EVALUATION OF THERMODYNAMIC CHARACTERISTICS OF NICKELITO(COBALTO)-CUPRATO-MANGANITES LaMeI2Ni(Co)CuMnO6 AND LaMeIINi(Co)CuMnO6 (MeI – Li, Na, K; MeII – Mg, Ca, Sr, Ba)

Abstract

Standard thermodynamic functions of nickel-cuprate-manganites and cobalt-cuprate-manganites of compositions obtained by us are calculated by approximate methods of calculation LaMeI2NiCuMnO6, LaMeI2CoCuMnO6, LaMeIINiCuMnO6 and LaMeIICoCuMnO6 (MeI – Li, Na, K; MeII – Mg, Ca, Sr, Ba). The standard enthalpies of formation of nickelite (cobalt) -cundratemanganites of lanthanum, alkali and alkaline earth metals are calculated by the method developed by us, which previously showed sufficient accuracy and reliability in calculating the similar characteristics of ternary oxides and manganites of alkali, alkaline earth and rare earth metals. the standard enthalpies of formation of the above compounds from oxides were calculated, the averaged values of the similarity coefficients ( К ), on the basis of which the standard enthalpies of formation of nickelite (cobalto) -crabroto-manganites from simple substances were calculated. When calculating, reference data on the standard enthalpies of formation of oxides of lithium, sodium, potassium, alkaline earth metals, copper (II), nickel (II), cobalt (II), manganese (III), lanthanum (III), and also ternary manganites LaMeI3MeII3Mn4O12 (MeI - alkali, MeII - alkaline earth metals). The standard heat capacities and standard entropies of the studied compounds were calculated by the ion increment method. The results obtained are of interest for the thermodynamic substantiation of the processes of the synthesis of these and similar compounds and serve as initial information files for fundamental reference books and data banks.

References

[1] Portnoi K.I., Timofeeva N.I. Kislorodnye soedineniya redkozemel'nyh elementov. M.: Metallurgiya, 1986. 480 p.
[2] Tret'yakov Yu.D., Bryleov O.A. Novye pokoleniya neorganicheskih materialov // Zhurnal RHO im. D. I. Mendeleeva. 2000. Vol. 45, N 4. P. 10-16.
[3] ErinYu. Naideno veshchestvo s gigantskim znacheniem dielektricheskoi pronicaemosti // Himiya i himiki. 2009. Vol. 45, N 4. P. 10-16.
[4] Baisanov S.O., Gabdullin T.G., Takenov T.D. Ob organizatsiy proizvodstva margancevogo ferrosplava iz kazahstanskogo syr'ya // Stal'. 1997. N 7. P. 29-32.
[5] Baisanov S.O., Takenov T.D., Tolymbekov M.Zh. idr. Ob usloviyah selektivnogo vosstanovleniya v sisteme Fe-Mn-O // Vestnik KarGU im. E.A. Buketova. Seriya him. 2005. N 4(40). P. 65-70.
[6] Kasenov B.K., Kasenova Sh.B., Sagintaeva Zh.I. i dr. Dvoinye I troinye manganity, ferrity I hromity shchelochnyh, shchelochnozemel'nyh I redkozemel'nyh metallov. M.: Nauchnyy mir, 2017. 416 p.
[7] Kasenov B.K., Edil'baeva S.T., Mustafin E.S. i dr. Otsenka termodinamicheskih funkciy troinyh oksidov LnMeMn2O5 (Ln – r.z.e., Me – shchelochnoi metall) // Zhurn. fiz. himii. 1999. Vol. 73, N 6. P. 1116-1118.
[8] Oralova A.T. Kasenov B.K., Edil'baeva S.T. idr. Ocenka termodinamicheskih svoistv manganitov LnMe3Met3Mn4O12 (Ln – La, Nd, Dy; Me-shchelochnye, Met-shchelochnozemel'nye) // Vestnik KazNU im. al'-Farabi. Seriya him. 2007. N 2(46). P. 150-156.
[9] Termicheskie konstanty veshchestv: Spravochnik / Pod red. V.P. Glushko. M.: Nauka, 1981. Vyp. Х. Ch. 1. 300 p.
[10] Termicheskie konstanty veshchestv: Spravochnik / Pod red. V.P. Glushko. M.: Nauka, 1982. Vyp. 10. Ch. 2. 444 p.
[11] Termicheskie konstanty veshchestv: Spravochnik / Pod red. V.P. Glushko. M.: Nauka, 1979. Vyp. 9. 576 p.
[12] Termicheskie konstanty veshchestv: Spravochnik / Pod red. V.P. Glushko. M.: Nauka, 1978. Vyp. 8. Ch. 1. 536 p.
[13] Termicheskie konstanty veshchestv: Spravochnik / Pod red. V.P. Glushko. M.: Nauka, 1972. Vyp. 6. Ch. 1. 370 p.
[14] Termicheskie konstanty veshchestv: Spravochnik / Pod red. V.P. Glushko. M.: Nauka, 1974. Vyp.7. Ch.1. 344 p.
[15] Kumok V.N. // V sb.: Pryamye I obratnye zadachi himicheskoi termodinamiki. Novosibirsk: Nauka, 1987. P. 108.