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As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium. It is followed by caesium, iridium and palladium by mass and iridium, gold and platinum by volume. Carbon in the form of diamond can be more expensive than rhodium. Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars.
Magnesium chloride is an inorganic compound with the formula Mg Cl 2. It forms hydrates MgCl 2 · n H 2 O , where n can range from 1 to 12. These salts are colorless or white solids that are highly soluble in water.
Elastic properties describe the reversible deformation (elastic response) of a material to an applied stress.They are a subset of the material properties that provide a quantitative description of the characteristics of a material, like its strength.
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26 Fe iron; use: 340 LNG: 340 WEL: 347 Zhang et al. ... 12.64 CRC: 12.57 LNG: 12.64 WEL: ... Values refer to the enthalpy change in the conversion of liquid to gas at ...
Vapor-deposited magnesium crystals from the Pidgeon process. The Pidgeon process is a practical method for smelting magnesium.The most common method involves the raw material, dolomite being fed into an externally heated reduction tank and then thermally reduced to metallic magnesium using 75% ferrosilicon as a reducing agent in a vacuum. [1]
Rieke metals are usually prepared by a reduction of an anhydrous metal chloride with an alkali metal, in a suitable solvent. [4] [3] For example, Rieke magnesium can be prepared from magnesium chloride with potassium as the reductant: [5] [6] [4] MgCl 2 + 2 K → Mg + 2 KCl. Rieke originally described three general procedures:
The standard Gibbs free energy of formation (G f °) of a compound is the change of Gibbs free energy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 bar of pressure and the specified temperature, usually 298.15 K or 25 °C).