| These are, in order of decreasing symmetry, the cubic, hexagonal, tetragonal, trigonal, orthorhombic, monoclinic, and triclinic systems. |
| Small, black, tetragonal anatase crystals associated with rutile were found on microcline by Kile. |
| Some of these larger crystals are elongate, giving them a tetragonal rather than cubic appearance. |
| Narsarsukite is another tetragonal mineral that can show a tetragonal prismatic habit, particularly when it develops in open cavities. |
| RyRs are disposed in a tetragonal arrangement, and groups of four DHPRs, or tetrads, are associated with alternate RyRs, forming a related array. |
| Martensite is a supersaturated solid solution of carbon in iron which has a body-centred tetragonal structure, a distorted form of bcc iron. |
