Communication

Secondary ionic forces in lead molybdate melt solidification
H.C. Zeng, L.C. Lim
(National University of Singapore)

We report a dendritic crystallization of ionic melt of lead molybdate (PbMoO₄) under a concentric thermal field. The solidified melt is a PbMoO₄ single crystal with [001] axis normal to surface. The dendrite arms propagate and branch along 310> and 130>, forming a well-organized sur-face structure. It is evident that the interaction between a cation to its second-nearest anions determines the dendrite development and melt solidification.
Keywords: optical materials; phase transformation; Czochralski growth
Order No.: JA806-005 © 1998 MRS

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