By the method of dynamic calorimetry in the range of 298.15-673 K, the heat capacity of titanium-manganite LaСаTiMnO6, obtained by solid-phase interaction at 800-1200oC from lanthanum, titanium (II), manganese (III) and calcium carbonate oxides was studied. On the dependence curve Ср°~¦(T) in the specified temperature range, a λ-shaped effect was detected at 598 K, probably related to the phase transition of the second kind. A fundamental constant is determined — the standard heat capacity of LaСаTiMnO6, equal to 221±14 J /(mol×K). Its standard entropy, equal to 206±6 J/(mol×K), was estimated by the approximate method of ion increments. Based on experimental data, taking into account the temperature of the phase transition, the equations describing the temperature dependences of Ср°~¦(T) and the thermodynamic functions So (T), Ho (T) — Ho (298.15) and Фхх(Т) of the investigated titanium-manganite lanthanum and calcium are calculated. The standard heat capacity of LaСаTiMnO6 is also calculated using the Debye method, the value of which is in good agreement with experimental data. According to the developed methodology, the standard enthalpy of titanium-manganite formation was calculated, equal to — 3867.5 kJ/mol.

We study the temperature dependences of the specific heat of nanostructured lanthanum and sodium copper–zinc manganite LaNa 2 CuZnMnO 6 by dynamic calorimetry in the temperature range 298.15–673 K. The curve of specific heat dependence on temperature at 348 K shows a jump, probably related to a phase transition of the second kind. We derive the equations for the temperature dependence of specific heat, taking the phase transition temperature into account. The standard entropy is calculated, and the temperature dependences of the thermodynamic functions of the studied manganite are determined. The temperature dependence of the electrical resistance is studied in the range of 293 to 483 K using an LCR meter (Taiwan); at 343 K, the possible semiconductor conductivity transforms into a metallic one; and at 443 K, the metallic conductivity transforms into a semiconductor one. The bandgaps are calculated.

Titanium-manganites of LaLi2TiMnO6 and LaNa2TiMnO6 were synthesized by the methods of ceramic technology from the oxides of lanthanum, titanium (IV), manganese (III), and the carbonates of lithium and sodium. The types of their syngony and the parameters of their gratings were determined radiographically. The isobaric heat capacities of titanium-manganites were measured with experimental calorimetry in the range of 298.15–673 K. It was found that on the dependence curve of heat capacity versus temperature of C°p~f(T), for LaLi2TiMnO6 at 348 K and 598 K, and LaNa2TiMnO6 at 348 K, there are abnormal jumps in heat capacity, probably related to phase transitions of the second kind. Taking into account the temperatures of the phase transitions, the equations of the temperature dependence of the heat capacity of titanium-manganites were derived. Their standard entropies were calculated by the ion increments method. Temperature dependences of the thermodynamic functions of S°(T), H°(T)-H°(298.15), and Φxx(T) were calculated using the experimental data on heat capacities and the calculated values of the standard entropies. The standard heat capacities of the studied compounds were calculated by the independent methods of ion increments and Debye, the values of which were in satisfactory agreement with the experimental data. The standard enthalpy of the formation of LaLi2TiMnO6 and LaNa2TiMnO6 was calculated according to the methodology developed by the authors. The conducted electrophysical studies determined the nature of the second-order phase transition and the semiconductor features of their conductivity. Thus, all the above-mentioned data on the experimental and calculated studies of the temperature dependence of heat capacity, the thermodynamic functions to determine a standard enthalpy of formation of LaLi2TiMnO6 and LaNa2TiMnO6, and the investigation of their electrical properties are absolutely new, and they have no analogues.

