Institute of Complex Development of Mineral Resources

Karagandy, Kazakhstan

Institute of Complex Development of Mineral Resources

Karagandy, Kazakhstan
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Bissengaliyeva M.R.,Institute of Complex Development of Mineral Resources | Bekturganov N.S.,National Scientific Technological Holding parasat | Gogol D.B.,Institute of Complex Development of Mineral Resources | Taimassova S.T.,Karaganda State University | And 2 more authors.
Journal of Chemical and Engineering Data | Year: 2013

The investigation of a magnetic component of the heat capacity of natural samples of copper sulfates antlerite Cu3SO4(OH) 4 in the temperature range below 40 K and brochantite Cu 4SO4(OH)6 below 55 K has been carried out. A regular component of the heat capacity has been calculated from experimental data of adiabatic calorimetry. In the low-temperature area of (0 to 55) K two peaks of magnetic heat capacity for brochantite have been registered. The contributions of anomalous component ΔStr into entropy of the minerals are (11 ± 3) J·mol-1·K-1 for antlerite and (5.3 ± 1.5) J·mol-1·K -1 for brochantite. © 2013 American Chemical Society.


Bissengaliyeva M.R.,Institute of Complex Development of Mineral Resources | Bekturganov N.S.,JSC National Scientific Technological Holding Parasat | Gogol D.B.,Institute of Complex Development of Mineral Resources
Journal of Thermal Analysis and Calorimetry | Year: 2010

The temperature dependence of heat capacity of a natural zinc silicate, hemimorphite Zn4Si2O7(OH)2• H2O, over the temperature range 5-320 K has been investigated by the method of low-temperature adiabatic calorimetry. On the basis of the experimental data on heat capacity over the whole temperature interval, its thermodynamic functions C p (T), S(T) and H(T) - H(0) have been calculated. The existence of a phase transition in the area of 90-105 K determined on the basis of vibrational spectra has been confirmed, and changes of entropy ΔS tr. and enthalpy ΔH tr. of the phase transition have been calculated. Hemimorphite heat capacity has also been determined by the calculation methods according to the valence force field model in LADY program. The values of force constants of valence bonds and angles have been calculated by semi-empirical method PM5. The calculated IR and Raman spectra concordant with the experimental spectra have been obtained. The heat capacity values calculated according to the found vibrational states satisfactorily agree with those experimentally obtained with an accuracy of ±1.7% in the area of 120-200 K, and not more than ±0.8% for the interval of 200-300 K. This fact testifies that the calculation of thermodynamic characteristics is correct. © 2010 Akadémiai Kiadó, Budapest, Hungary.


Bissengaliyeva M.R.,Institute of Complex Development of Mineral Resources | Bespyatov M.A.,RAS Nikolaev Institute of Inorganic Chemistry | Gogol D.B.,Institute of Complex Development of Mineral Resources
Journal of Chemical and Engineering Data | Year: 2010

The heat capacity of natural lead molybdate (wulfenite, PbMoO4) has been measured by the method of vacuum adiabatic calorimetry over the temperature range of (55 to 320) K, and its thermodynamic functions have been calculated. The obtained standard values are as follows: Cp°(298. 15) = (119.41 ± 0.13) J·mol-1·K-1, S°(298.15) = (168.33 ± 2.06) J·mol-1·K -1, ΔH° = (23 095 ± 50) J·mol-1. For extrapolation of heat capacity values to absolute zero, the equation C(T) = (AT-1/αβ + 1)-1/α has been used, where parameter α is the power at which the heat capacity verges toward the Dulong and Petit limiting value, and parameter β reflects structural anisotropy of the compound and can possess values from 1 to 3. The values of parameters found by means of linearization were α = 0.61 and β = 1.9. An error for the extrapolation data to absolute zero has been estimated based on the results of heat capacity measurements of the isostructural compound calcium tungstate, CaWO4. The values of the wulfenite heat capacity over the range of (0 to 55) K have also been calculated by the semiempirical method MNDO with the help of a program package on quantum-chemical computation (MOPAC) and according to the method of interatomic potentials within the bounds of dynamics of crystal lattice theory using the computer program LADY. © 2010 American Chemical Society.


