Synthetic and characterization of Na-tetrasilicic fluorine mica by skull melting method

Na-tetrasilicic fluorine mica powders were synthesized by skull melting method. The staring materials having chemical composition of mol% were charged into a cold crucible of 13 cm in diameter and 14cm in height and heated by R.F. generator at working frequency of 2.84 MHz. The materials were maintained for 1hr as a molten state and cooled down in the container. In this study, the specific electric resistance of mica was estimated and the columnar and plate shaped mica were synthesized.