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About 8% by weight of cathode ray tubes is strontium oxide, which has been the major use of strontium since 1970. [3] [4] Color televisions and other devices containing color cathode ray tubes sold in the United States are required by law to use strontium in the faceplate to block X-ray emission (these X-ray emitting TVs are no longer in production).
Strontium peroxide is an inorganic compound with the formula Sr O 2 that exists in both anhydrous and octahydrate form, both of which are white solids. The anhydrous form adopts a structure similar to that of calcium carbide .
The metal is produced commercially by reducing strontium oxide with aluminium. The strontium is distilled from the mixture. [56] Strontium metal can also be prepared on a small scale by electrolysis of a solution of strontium chloride in molten potassium chloride: [12] Sr 2+ + 2 e − → Sr 2 Cl − → Cl 2 + 2 e −
Strontium nitride, Sr 3 N 2, is produced by burning strontium metal in air (resulting in a mixture with strontium oxide) or in nitrogen. Like other metal nitrides , it reacts with water to give strontium hydroxide and ammonia:
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
For ionic compounds made of molecular cations and/or anions, there may also be ion-dipole and dipole-dipole interactions if either molecule has a molecular dipole moment. The theoretical treatments described below are focused on compounds made of atomic cations and anions, and neglect contributions to the internal energy of the lattice from ...
Three different crystallographic forms exist. Other binary silicon nitrogen compounds have been proposed (SiN, Si 2 N 3, Si 3 N) [86] and other SiN compounds have been investigated at cryogenic temperatures (SiN 2, Si(N 2) 2, SiNNSi). [87] Silicon tetraazide is an unstable compound that easily detonates. The phase diagram with phosphorus shows ...
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