Silicon dioxide, which is the most common quartz phase in nature, is also present in coesite and stisovite polymorphs. In this study, the heat capacity, one of the thermodynamic properties of silicon dioxide, which is widely used in many cosmetic products as well as being used as a raw material for glass, ceramics, semiconductors, and food industry, is discussed. The Debye temperature required to obtain the heat capacity was calculated according to the Veight-Reuss-Hill approach by taking the elastic constants of silicon dioxide, which has a tetragonal structure. The heat capacity corresponds to the amount of heat per unit mass and is one of the most fundamental thermodynamic properties of materials that varies with concentration and temperature. The heat capacity of silicon dioxide has been calculated using the n-dimensional Debye function over the temperature range 60-1000 K. The heat capacity results calculated for SiO_2 are compared with existing experimental and theoretical data. It was observed that the calculated thermal results different temperature was in better agreement with the experimental and theoretical data.

Keywords
Silicon dioxide, Debye temperature, Heat capacity, Debye function