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Gettering effects have been investigated for doped Mg- and Ca-impurities in liquid encapsulated Czochralski (LEC)-grown InP single crystals. Impurity analyses were carried out for Mg- and Ca-doped InP starting materials, LEC-grown crystals and residual B2O3 encapsulants. It was found that Mg and Ca could be removed as oxide from the melt due to a chemical reaction with a B2O2 encapsulant during growth.
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Kubota et al. (1985) studied this question.
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