Bissengaliyeva M.R.,Institute of Complex Development of Mineral Resources | Ogorodova L.P.,Moscow State University | Mel'Chakova L.V.,Moscow State University | Vigasina M.F.,Moscow State University
Journal of Thermal Analysis and Calorimetry | Year: 2012

Thermal and thermochemical investigations of natural hydroxyl-bearing copper sulfate Cu 3SO 4(OH) 4-antlerite have been carried out. The stages of its thermal decomposition have been studied employing the Fourier-transform IR spectroscopy. The enthalpy of formation of antlerite from the elements Δ f H m o (298.15 K) = (-1750 ± 10) kJ mol -1 has been determined by the method of oxide melt solution calorimetry. Using value of S m o (298.15 K), equal to (263.46 ± 0.47) J K -1mol -1, obtained earlier by the method of adiabatic calorimetry, the Gibbs energy value of Δ f G m o (298.15 K) = (-1467 ± 10) kJ mol -1 has been calculated. © 2011 Akadémiai Kiadó, Budapest, Hungary.


Bissengaliyeva M.R.,Institute of Complex Development of Mineral Resources | Gogol D.B.,Institute of Complex Development of Mineral Resources | Bekturganov N.S.,Science National Scientific Technological Holding Parasat
Thermochimica Acta | Year: 2012

The investigation of the heat capacity of a natural specimen of copper phosphate - pseudo-malachite Cu 5(PO 4) 2(OH) 4 in the temperature range between 4.2 K and 320 K has been carried out by the method of low-temperature adiabatic calorimetry. Tabulated values of the heat capacity and thermodynamic functions of the mineral including the changes of entropy and enthalpy and the Gibbs function of free energy have been calculated. The standard values of thermodynamic functions of pseudo-malachite at T = 298.15 K are Cp,m°=(385.430.41)Jmole -1K -1, Δ0TSm°=(412.160.61)Jmole -1K -1, Δ0THm°=(63681.557.0)Jmole -1, Fm°=(198.570.47)Jmole -1K -1. In the low-temperature area 0 < (T/K) < 22.69 an anomaly has been registered in the variation of the heat capacity of the mineral, for which the lattice constituent has been determined. The contribution of anomalous component into entropy and enthalpy of the mineral is ΔS tr = (5.772 ± 0.081) J mole -1 K -1, ΔH tr = (29.94 ± 0.42) J mole -1. © 2010 Elsevier B.V. All rights reserved.


PubMed | Institute of Complex Development of Mineral Resources
Type: Journal Article | Journal: Journal of chemical and engineering data | Year: 2013

The investigation of a magnetic component of the heat capacity of natural samples of copper sulfates antlerite Cu


Bissengaliyeva M.R.,Institute of Complex Development of Mineral Resources | Gogol D.B.,Institute of Complex Development of Mineral Resources | Taimassova S.T.,Institute of Complex Development of Mineral Resources | Bespyatov M.A.,RAS Nikolaev Institute of Inorganic Chemistry | Zhusipov A.A.,ZINC Inc
Journal of Chemical and Engineering Data | Year: 2011

The heat capacity of natural lead molybdate (wulfenite, PbMoO4) has been measured by the method of vacuum adiabatic calorimetry over the temperature range of (4.3 to 80) K, and its thermodynamic functions in the range from (0 to 320) K have been calculated. The obtained standard values are as follows: Cpo(298.15) = (119.4 ± 0.13) J·mol -1·K-1, S°(298.15) = (161.5 ± 0.3) J·mol-1·K-1, and ΔH°(298.15) = (23018 ± 23) J·mol-1. The experimental data have been compared with the calculated values of the heat capacity obtained previously by different methods. The greatest correspondence of the thermodynamic functions has been obtained when employing the method of interatomic potentials using the computer program LADY. © 2011 American Chemical Society.


Bissengaliyeva M.R.,Institute of Complex Development of Mineral Resources | Gogol D.B.,Institute of Complex Development of Mineral Resources | Taymasova S.T.,Institute of Complex Development of Mineral Resources
Journal of Chemical and Engineering Data | Year: 2011

Measurements of the heat capacity of standard specimens of copper, benzoic acid, and heptane and their thermodynamic functions of molar heat capacity, change in entropy, and enthalpy have been carried out at a low-temperature thermal-physical installation in the temperature range (4.2 up to 320) K using the method of adiabatic calorimetry. The obtained data are in good agreement with the recommended values. The relative uncertainty limits of the calorimetric unit: ± 1.43 % at T = 5 K, ± 0.75 % at T = 10 K, ± 0.23 % at T = 40 K, and less than ± 0.11 % for the temperature range (90 up to 298.15) K have been determined according to the experimental data of measurements of the certified measure of oxygen-free electronic (OFE) grade copper heat capacity. According to the heptane heat capacity measurement, the values of its enthalpy and entropy of fusion at Tfus = 182.54 K, ΔHfus = (14047 ± 19.6) J•mol-1 and ΔSfus = (76.96 ± 0.11) J•mol -1•K-1, have been determined. These values are also in a satisfactory agreement with the reference data. © 2011 American Chemical Society.

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