most likely Mg rich pyroxenen since Fe starts melting earlier from a melt and also mantle rocks that are highly melt depleted contain very high mg rich pyroxenes
Iron-rich pyroxene generally has a higher melting temperature than magnesium-rich pyroxene due to the presence of iron ions, which increases the bonding strength between the pyroxene mineral components, requiring higher temperatures to break these bonds.
Magnesium Oxide Strontium Sulphate has a melting point of 1606°C while Magnesium Oxide has a melting point of 2852°C
Magnesium sulfate doesn't melt; at high temperature MgSO4 is thermally decomposed.
Magnesium has a higher melting point.
Magnesium oxide is non-flammable, but magnesium can burn. Magnesium oxide Melting Point: 2852 °C, 3125 K, 5166 °F Boiling Point: 3600 °C, 3873 K, 6512 °F Magnesium Melting Point: 923 K, 650 °C, 1202 °F Boiling Point: 1363 K, 1091 °C, 1994 °F
Yes, magnesium's melting point is above room temperature. Specifically, magnesium melts at approximately 650 degrees Celsius (1,202 degrees Fahrenheit), which is significantly higher than the average room temperature of around 20-25 degrees Celsius (68-77 degrees Fahrenheit). Therefore, magnesium remains solid at room temperature.
Usually pyroxene crystallizes from magma before orthoclase. Pyroxene has a higher melting point than orthoclase, so it will crystallize first as the magma cools and reaches temperatures where pyroxene can form.
a more dense metal
When magma forms by partial melting, the first minerals to melt are typically those with lower melting points, such as olivine and pyroxene. These minerals are rich in iron and magnesium and tend to crystallize at higher temperatures. As melting progresses, other minerals like amphibole and biotite may also begin to melt, contributing to the composition of the resulting magma. This selective melting is influenced by the mineral's chemistry and the temperature and pressure conditions present in the Earth's crust.
The composition of the magma plays a significant role in determining its melting temperature. Magma with higher silica content tends to have a higher melting temperature. Pressure also affects the melting temperature; higher pressure usually results in a higher melting temperature. Water content can lower the melting temperature of magma by acting as a flux, allowing minerals to melt at lower temperatures.
sodium oxide: 1132oC magnesium oxide: 2852oC
higher