Potassium chlorate crystal structure

Other inorganic crystals studied by Mark and his collaborators, sometimes leading to complete structure determinations, include strontium chloride, zinc hydroxide, tin tetraiodide, potassium chlorate, potassium permanganage, and ammonium ferrocyanide. Minerals investigated by them include CaSO (anhydrite), BaSO (barite), PbSO, Fe2TiO[j (pseudobrookite), and three forms of Al2Si05 (cyanite, andalusite, and sillimanite). 

The atomic interpretation also leads to the prediction of differences in crystal structure which would reflect what, on the atomic account, are differences in molecular structure, but fail to materialise. Potassium nitrate and potassium chlorate, for example, have different structural formulas but are isomorphous salts. 

If the alkali is KOH, crystals of KCIO3, potassium chlorate, are deposited on cooling because it is sparingly soluble. The chlorate ion is pyramidal (Structure 6.5) in accordance with VSEPR theory the chlorine oxidation number is +5. Bromine and iodine behave in a similar way to chlorine, except that BrO" and lO" disproportionate much more easily than CIO" in the alkaline solution. The result is that the reaction of these elements with hot or cold alkali produces bromates or iodates. 

Grayish-white metal hody-centered cubic crystalline structure density 19.3 g/cm3 melts at 3,422°C vaporizes at 5,555°C vapor pressure 1 torr at 3,990°C electrical resistivity 5.5 microhm-cm at 20°C modulus of elasticity about 50 to 57 x lO psi (single crystal) Poisson s ratio 0.17 magnetic sus-ceptibilty +59 x 10-6 thermal neutron absorption cross section 19.2 + 1.0 barns (2,200m/sec) velocity of sound, about 13,000 ft/sec insoluble in water practically insoluble in most acids and alkabes dissolves slowly in hot concentrated nitric acid dissolves in saturated aqueous solution of sodium chlorate and basic solution of potassium ferricyanide also solubibzed by fusion with sodium hydroxide or sodium carbonate in the presence of potassium nitrate followed by treatment with water... 

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