The titanium-manganites of LaMeI2TiMnO6 (MeI — Li, Na, K) were synthesized by the ceramic technology with the high-temperature reaction of oxides of La2O3, TiO2, Mn2O3 with carbonates of Li2CO3, Na2CO3, K2CO3 within 800–1200 ºС. The X-ray diffraction methods demonstrated that all of them were crystallized in the cubic syngony with the lattice parameters such as LaLi2TiMnO6 — а = 13.480.02 Å, Vo = 2449.460.06 Å3, Z = 4, Voel.cell = 612.870.02 Å3, roent. = 3.81; pick. = 3.780.03 g/cm3; LaNa2TiMnO6 — а = 14.060.02 Å, Vo = 2779.430,06 Å3, Z = 4, Voel.cell = 694.960.02 Å3, roent. = 3.67; pick. = 3.650.01 g/cm3; LaK2TiMnO6 — а = 14.740.02 Å, Vo = 3202.520.06 Å3, Z = 4, Voel.cell = 800.520.02 Å3, roent. = 3.45;  pick. = 3.430.01 g/cm3. Correctness and authenticity of the results on the indexing of X-ray photographs of titanium-manganite were confirmed with the good experimental and calculated values (104/d2), the pycnomet-ric and X-ray densities, and also the theoretical and experimental values of cell volumes. The rising of values of the lattice parameters of the synthesized titanium-manganites was determined with increasing in the ionic radii from Li to K.

Copper–zinc lanthanum and calcium manganite LaCaCuZnMnO 6 was synthesized from oxides of lanthanum(III), copper(II), zinc(II), manganese(III), and calcium carbonate in the temperature range 1073–1473 K. Nanostructured particles were obtained by grinding the material in a vibratory mill. The heat capacity of the compound was studied in the range of 298.15–673 K on an IT-S-400 calorimeter. On dependence curve C_p^∘ f ( T ) at 598 K, an anomalous jump in heat capacity was detected. The temperature dependences of the electrical resistance and relative permittivity were studied on an LCR-781 setup (Taiwan) at 293–483 K and at frequencies of 1, 5, and 10 kHz. A semiconductor character of the conductivity was established. At 483 K, an anomalously high value of the permittivity was revealed at all studied frequencies.

The copper-zinc manganites of LaMeIICuZnMnO6 (MeII — Mg, Ca, Sr, Ba) have been synthesized with the high-temperature interaction of alkaline earth metals carbonates with oxides of lanthanum (III), copper (II), zinc (II) and manganese (III). The synthesized polycrystalline copper-zinc manganites have been grinded on the Retsch vibration mill MM301 (Germany). As a result their nanostructured particles have been obtained. Their sizes have been determined using an electron microscope Mira3 LMU, Tescan. Methods of radiography determined that all synthesized nanostructured copper-zinc manganites crystallize in the cubic syngony with the following parameters of a lattice: LaMgCuZnMnO6 — а = 13.530.02 Å, Vo = 2476.810.06 Å3, Z = 4, Voelect.cell = 619.200.02 Å3, roent = 4.52; pick = 4.500.01 g/cm3; LaCaCuZnMnO6 — а = 13.690.02 Å, Vo = 2565.730.06 Å3, Z = 4, Voelect.cell. = 641.430.02 Å3, roent = 4.43; pick = 4.410.01 g/cm3; LaSrCuZnMnO6 — а = 13.910.02 Å, Vo = 2691.420.06 Å3, Z = 4, Voelect.cell = 672.850.02 Å3, roent = 4.99; pick. = 4.960.01 g/cm3; LaBaCuZnMnO6 — а = 14.550.02 Å, Vo = 3080.270.06 Å3, Z = 4, Voelect.cell = 770.070.02 Å3, roent = 4.95; pick = 4.940.01 g/cm3. The X-ray investigations demonstrated that the values of lattice parameters of the studied copper-zinc manganites have been increased from Mg to Ba. As a result of the investigations, these compounds can be included in Pm3m spatial group.

The paper demonstrates the results of the experimental investigation of the thermodynamic and electrophysical properties of the new nanostructured copper-zinc manganite of lanthanum and lithium (LaLi2CuZnMnO6).

