trigonalids
Trigonalids are a group of minerals that share a similar crystal structure, characterized by a triangular prismatic shape. They belong to the hexagonal crystal system and are named for their trigonal crystal symmetry. This group includes a variety of minerals with different chemical compositions, but they all exhibit the same basic crystal structure.
The trigonal crystal system is one of the seven crystal systems in mineralogy. It is defined by
One of the most well-known trigonalids is corundum, which is composed of aluminum oxide and is the
Trigonalids are typically found in igneous and metamorphic rocks, as well as in certain sedimentary environments.