Oxide single crystal and method of manufacturing thereof

摘要

To provide an oxide single crystal of large size having the crystal structure of Ca3Ga2Ge4O14 and containing Ge as a constituent element and a method of manufacturing thereof. The oxide single crystal is obtained by a manufacturing method comprising the steps of preparing a melt of starting materials containing GeO2 and growing said oxide crystal from said melt of starting materials in single-crystal growing atmosphere, which is characterized in that said starting materials contain GeO2 in a stoichiometrically excess amount, or said single-crystal growing atmosphere is a gas having an oxygen partial pressure greater than 2 x 10<-1> atm.