FIELD: growing crystals at preset form and crystallographic orientation from aqueous solutions. SUBSTANCE: hermetic crystallizer provided with growth chamber and submersible centrifugal pump is fully filled with working salt solution. Inner surfaces of crystallizer cover and platform are made in form of common truncated cone; it is provided with branch pipe for filling the crystallizer with working solution and evacuating air from it; in operating position this hole is stopped by hermetic plug. Submersible centrifugal pump has housing where stator of electric drive of impeller is mounted; it is provided with rotor; amount of clearances between fixed part of pump and its movable parts is ensured due to magnetic suspension of rotor to stator. EFFECT: enhanced resistance of working solution to spontaneous solidification due to avoidance of sources of spontaneous nucleation of microcrystals. 6 cl, 3 dwg, 1 tbl
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