STUDIES ON THE ISOTHERMAL SOLUBILITY AND THE NEW PHASES IN THE TERNARY-SYSTEM MGCL2-CO(NH2)(2)-H2O AT 25-DEGREES-C

The solubilities and refractive indices, densities of the saturated so lutions in the title ternary System have been investigated isothermall y at 25 degrees C. In the ternary system, there are two new phases bei ng formed, MgCl2. CO(NH2)(2). 4H(2)O(compound A) and MgCl2. 4CO(NH2)(2 ). 2H(2)O(compound B). Compound B is found for the first rime. The two compounds are characterized by IR spectra, DTA, DSC, X-Ray diffractio n etc. The solubility diagram is consisted of four crystallization sur faces corresponding to MgCl2. 6H(2)O, ternary compounds A, B and CO(NH 2)(2), and three invariant points corresponding to the eutectic soluti ons saturated with MgCl2. 6H(2)O+A, A+B, B+CO(NH2)(2).