FIELD: inorganic chemistry. SUBSTANCE: copper and ammonium carbonate interacts in the presence of water, quantity of said components (mass) being 19-22 and 78-75 respectively. Thus prepared mixture is stirred and 20-40 solution of H3PO4 is added into it. Quantity of said solution is 100 of its stoichiometric quantity. Thus obtained mixture is heated to 40-60 C and mixed within 2 h. Then mixture is cooled, the process is followed by isolation of precipitate. Yield of desired product is 99.9 main substance content in it being 100 EFFECT: improves efficiency of method. 5 tbl
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