Solid-state reaction between thallous carbonate and iodine

Rastogi, R. P. ; Dubey, B. L. ; Pandey, N. K. (1972) Solid-state reaction between thallous carbonate and iodine Journal of Inorganic and Nuclear Chemistry, 34 (7). pp. 2127-2132. ISSN 0022-1902

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Iodine vapour reacts with solid thallous carbonate liberating carbon dioxide. A yellow coloured reaction product is formed which subsequently changes into a black one. The latter has been identified as Tl2OI2 which at higher temperature liberates oxygen and forms T1I. The crystal lattice of Tl2OI2 belongs to the orthorhombic system with a = 16·83 Å, B = 11·12 Å, C = 8·52 Å, and Z = 8. The pycnometric density, using cyclohexane as displacing liquid, has been found to be 5·617 ± 0·005 g/cm3 whereas the X-ray density is 5·653 g/cm3. The kinetics of the bulk diffusion of iodine in the solid has also been studied and a mechanism of propagation of the reaction is discussed.

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Deposited On:21 Jun 2011 13:44
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