The temperature dependences of the specific heat of nanoscale (nanocluster) cobaltite(nickelite)-cuprate-manganites LaSrCoCuMnO6 and LaSrNiCuMnO6 have been studied via experimental dynamic calorimetry in the range of 298.15–673 K. The temperature dependences of the specific heat $${C}_{p}^{\circ }$$ ~ f(T) of LaSrCoCuMnO6 (at 323 and 523 K) and LaSrNiCuMnO6 (at 348 K) exhibit anomalous jumps in the specific heat, which are likely due to the second-order phase transitions. Based on the experimental data on $${C}_{p}^{\circ }$$(T) and the calculated value of entropy S°(298.15), the temperature dependences of the specific heat and thermodynamic functions of the studied compounds are calculated in the temperature range of 298.15–673 K.

The temperature dependences of the specific heat capacities of nanosized samples of lanthanum magnesium cobaltite cuprate manganite LaMgCoCuMnO6 and lanthanum magnesium nickelite cuprate manganite LaMgNiCuMnO6 are studied via calorimetry in the temperature range of 298.15–673 K. Curve $$C_{p}^{ \circ }$$(T) shows that LaMgCoCuMnO6 and LaMgNiCuMnO6 undergo second-order phase transitions at 398 and 523 K, respectively. The standard specific heat capacities of the above compounds are calculated with independent means based on characteristic Debye temperatures determined via the Koref and Nernst–Lindemann equations. Their values agree satisfactorily with experimental data. The temperature dependences of functions S°(T), H°(T) – H°(298.15), and Фхх(T) are calculated.

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.

From oxides of lanthanum, copper (II), cobalt (II), nickel (II), manganese (III) and calcium carbonate at temperatures 800-1200 °C for 20 hours by the method of ceramic technology synthesized cobalt-cuprate-manganite lanthanum and calcium LaCaCoCuMnO6 and nickelite-cuprate-manganite lanthanum and calcium LaCaNiCuMnO6. On a vibrating mill of “Retsch” company (Germany) of the MM301 brand, polycrystalline samples of new compounds were ground to nanosized (nanoclusters) particles. The X-ray diffraction of the obtained nanosized (nanoclusters) phases indicates that they crystallize in cubic syngony with the following lattice parameters: LaCaCoCuMnO6 − а=14,01±0,02A; Vo=2746,77±0,06A3; Z=4; Voel.cell=686,69±0,02A3; X-ray=4,13g/cm3; pycn.=4,080,01g/cm3; LaCaNiCuMnO6 − а=14,74±0,02A; Vo=3204,74±0,06A3; Z=4; Voel.cell =801,19±0,02A3; X-ray=4,15g/cm3; pycn.=4,130,01g/cm3. References [1] Tretyakov Yu.D., Brylev OA New generations of inorganic materials // Magazine RKKHO im. Di. Mendeleev. 2000. Vol. 45, N 4. P. 10-16. [2] Tretyakov Yu.D., Gudilin E.A. Chemical principles of obtaining metal oxide superconductors // Success of chemistry. 2000. Vol. 69, N 1. P. 3-39. [3] Yerin Yu. Founded a substance with giant value of dielectric permeability // Chemistry and chemist. 2009. Vol. 45, N 4. P. 10-16. [4] Nagaev N.A. Lanthane manganites and other magnetic semi-finders with a huge magneto resistance // Successes of physical sciences. 1996. Vol. 166, N 8. 833 p. [5] Kasenov B.K., Mustafin E.S., Sagintaeva Zh.I., Isabaeva M.A., Davrenbekov S..Zh., Kasenova Sh.B., Abildaeva A.Zh. X-Ray characteristic characteristics of new chromito-manganes LaMn3CrMOO6 and LaMn3CrMnO6.5 (M1 = Li, Na; M11 = Mg, Ca) // Magazine of inorganic chemistry - 2013. Vol. 58, N 2. P. 243-245. [6] Kasenov B.K., Davrenbekov S.Zh., Mustafin E.S., Kasenova Sh.B., Sagintaeva Zh.I., Abildaeva A.Zh., Ermagambet B.T., Bekturganov Zh.S. Synthesis and X-Ray detection of new nanostructured manganite-ferrites of NdM1 MnFeO6 (MII = Mg, Ca, Sr, Ba) // Journal of inorganic chemistry. 2013. Vol. 58, N 5. P. 646-649. [7] Kasenov B.K., Sagintaeva Zh.I., Kasenova Sh.B., Davrenbekov S.Zh., Abildaeva A.Zh. X-Ray study of nanosructured nanoparticles of ndmimnfeo5 manganite-ferrites (MI = Li, Na, K) // Journal of inorganic chemistry. 2013. Vol. 58, N 8. P. 1095-1098. [8] Kasenov B.K., Kasenova Sh.B., Sagintaeva Zh.I., Abildaeva A.Zh. Synthesis and X-Ray study of manganite-ferrites of LaMI12 MnFeO6 (MII = Mg, Ca, Sr, Ba) // Journal of inorganic chemistry. 2014. Vol. 59, N 4. P. 531-533. [9] Kasenov Sh.B., Kasenov B.K., Sagintaeva Zh.I., Kuanishbekov E.E., Yermahambet B.T., Seysenova A.A., Smagulova D.I. Synthesis and X-Ray study of nanostructured nanoparticles of LaMII2CuMnO cuprato-manganites (MII = Mg, Ca, Sr, Ba) // Inorganic chemistry journal. 2014. Vol. 59, N 9. P. 1243-1247. [10] Uvarov N.V., Boldyrev V.V. Dimensional effects in chemistry of heterogeneous systems/ Success of chemistry. 2001. Vol. 70, N 4. P. 307-329. [11] Kovba L.M., Trunov V.K. X-ray phase analysis. M.: Izd-vo MGU, 1976. 256 p. [12] Kivilis S.S. Technique of measuring the density of liquids and solids. M.: Standartgiz, 1959. 191 p. [13] Nakamoto K. IR. Spectra and spectra of inorganic and coordinated compounds. M.: MIR, 1991. 536 p.

