An irregular dodecahedron.
Trigonal Dodecahedron
See also
Dodecahedron, Pyritohedron, Rhombic DodecahedronExplore with Wolfram|Alpha
References
Cotton, F. A. Chemical Applications of Group Theory, 3rd ed. New York: Wiley, p. 62, 1990.Referenced on Wolfram|Alpha
Trigonal DodecahedronCite this as:
Weisstein, Eric W. "Trigonal Dodecahedron." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/TrigonalDodecahedron.html