Crystallization and properties of glasses based on diopside-Ca-Tschermak's-fluorapatite system

The thermal expansion coefficients (α-values) and microhardness of the glasses and glass-ceramics were determined. The data of the glasses were correlated to the internal structure of the glasses, nature and role played by glass forming cations. However, the properties of the crystalline glasses were mainly attributed to different factors including the crystalline phases formed, residual glassy phase and the microstructures.