Arkansas Democrat Gazette-I am very upset that I buy newspapers every Sunday. I am very upset that I buy newspapers every Sunday and pay $2.00 and always get coupons and this week the week before Christmas there are none!
Definitions. Cleavage-The tendency of a mineral to break along flat planar surfaces as determined by the structure of its crystal lattice. These two-dimensional surfaces are known as cleavage planes and are caused by the alignment of weaker bonds between atoms in the crystal lattice.leavage and fracture describe different ways in which a mineral can break. Cleavage-The tendency of a mineral to break along flat planar surfaces as determined by the structure of its crystal lattice.
When describing cleavage it is also necessary to describe the angle between the cleavage planes. If, for example, a mineral is in the shape of a cube the angle between the cleavage planes should be 90Â°. If, however, the angle is not 90Â° the mineral will no longer have a cubic shape. Below is a brief chart describing the shapes associated with certain cleavages.