Abstract
Polymorphic transformations in K0.965Rb0.035NO3 single crystals have been investigated by optical microscopy and X-ray diffraction. The equilibrium temperature between modifications II and III of the crystal studied is determined to be T = 452 ± 0.5 K. It is found that polymorphic transformations are of the single crystal ↔ single crystal type and occur with the formation and growth of nuclei of new crystals in matrix ones at II ↔ III transformations. An empirical dependence of the growth rate of modification III on temperature is established in the form ϑ = ϑ = (–0.478ΔT + 0.712ΔT 2–0.00041ΔT 3) × 10–2 cm/s (ΔT = T tr–T 0, where T tr is the transformation temperature and T 0 is the equilibrium temperature).
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Nasirov, V.I., Bairamov, R.B. & Nasirov, E.V. Morphology and kinetics of polymorphic transformations in K0.965Rb0.035NO3 single crystals. Crystallogr. Rep. 60, 1155–1159 (2015). https://doi.org/10.1134/S1063774515070184
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DOI: https://doi.org/10.1134/S1063774515070184