1742 - 1922 °F)
It's important to note that this is just an estimated range. The actual melting point of a specific biotite sample will vary based on its specific composition and the surrounding conditions.
