Mineral Resources in Egypt (II): Non-metallic Ore Deposits
It is a granular material, and in addition to high percentage of silica minerals, silica sand may contain low levels of deleterious impurities such as clay, iron oxides, titania and refractory minerals. ... Grabau AW (1920) Geology of the non-metallic mineral deposits other than silicates. Principles of salt deposition, vol 1. McGraw-Hill, …