The habit of crystals was dominated by (100) faces which exhibited pyramidal features and a strong tendency to form large terraces. As the current density was increased, the crystals departed from a cubic shape via the formation of dendritic growth along [111] directions. The critical current density for the growth of crystals of cubic shape was in the region of the theoretical estimate of 30mA/cm2.

Surface Structure and Electrolytic Growth Stability of LaB6 Crystals. Elwell, D., Zubeck, I.V., Feigelson, R.S., Huggins, R.A.: Journal of Crystal Growth, 1975, 29[1], 65-8