A correlation matrix (presented in Figure ) was created to assess the relationships between these parameters and the acidity of oxides on the Smith scale. This analysis helps in understanding the degree of linear dependence between each pair of variables, providing insight into their potential combined effect on oxide acidity. By utilizing these four parameters, our approach aims to develop a more precise predictive model for oxide acidity, overcoming the limitations of previous linear fits. This multi-parameter model considers the complex interplay of different chemical properties, thereby offering a more comprehensive and accurate prediction of oxide acidity.