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Abstract
An in-situ optical spectroscopy investigation at high temperatures is reported into the defect chemistry and cation kinetics of cobalt-containing olivines. The equilibrium defect optical absorption is studied as a function of oxygen activity at high temperatures. The kinetics of cation redistribution between the two non-equivalent sites in the olivine crystal structure is investigated by temperature-jump relaxation experiments. It is found that both the compositional dependence of kinetics of the cation redistribution process and the dependence of point defect concentration on oxygen activity favor a defect model involving cation vacancies and electron holes (Co3+).
Published Online: 2010-11-30
Published in Print: 2011-01
© by Oldenbourg Wissenschaftsverlag, Braunschweig, Germany
