Features of material constitution of quartz–feldspar ore from Quang Nam deposit in Vietnam

Feldspar is the largest group of aluminosilicate minerals making around 50% of the lithosphere mass. Feldspar is a high-value raw materials used in various industries in production of glass, ceramics, electrical insulators, abrasives, as well as an aggregate in production of plastics, paints, rubber, etc. A major source of high-grade feldspar is granitic pegmatites. The Social Republic of Vietnam possesses considerable feldspar reserves but...