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.
Minerals with cleavage break more easily along at least one plane. Biotite mica (top left) is a mineral with one direction of cleavage. Orthoclase feldspar (top right) shows two directions of cleavage at approximately 90 degrees. Halite (bottom), or rock salt, shows three directions of cleavage at 90 degrees.