Question

if a set of equivalent crystal faces are related to each other by a three fold axis of rotation what will be angle between these faces​

Answer 1

Answer:

Definition of a Mineral

A mineral is a naturally occurring homogeneous solid with a definite (but not generally fixed) chemical composition and a highly ordered atomic arrangement, usually formed by an inorganic process.

Naturally Occurring - Means it forms by itself in nature. Human made minerals are referred to as synthetic minerals.

Homogeneous - means that it is a compound that contains the same chemical composition throughout, and cannot by physically separated into more than 1 chemical compound.

Solid - means that it not a gas, liquid, or plasma.

Definite chemical composition - means that the chemical composition can be expressed by a chemical formula.