Abstract
Experiments relating to the gel growth of cadmium mercury thiocyanate (CHT) and zinc mercury thiocyanate (ZHT) in single crystal form are described. Single CHT crystals of 2–3 mm in size have been successfully grown in silica gels at near ambient temperatures, within 7–10 days. Similar growth conditions have yielded ZHT crystals of needle form 10 mm long, 1 mm wide, and ∼ 0.2 mm thick. The behavior of the system was indicative of a continuous precipitation dissolution cycle. The nature of the multiple precipitates observed in certain experiments is discussed. The aqueous solubility of CHT at 33.6°C has been determined as 1.065 × 10 −2 g/cm 3. Characterization of the crystals in terms of their structure (as determined by X-ray diffraction techniques), morphologies, thermal stability, and chemical purity is described.
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