Tag «hexagonal crystal system»

Hexagonal Crystal System

The hexagonal system, one of the principal categories of crystal systems, in which the components of crystals are located by reference to four axes; three of these axes are of equal length and set at 120° to one another and a fourth axis is perpendicular to the plane of the other three axes. If the …

Six types of Crystal Systems

There are hundreds of minerals on the earth, which are found in different crystal forms. These crystal forms are grouped into six major crystal forms. These crystal forms are as follows. (1). Cubic or Isometric Crystal System: The crystals belonging to this system have three mutually perpendicular axes of equal lengths. These axes are designated …

Nepheline Mineral

Nepheline: Nepheline found in gneiss rock Nepheline is the most abundant mineral of the feldspathoid group, which is abundantly found in the syenite igneous rocks of the volcanic eruption. Nepheline contains Sodium or Potassium with AlSiO4. Its chemical formula is (Na,K)AlSiO4. Some important physical properties of nepheline are as under; Physical Properties of Nepheline: It is vitreous greasy luster. …