dubbelpyramider

Dubbelpyramider, also known as double pyramids or bipyramids, are a class of chemical compounds and mineral structures characterized by the presence of two pyramids joined at their bases. This geometric arrangement is particularly relevant in crystallography and coordination chemistry. In the context of minerals, the term often refers to specific crystal habits or forms where two pyramidal faces are present on opposite sides of a crystal.

In coordination chemistry, a dubbelpyramider refers to a central atom or ion that is bonded to six ligands, with these ligands arranged in a trigonal bipyramidal geometry. This geometry is a common coordination polyhedron. The six atoms surrounding the central atom are positioned at the vertices of a triangular bipyramid. Three atoms lie in an equatorial plane, forming an equilateral triangle around the central atom, while the remaining three atoms are located above and below this plane, at the axial positions.

Examples of compounds exhibiting this coordination can be found in various transition metal complexes. The stability and electronic properties of these dubbelpyramider complexes are influenced by factors such as the nature of the central atom and the ligands involved. The concept of the dubbelpyramider is fundamental to understanding the three-dimensional structure and reactivity of many chemical substances.