Crystal System

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crystal system

[¦krist·əl ′sis·təm]
One of seven categories (cubic, hexagonal, tetragonal, trigonal, orthorhombic, monoclinic, and triclinic) into which a crystal may be classified according to the shape of the unit cell of its Bravais lattice, or according to the dominant symmetry elements of its crystal class.

Crystal System


any of the seven groups of crystals obtained when a classification is made according to the symmetry of the unit cell. A system is characterized by the ratios between the a, b, and c axes and by the angles α, β, and γ of the unit cell. The seven systems are cubic (a = b = c; α = β = γ = 90°), tetragonal (a = bc; α = β = γ = 90°), hexagonal (a = bc; α = β = 90°; γ = 120°), trigonal (a = b = c; α = β = γ ≠ 90°), orthorhombic (abc; α = β = γ = 90°), mono-clinic (abc; α = β = γ = 90°; β ≠ 90°), and triclinic (abc; αβγ ≠ 90°). As the broadest classification of crystal symmetry, each crystal system includes several symmetry point groups and Bravais lattices.


Popov, G. M., and I. I. Shafranovskii. Kristallografiia, 5th ed. Moscow, 1972.
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GTAT's suit, filed by subsidiaries GT Crystal Systems and GT Solar Hong Kong, charged that ARC had obtained the technology from Chandra Khattak, who used to work at Crystal Systems Inc.
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About BluePhoenix Solutions BluePhoenix Solutions, a wholly owned subsidiary of Crystal Systems, develops and markets cost-effective Enterprise IT Modernization solutions that enable their clients to extend the ROI of their existing systems through integrated Understanding, Migration, Transformation and Development tools and services.
The new name reflects the broader range of markets and technologies the company now addresses since its acquisition of Crystal Systems in July of 2010.
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GT Crystal Systems and GT Solar Hong Kong--both subsidiaries of GT Solar--charge that Advanced Renewable Energy Company LLC (ARC Energy) obtained the complicated method from Chandra Khattak.