Solid zirconium iodides

CUB/LAU] Cubicciotti, D., Lau, K. H., Thermodynamics of vaporization of ZrL4 from substoichiometric solid zirconium iodides, J. Electrochem. Soc., 126, (1981), 771-774. Cited on page 177. 

ZrI4 ZIRCONIUM IODIDE 92.902 2.0270E-01 -4.6822E-04 5.1226E-07 -2.1446E-10 298 704 solid... 

Another application is in tire oxidation of vapour mixtures in a chemical vapour transport reaction, the attempt being to coat materials with a tlrin layer of solid electrolyte. For example, a gas phase mixture consisting of the iodides of zirconium and yttrium is oxidized to form a thin layer of ytnia-stabilized zirconia on the surface of an electrode such as one of the lanthanum-snontium doped transition metal perovskites Lai j.Srj.M03 7, which can transmit oxygen as ions and electrons from an isolated volume of oxygen gas. 

Mixed Chloride-Iodide Zirconium Cluster Phases with a 6 18 Metal Halide Ratio -Products from Solid-state Reactions... 

Zirconium(IV) and hafnium(IV) halides form adducts with a variety of monodentate and polydentate amines. Typical complexes are listed in Table 3. In general, these compounds are air- and moisture-sensitive white solids (yellow when the halide is iodide), thermally stable and insoluble in most organic solvents. 

In our first approach, a nonradioactive, representative fission-product mixture was prepared, consisting of equal masses of the desired elements. An ammonium hydroxide solution was used to dissolve molybdenum trioxide, M0O3 this solution was added to an aqueous solution containing the nitrates of cerium, palladium, and rhodium. The resulting mixture was calcined at 500°C for 17 hours, then at 550°C for an additional seven hours. The solids from the calcination were powdered and added to a blended mixture consisting of the oxides of antimony, ruthenium, samarium, strontium, yttrium, and zirconium. Cesium was then added as cesium iodide niobium was added as potassium hexaniobate,... 

The molar volumes and liquid-gas phase compositions for the ZrCl -HfCl4 systems have also been studied (144). Nisel son (396) found that the binary systems of zirconium-hafnium chlorides, and bromides and iodides as well, have unlimited solubility in the liquid and solid states. The systems ZrCl4-ZrBr4 and ZrCl4-Zrl4 form a continuous series of solid solutions which contains a minimum. No mention is made of the possibility of mixed halide species. 

Anhydrous zirconium (IV) iodide is an orange crystalline solid which fumes heavily in air. It dissolves completely in water with the liberation of energy. According to Blumen-thal, it has a heat of formation of 90 kcal./mol at 25°. It sublimes at 431° at atmospheric pressure and melts at 499° at elevated pressures. Its heat and entropy of sublimation are 29.0 and 41.2 kcal./mol, respectively. Its magnetic susceptibility is —0.238 X 10 c.g.s. electromagnetic units. 

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