Trikliniset

Trikliniset is a term used in crystallography to describe a crystal system. Crystals belonging to the triclinic system are characterized by having the least symmetry. In the triclinic system, all three crystallographic axes are of unequal lengths, and the angles between these axes are not right angles and are unequal to each other. This means that there are no inherent symmetries such as rotational axes or mirror planes that relate different parts of the crystal structure in a simple way. Consequently, triclinic crystals are often described as having no symmetry elements, other than the identity operation. Despite their low symmetry, triclinic crystals can exhibit a wide variety of forms and are found in many mineral groups. Examples of minerals that crystallize in the triclinic system include plagioclase feldspars, kyanite, and rhodonite. The unit cell of a triclinic crystal is defined by three lattice parameters, a, b, and c, representing the lengths of the axes, and three interaxial angles, alpha, beta, and gamma, which describe the angles between these axes. The defining characteristic is that a ≠ b ≠ c and α ≠ β ≠ γ ≠ 90°.