Crystal Research and Technology
Cryst. Res. Technol. 34 (1999) 311 - Abstract -

M. ZHA*, C.FERRARI*, S. GENNARI**, L. ZANOTTI*, C. RAZZETTI**, C. PAORICI**

* MASPEC-CNR Institute, Parma, Italy
** INFM- Physics Dept., University of Parma, Parma, Italy

Semiopen Physical Vapour Transport Growth of Urotropine Crystals

It is reported for the first time the growth of urotropine (HMT) crystals by a semiopen physical vapour transport (SOPVT) technique. HMT crystals, approximately 1 cm3 in volume, are grown on a glass pedestal from solution-grown seeds. The final habit of the crystals is limited by rhomboedrical {110} faces which develop on an otherwise hemispherical shape. Preliminary X-ray diffraction investigations (rocking curves and topographs) point to a still non-homogeneous crystal structure, which very likely originates at the seed-crystal interface. However, in comparison with solution-grown samples, the best structural quality was observed in a SOPVT-grown sample.

Keywords: urotropine, vapour growth, structural characterization


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