• ## Tetragonal crystal system - Wikipedia

en.wikipedia.org/wiki/Tetragonal_crystal_system In crystallography, the tetragonal crystal system is one of the 7 crystal systems. Tetragonal crystal lattices result from stretching a cubic lattice along one of its lattice vectors, so that the cube becomes a rectangular prism with a square base ( a by a) and height ( c, which is different from a ).
• ## tetragonal system | Definition & Facts | Britannica

www.britannica.com/science/tetragonal-system Tetragonal system, one of the structural categories to which crystalline solids can be assigned. Crystals in this system are referred to three mutually perpendicular axes, two of which are equal in length. crystal systems The seven primitive crystal systems. Encyclopædia Britannica, Inc. If the atoms or atom groups in the solid are represented by points and the points are connected, the resulting lattice will consist of an orderly stacking of blocks, or unit cells.
• ## Donald B Peck - Crystallography: The Tetragonal System

www.mindat.org/article.php/2874/Crystallography%3A+The+Tetragonal+System The crystal appears to be Isometric Tetrahedral . . . in reality one of the three axes is slightly longer, and the crystal is Tetragonal Scalenohedral. There are some 300 minerals that crystallize in the Tetragonal System (2018). Approximately 175, more than half, are classified in the Ditetragonal Dipyramidal Class.
• ## Tetragonal Crystal System I - metafysica.nl

www.metafysica.nl/tetragonal.html The Tetragonal Crystal System differs from the Isometric System in the fact that one of its three axes of its axial system stands out, and can be interpreted as the main axis. This means that crystals (grown in a homogeneous environment) either are flattened or elongated.
• ## Amethyst Galleries - THE TETRAGONAL SYSTEM

www.galleries.com/minerals/symmetry/tetragon.htm The tetragonal system is the least populated by natural crystalsof all the crystallographic systems. The basic setup is similar to theisometric systemin that all angles between the crystallographic axes are 90degrees. The difference between the isometric system and the tetragonalsystem is that one of the three axes is longer or shorter than the othertwo.
• ## Minerals in the Tetragonal crystal system - Mindat.org

www.mindat.org/system_search.php Minerals in the Tetragonal crystal system. Abernathyite Abswurmbachite Adranosite Adranosite-(Fe) Åkermanite Alumoåkermanite Alumovesuvianite Aminoffite Ammonioleucite Ammoniomathesiusite Anatase Andymcdonaldite Anyuiite Apuanite Arapovite Archerite Argutite Armellinoite-(Ce) Arsenohauchecornite Arsenotučekite Arsenudinaite
• ## Tetragonal Minerals

www.minerals.net/minerals-Tetragonal-crystal_group.aspx Chemical Group: Crystal Group: Color: Streak: Hardness: ...
• ## Crystal systems and Bravais lattices

www.periodni.com/crystal-systems-and-bravais-lattices.html Minerals of the tetragonal crystal system are referred to three mutually perpendicular axes. The two horizontal axes are of equal length, while the vertical axis is of different length and may be either shorter or longer than the other two. a = b ≠ c. α = β = γ = 90°. Volume of unit cell.
• ## Crystal system - Wikipedia

en.wikipedia.org/wiki/Crystal_system In three dimensions, the crystal families and systems are identical, except the hexagonal and trigonal crystal systems, which are combined into one hexagonal crystal family. In total there are six crystal families: triclinic, monoclinic, orthorhombic, tetragonal, hexagonal, and cubic.
• ## The Seven Crystal Systems Information

www.crystalage.com/crystal_information/seven_crystal_systems The seven crystal systems are a method of classifying crystals according to their atomic lattice or structure. The atomic lattice is a three dimensional network of atoms that are arranged in a symmetrical pattern. The shape of the lattice determines not only which crystal system the stone belongs to, but all of its physical properties and appearance.