Muscovite has perfect basal cleavage, or book cleavage.
Muscovite mica has perfect cleavage in one direction. It splits into thin sheets.
This is called cleavage.
A good example of a mineral with basal cleavage are those from the mica group such as muscovite and biotite
Mica minerals have only one direction of cleavage. Examples are Muscovite and Biotite.
cleavage
Muscovite mica has perfect cleavage in one direction. It splits into thin sheets.
A good example of a mineral with basal cleavage are those from the mica group such as muscovite and biotite
Muscovite mica has perfect cleavage in one direction. It splits into thin sheets.
This is called cleavage.
A good example of a mineral with basal cleavage are those from the mica group such as muscovite and biotite
Mica or silicate
Mica minerals have only one direction of cleavage. Examples are Muscovite and Biotite.
cleavage
Both are platy, silicate, mica group minerals with perfect cleavage in one direction.
Generally referred to as micaceous minerals, biotite and muscovite are silicate minerals having perfect basal cleavage. They both contain most of the same elements, just in different quantities. However, biotite is soluble in sulfuric acid and has iron and magnesium in it, where muscovite does not. They can be found in all types of rock.
Biotite (black mica) and muscovite (white mica) are both minerals that have perfect basal cleavage--one direction. It cleaves into thin sheets. Feldspars (albite, oligoclase, andesine, labradorite, bytownite, anorthite) have good cleavage in two directions at nearly right angles, poor in a third direction.
Many minerals have "cleavage" that causes them to split on flat cleavage planes. Such minerals include micas (muscovite, biotite. phlogopite), calcite, gypsum, and feldspars. Cleavage is the result of the minerals' crystal structure that has weaker chemical bonds aligned in planes.