A smooth, flat break in a crystal parallel to a cleavage plane is called:

A smooth, flat break in a crystal parallel to a cleavage plane is called:

• A. Crystal
• B. Bond
• C. Cleavage Plane
• D. Cleavage

Answer: (D)

Cleavage is the tendency of a mineral to break along flat, parallel planes of weakness in its crystal lattice. When the break is smooth and flat and runs parallel to one of these planes, the surface produced is a cleavage surface, and the process is called cleavage. This distinguishes it from fracture, which would produce irregular, uneven surfaces. The terms “crystal” and “bond” describe the mineral’s structure and the atomic connections, while a “cleavage plane” is the plane itself where cleavage can occur.

Cleavage is the tendency of a mineral to break along flat, parallel planes of weakness in its crystal lattice. When the break is smooth and flat and runs parallel to one of these planes, the surface produced is a cleavage surface, and the process is called cleavage. This distinguishes it from fracture, which would produce irregular, uneven surfaces. The terms “crystal” and “bond” describe the mineral’s structure and the atomic connections, while a “cleavage plane” is the plane itself where cleavage can occur.