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 you describe cleavages you will need to include both the number of cleavage directions and the angles between those cleavage directions. Examples of different types of cleavage follow. gypsum and biotite. 1) When a mineral has only one direction of cleavage it often occurs as flat plates or sheets. feldspar. 1) The two directions are parallel to the base of the specimen and vertical, such as the plane running along the left side.