Geochemistry of some Egyptian nepheline syenites and their utilization in glass ceramics.

Abstract

Glass-ceramics plays a great role in the security and safety to maintain human life. It is composed of raw materials and chemical additives. The first components are naturally created in geological environment and they might influenced by the weathering conditions surrounding them. One of the important natural source for glass-ceramics is the alkaline rocks widespread in the alkaline intrusions. Abu Khruq ring complex is the type locality of the upper Cretaceous alkaline intrusions related to the alkaline province of the Southern Eastern Desert. It comprises concentric rings of syenitic rocks ranging in composition from quartz-rich syenite at the outer ring, through alkali feldspar syenite to nepheline syenite in the center. The mutual interaction between components of raw materials and chemical additives through different temperatures of heat treatment affects the physical, che