List of frequently used symbols and abbreviations.- Magnetic and related properties of silicates and phosphates.- Apophyllite-type silicates.- Natrosilites and related silicates.- Pyrophyllite, talc and related silicates.- True micas.- Brittle micas and related silicates.- Interlayer deficient micas, stilpnomelane, ganophyllite group and related silicates.- Smectites and related silicates.