During an investigation of flux growth of bromellite crystals, variations of crystal morphology were found which were dependent only upon the flux composition. Two morphologies were found, a rod-shaped crystal with an external c/a ratio up to 50 and a prismatic crystal with a c/a ratio of about 1 to 2. The flux system explored was Na2O-B2O3. This solvent was chosen because it has much higher solubilities at 1250°C for BeO than the molybdate and lead fluxes (Newkirk, 1965; Auster-man, 1962; Linares, 1962), e.g., 20 as opposed to 5 weight percent.

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