Growth mechanism of Ba(NO3)2 crystals from aqueous solution as revealed by growth rate measurements coupled with surface observations

Growth of Ba(NO3)2 crystals were investigated by measuring the growth rate of (111) faces ex situ, followed by measuring the slope angle of spiral hillocks by means of interferometries. Although growth rate versus supersaturation showed a linear relation, the dependence of slope angle of hillocks upon supersaturation was found to deviate from the BCF theory. Especially when the supersaturation was medium, from 1% to 3%, the slope angle of spiral...