Radon hydrate

Radon forms a series of clathrate compounds (inclusion compounds) similar to those of argon, krypton, and xenon. These can be prepared by mixing trace amounts of radon with macro amounts of host substances and allowing the mixtures to crystallize. No chemical bonds are formed the radon is merely trapped in the lattice of surrounding atoms it therefore escapes when the host crystal melts or dissolves. Compounds prepared in this manner include radon hydrate, Rn 6H20 (Nikitin, 1936) radon-phenol clathrate, Rn 3C H 0H (Nikitin and Kovalskaya, 1952) radon-p-chlorophenol clathrate, Rn 3p-ClC H 0H (Nikitin and Ioffe, 1952) and radon-p-cresol clathrate, Rn bp-CH C H OH (Trofimov and Kazankin, 1966). Radon has also been reported to co-crystallize with sulfur dioxide, carbon dioxide, hydrogen chloride, and hydrogen sulfide (Nikitin, 1939). 

Nikitin, B. A., Radon Hydrate, Z. anorg. allgem, chem. 227 81-93 (1936). 

In aU known compounds, actinium appears as Ac with the radon structure, the hydrated ion occurring in aqueous solutions of its salts. Thorium salts give Th + ions. The identification of halides of Th and Th Ms questioned solids resulting from the thermal decomposition of Thl4 liberate hydrogen from water, the thorium being oxidised to Th, presumably, if a lower iodide is formed, by the reaction ... 

Prior to 1962 the rare gases were frequently called inert gases as no chemical compounds were known (there were a few clathrates and hydrates ), but the realization that the ionization potential of xenon was sufficiently low to be accessible to chemical reaction led to the preparation of several fluorides, oxides, oxyfluorides, and a hexafluoroplatinate of xenon. Several unstable krypton and radon compounds have been synthesized. 

Hydratable oxides may also be present in NFS from some sources, which could potentially contribute to volumetric instability. Depending on the ore and metallurgical process, nonferrous slags produced from sulfide ores can contain leachable elemental sulfur and heavy metals, which should be investigated prior to use. Sulfurous leachate is primarily of aesthetic concern, resulting in sulfur odor and possible discoloration of water in poor drainage conditions. In addition, phosphate rocks can contain between 30-200 ppm uranium. Most of this uranium is incorporated in the phosphorus slag and results in the release of some radiation (in the form of radon gas). 

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