The enthalpies of dissolution of 3,4β-epoxyarglabin C15H18O4 are measured via isothermal calorimetry at lactone: 96% ethanol molar ratios of 1: 6000, 1: 12000, 1: 24000 at 298.15 K. The standard enthalpy of dissolution of C15H18O4 in 96% ethanol is calculated from the obtained data; the value is 40.1 ± 0.4 kJ/mol. The enthalpies of combustion, melting, and formation of 3,4β-epoxyarglabin C15H18O4 are estimated by approximate means.

Ferro-chromo-manganites with compositions LaMeFeCrMnO 6.5 (Me = Li, Na, K) are synthesized via ceramic technology from La 2 O 3 (special purity grade), Fe 2 O 3 , Cr 2 O 3 , Mn 2 O 3 , and carbonates of alkali metals (analytical grade). The individuality of the resulting compounds is confirmed via X-ray phase analysis. The heat capacity of nanosized LaMeFeCrMnO 6.5 (Me = Li, Na, K) ferro-chromo-manganites is measured via dynamic calorimetry in the temperature interval of 298.15–673 K on an IT-S-400 apparatus. The values of C ° p ( T ) and thermodynamic functions H °( T )– H °(298.15), S °( T ), and Φ xx ( T ) are calculated. The temperature dependences of the electrical capacity ( C ), dielectric permeability (ε) and electrical resistivity ( R ) studied in the temperature range of 293–483 K show that these materials are also of interest for microelectronics.

