disphenoid

crystallography

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July 19, 2026

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A disphenoid is a crystal form characterized by four triangular faces. These faces are arranged symmetrically around three mutually perpendicular axes of symmetry. This specific arrangement means that the faces of a disphenoid can be thought of as alternating pairs, similar to how alternate faces of a dipyramid are positioned. Disphenoids are found in the tetragonal and orthorhombic crystal systems.12

In crystallography, a disphenoid is a type of crystal form. It is defined by its four triangular faces, which exhibit symmetry around three perpendicular axes. This geometric configuration is a key characteristic within certain crystal systems, specifically the tetragonal and orthorhombic systems.12

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…or 4-fold axis of symmetry;Disphenoid: four-faced closed form in which the two faces of a sphenoid alternate above two faces of another sphenoid;Prism: 3, 4, 6, 8, or 12 faces the intersection lines of which are parallel and (except for some monoclinic prisms) are parallel to a principal…
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…or 4-fold axis of symmetry;Disphenoid: four-faced closed form in which the two faces of a sphenoid alternate above two faces of another sphenoid;Prism: 3, 4, 6, 8, or 12 faces the intersection lines of which are parallel and (except for some monoclinic prisms) are parallel to a principal…
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