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2013
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The ZnCl 2 -CO(NH 2 ) 2 -HCl-H 2 O quaternary system at 25°C was studied by the solubility method. The concentration boundaries of crystallization were established for the phases that correspond to the eutonic compositions of ternary systems, for double carbamide compounds with zinc chloride and hydrochloric acid, and for the compound ZnCl 2 · 2CO(NH 2 ) 2 · HCl.