GAS-PHASE COMPOSITION OVER Y3FE5O12

The account of the gas phase composition over Y3Fe5O12 in dependence o n temperature and partial pressure of oxygen Po-2 at the total pressur e in system P = 10(5) Pa was performed with the use of the program Ast ra.4. Polynomials was offered for account of hears capacities C-p(T) s olid solutions Ln(3-c)Ln(c)Fe(5)O(12) (Ln: Lanthanide Elements and Y), it is shown, that dissociation of garnet results in formation in gas phase of substances. Fe, FeO, YO2, O, O-2, over 900 K and at further i ncrease of temperature in addition will be formed: Fe+, YO YO+. The pr esence of FeO (that; is ions Fe2+) in gas phase is one more proof of r eaction: Y3Fe5O12 --> 3/2 O-2 + 3 V-o '' + 6 Fe'.