FORMS AND STATURE CRYSTALS

Forms crystals
The shape of each crystal is not samasatu against the other, but the crystals have a wide variety of forms. Crystalline form is perwujutan all crystal planes that have the same relative position to the areas of symmetry or axes of symmetry.
There are 3 forms of crystals, namely:
1. The basic form (singular), is a crystalline form in which all the existing field has the same relation to the axis of the crystal, except the prisms where the plane perpendicular to the c axis; base field is not taken into account.
2. The form of the combination is a combined form of one or more of the forms of different basis that will form a new shape. The new form is the result of the combination.
3. Form a twin crystal form consisting of two or more of the same form which would be a new form.



Stature Crystals
Many minerals have a perfect crystal form, when in its formation there is any disturbance. In the wild are rare forms of perfect crystals, for it used the term stature crystals. Crystal stature means the typical shape of a crystal is determined by the built areas, including the size of the crystal. Wake of a crystal shape really looks not perfect shape crystal owned it since in the wild in the state of the crystalline and amorphous group.
As mentioned above, the crystal stature is not a fixed crystal characteristics, because its shape is strongly influenced by environmental conditions during crystal formation occurs. Nevertheless been known that the crystal stature often seen in certain types of minerals, so that stature is also a hallmark crystals that can be used in the determination of the type of mineral.
The terms for the determination of crystal physique that is widely used is divided into 3 parts, among others:
1. The term for solitary crystals:
a. Capillary (become like hair), such as hair.
b. Filliform (fibrous), like a thread.
c. Acicular (menjarum), such as needles.
d. Bladed (membilah), such as a knife.
e. Tabular (memapan), such as books; flat.
f. Lamellar (layering), such as layered.
g. Foliated (mendaun), like leaves; thin sheets.
h. Plumose (membulu), like a feather.
i. Blocky (membata), such as bricks.
j. Columnar (meniang), such as a pole; column / pillar.
2. The term for clustered crystals:
a. Columnar (meniang), groups such as masts.
b. Bladed (membilah), like a bunch of wooden planks.
c. Fibrous (menyerat), as sekelompo fibers.
d. Recticulated (capture), such as a net or network.
e. Divergent (scatter), like a fan.
f. Radiated (menjari), such as fingers.
g. Stellated (starred), like a star.
h. Dendritic (mendendrit) like a tree.
i. Collorm (rounded-round).
3. The term for crystal-shaped round.
a. Batryoidal, such as fruit menteng / wine.
b. Reniform, such as the kidneys.
c. Mammillary, bleak breasts.
d. Globular, like a ball.
e. Granular, such as granules.
f. Pisolitic, such as peanut granules.
g. Oolitic, just as fish eggs.

Besides the above terms, of course, there are other terms that are similar, or other division by categories. It is still possible because the source is different.