Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 50827 10.2205/2022es000800 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Thermodynamic behavior of Na-majorite and knorringite-majorite garnet systems Thermodynamic behavior of Na-majorite and knorringite-majorite garnet systems Gaurav S. Gaurav S. Shankar S. Shankar S. Raghav Anamika Raghav Anamika Kumari Pratibha Kumari Pratibha Singh Manish Singh Manish Department of Applied Physics, AIAS, Amity University Noida Индия Department of Applied Physics, AIAS, Amity University Noida India Experimental Research Laboratory, Department of Applied Physics, ARSD College, University of Delhi, Dhaula Kuan New Delhi Индия Experimental Research Laboratory, Department of Applied Physics, ARSD College, University of Delhi, Dhaula Kuan New Delhi India Department of Applied Physics, AIAS, Amity University Naida Индия Department of Applied Physics, AIAS, Amity University Naida India Department of Applied Physics, AIAS, Amity University Naida Индия Department of Applied Physics, AIAS, Amity University Naida India Department of Applied Physics, AIAS, Amity University Naidaa Индия Department of Applied Physics, AIAS, Amity University Naida India 02 07 2022 02 07 2022 22 3 1 8 23 07 2021 20 11 2021 https://rjes.ru/en/nauka/article/50827/view

The behavior of thermal parameters pressure (P) and thermoelastic parameters i.e. Isothermal bulk modulus (K_T), its pressure derivative (K'T) and Thermal expansivity (α) has been analyzed for Na-majorite and knorringite-majorite systems at different compressions down to a maximum value of 0.3 for temperature ranges from 300 K to 1500 K. The pressure dependent compressibility of these garnets have been studied. The comprehensive study of thermodynamic and thermoelastic behavior at different isotherms and isobars respectively has been achieved by employing both Vinet equation of state and Anderson-Isaak equation. The study of thermal expansivity (α) using Anderson-Isaak and Stacy-Davis approach shows a similar trend of MgO system. Based on the validation of Kumar's approach, the lattice parameter of garnet system is computed using Kumar and modified Kumar's approach at high temperature and is found to be very less deviated from the value of lattice parameter at room temperature.

The behavior of thermal parameters pressure (P) and thermoelastic parameters i.e. Isothermal bulk modulus (K_T), its pressure derivative (K'T) and Thermal expansivity (α) has been analyzed for Na-majorite and knorringite-majorite systems at different compressions down to a maximum value of 0.3 for temperature ranges from 300 K to 1500 K. The pressure dependent compressibility of these garnets have been studied. The comprehensive study of thermodynamic and thermoelastic behavior at different isotherms and isobars respectively has been achieved by employing both Vinet equation of state and Anderson-Isaak equation. The study of thermal expansivity (α) using Anderson-Isaak and Stacy-Davis approach shows a similar trend of MgO system. Based on the validation of Kumar's approach, the lattice parameter of garnet system is computed using Kumar and modified Kumar's approach at high temperature and is found to be very less deviated from the value of lattice parameter at room temperature.

 This work is not funded by any research agency of India This work is not funded by any research agency of India

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