Crystal Research and Technology
Cryst. Res. Technol. 37 (2002) 43 - Abstract -

X. N. Jiang, D. Xu, D. L. Sun, D. R. Yuan, M. K. Lu, S. Y. Gou, X. L. Yu

State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, People’s Republic of China

Direct Growth of Aggregates on {110} Faces of Cadmium Mercury Thiocyanate Crystals

New growth phenomena - direct incorporation of aggregates have been observed on the {110} faces of cadmium mercury thiocyanate CdHg(SCN)4 crystals by atomic force microscopy. These aggregates grow in two forms: some directly cover up the steps and forms new growth layers; while others are just incorporated at the step edges. These aggregates, which are mostly oriented along [111] direction, are formed by small columnar structural units. The aggregates have the similar structure of CdHg(SCN)4 crystals and greatly vary in nature with the variation of solution supersaturation σ and growth time t. With the increase of σ the aggregates become larger, consistent with the variation of growth units dimension with the supersaturation; and with the increase of growth time the aggregates become more structurally substantial. These observations have led to a new understanding about the crystal growth.

Keywords: direct growth of aggregates, supersaturation, growth time, atomic force microscopy, CMTC crystals


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