Rhombic disphenoid

A rhombic disphenoid is a type of tetrahedron with 4 identical scalene triangles as faces. Rhombic disphenoids are related to tetragonal disphenoids, and can be considered to be the digonal version of gyroprisms.

A rhombic disphenoid can generally be formed by alternating a cuboid.

Rhombic disphenoids occur as cells in any n-d step prism where both n and d are even, or if n is even and d2 is equivalent to 1 mod n and is a divisor of 2n.