Question

Certain minerals usually break along flat surfaces while other minerals break unevenly the characteristics is due to the

Answer 1

The way minerals break is called cleavage. In mica for example, there is a platy cleavage thanks to the atomic structure which allows it to break along flat, parallel surfaces. Quartz on the other hand has no cleavage so just breaks along irregular surfaces.

Answer 2

Cleavage of the mineral causes breakage of minerals unevenly along flat surfaces.

Explanation:

Cleavage refers to breaking of flat surface minerals into many surface. The crystalline structure of mineral determines the cleavage. It is the ability of crystalline materials to divide into “definite crystallographic structural planes”.  

The permanent locations of atoms and ions in crystal are the main reason for the relative weakness, which forms smooth repeating surfaces. They are visible both in the microscope and to naked eye.