Growth of Rutile of Controlled Composition from Borate Fluxes

Abstract
Rutile crystals of controlled composition have been grown from Na2O·3B2O3 and K2O·3B2O3 fluxes. The compositions were controlled by the use of various atmospheres of known oxygen activity as the equilibrium vapor phase. The crystals are prisms 2 to 10 mm in length and 0.1 to 0.3 mm in thickness. The morphology of the crystals and their response to changes in temperature, oxygen activity, and flux composition are described. The average dislocation density is 4×104 cm−2, but dislocation‐free areas can be found.

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