Chemistry Reference and  Research
           
 
Periodic Table
- standard table
- large table
 
Chemical Elements
- by name
- by symbol
- by atomic number
 
Chemical Properties
 
Chemical Reactions
 
Organic Chemistry
 
Branches of Chemistry
Analytical chemistry
Biochemistry
Computational Chemistry
Electrochemistry
Environmental chemistry
Geochemistry
Inorganic chemistry
Materials science
Medicinal chemistry
Nuclear chemistry
Organic chemistry
Pharmacology
Physical chemistry
Polymer chemistry
Supramolecular Chemistry
Thermochemistry

Truncated tetrahedron

Truncated tetrahedron
Truncated tetrahedron
Click on picture for large version.
Click here for spinning version.
TypeArchimedean
Faces4 triangles
4 hexagons
Edges18
Vertices12
Vertex configuration3,6,6
Symmetry grouptetrahedral (Td)
Dual polyhedrontriakis tetrahedron
Propertiesconvex, semi-regular (vertex-uniform)

The truncated tetrahedron is an Archimedean solid. Canonical coordinates for the vertices of a truncated tetrahedron centered at the origin are (±3, ±1, ±1), (±1, ±3, ±1), (±1, ±1, ±3), where the ± has the same parity for each coordinate, that is, all coordinates have an even number of minuses (or all have an odd number).


It has 4 regular hexagonal faces, 4 regular triangular faces, 12 vertices and 18 edges.

A famous depiction of an irregular truncated tetrahedron is in Albrecht Dürer's engraving, "Melencolia I". See illustration at entry Melancholy.

See also

External links

01-04-2007 01:16:19
The contents of this article are licensed from Wikipedia.org under the GNU Free Documentation License. How to see transparent copy