The main tendency in the development of microelectronics is miniaturization and increase in the speed of various devices. For storage devices, such as dynamic and static RAM, based on capacitive components (capacitors), this means that as the size of the capacitor decreases, its capacitance must remain the same [1].The cuprates of REE are actively studied primarily as objects of high-temperature superconductivity (HTSC) compounds, cathode materials and catalysts. Lanthanum nickelites are promising materials as fuel cell cathodes.The problems of synthesis and X-ray analysis of new nano-sized nickelite-cuprate-manganites of the composition (LaMe2NiCuMnO6)-Ni-I where (Me-I-Li, Na, K) are considered for the first time in this paper.The nickelite-cuprate-manganites of the composition (LaMe2NiCuMnO6)-Ni-I (Me - Li, Na, K) are synthesized by solid-phase interaction in the range 800-1200 degrees C from the oxides of lanthanum (III), nickel (II), copper (II), manganese (III) and lithium, sodium and potassium carbonates. Their nanoscale (nanoclusters) particles were obtained by grinding them on a vibratory mill "MM301" from Retsch (Germany). On the electron microscope "JSPM-5400" Scanning Probe Microscope "JEOL" (Japan) their sizes are determined. By X-ray diffraction analysis of compounds on the DRON-2.0 diffractometer and the indication of their X-ray diffraction patterns, analytical methods were used to determine the types of syngony and the parameters of the grids of the synthesized new phases: LaLi2NiCuMnO6 (cub.) - a=13,83 +/- 0,02 angstrom, V degrees=2644,16 +/- 0,06 angstrom(3), Z=4, V degrees (el.cell)=661,04 +/- 0,02 angstrom(3), (rho X-ray)=4,03 g/cm(3); LaNa2NiCuMnO6 (cub.) - a=14,19 +/- 0,02 angstrom, V degrees=2859,42 +/- 0,06 angstrom(3), Z=4, V degrees (el.cell)=714,86 +/- 0,01 angstrom(3), (rho X-ray)=3,38 g/cm(3); LaK2NiCuMnO6 (cub) - a=15,17 +/- 0,02 angstrom, V degrees=3492,0 +/- 0,06 angstrom(3), Z=4, V degrees( el.)(cell)=873,0 +/- 0,01 angstrom(3), rho(X-ray)=3,70 g/cm(3).

Zincate-manganites with the composition NdM2IIZnMnO6 (MII− Mg, Ca) were synthesized using ceramic technology from oxides of Nd (III), Zn (II), Mn (III) and carbonates of alkaline-earth metals - magnesium and calcium. X-ray patterns of the prepared substancies were measured on a DRON-2.0 diffractometer. We established that they crystallize in the cubic system with the following unit cell parameters: NdMg2ZnMnO6 – а=13.927±0.035 Å, Z = 4, V0 = 2701.36±0.11 Å3, V0el.cell. = 675.34±0.03 Å3, ρX-ray = 4.20, ρpycn. = 4.19±0.01 g/cm3; NdCa2ZnMnO6 – а=13.910±0.030 Å, Z = 4, V0 = 2691.45±0.10 Å3, V0el.cell. = 672.86±0.03 Å3, ρX-ray = 4.04, ρpycn. = 4.01±0.08 g/сm3. The temperature dependence of the heat capacity of NdMg2ZnMnO6 and NdCa2ZnMnO6 was studied by dynamic calorimetry in the range of 298.15-673 K on the IT-S-400 calorimeter. Five parallel experiments were performed at each temperature point with 25 K step. The results were averaged and analyzed using mathematical statistics. As a result of calorimetric studies of the heat capacity, within the temperature range of 298.15-673 K, we discovered on the curves of the temperature dependence of heat capacity the phase transitions of the II kind at the following temperatures: 373, 548 К- NdMg2ZnMnO6, 448, 573 К – NdCa2ZnMnO6. These phase transitions were probably due to Schottky effects -the transition from semiconductivity to metallic conductivity, and variations in capacity, dielectric permittivity, the occurrence of Curie or Neel points. The equations of the temperature dependence of the heat capacity were derived on the basis of the experimental values with account the temperatures of the phase transitions. By the ion increment method, we calculated the standard entropies of the compounds investigated. We calculated the temperature dependences of С°р(Т) and thermodynamic functions Н°(Т)-Н°(298.15), S°(T) and Фхх(Т).Forcitation:Kasenov B.K., Kasenova Sh.B., Sagintaeva Zh.I., Kuanyshbekov Е.Е., Turtubaeva М.О. Synthesis and study of thermodynamic properties of new zincate-manganites NdM2IIZnMnO6 (MII − Mg, Ca). Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 3. P. 16-20