Anisotropy of thermal expansion of 0.85 Na2CrO4· 0.15 Na2CO3

Abstract

AbstractThe phase diagram of the binary system sodium chromate-sodium carbonate has been studied using X-ray and thermal methods. The system shows a large miscibility gap at low as well as at high temperatures. The sodium carbonate rich part yields zone information. Sodium chromate rich crystals show dendritic and radial growth. The hexagonal high-temperature phase of mixed crystals with composition 85 × Na2CrO4+ 15 × Na2CO3exhibit a vanishing volume expansion.