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Melting is a fundamental process that governs the phase transitions between solids and liquids. It is of interest to the fields of condensed matter physics, high pressure physics and geophysical and planetary sciences . The melting point is the temperature at which there is enough energy in the form of heat to break the electrostatic attractions between the particles changing their state from solid to liquid.
Magnesium fluoride is an inorganic compound with the formula MgF2. It is a white crystalline salt that has many useful industrial and commercial applications. It is an excellent optical material for light transmission and has a very wide transparency region from visible wavelengths to the infrared. It is also used for polarizing corrective lenses of eyeglasses, to reduce the glare from sunlight by selecting the orientation of light waves passing through them. This is done by absorbing and transmitting light with different directions of incidence, so that only the desired wavelengths are reflected and the others are transmitted through the lens.
The melting point of mgf2 is derived from the differences in the electronic configuration of the magnesium and fluorine atoms. Magnesium has two valence electrons, while fluorine has seven. Magnesium donates one of its valence electrons to each fluorine atom, thus forming an ionic bond with them. This causes a strong electrostatic attraction between the magnesium and fluoride ions, which increases the melting point of this compound. It is also important to note that the size of the ions plays less of a role in the melting point than their charges since larger ions are more attracted to each other.