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What (who) is tetrahedral$82583$ - definition
Inverted tetrahedral geometry; Tetrahedral geometry; Tetrahedral complex ion; Tetahedral molecular geometry; Tetrahedral coordination geometry; Examples of tetrahedral structures; Tetrahedral molecule; Tetrahedrally; Tetrahedral complex
![Ga2Cl6}} ("[[gallium trichloride]]").](https://commons.wikimedia.org/wiki/Special:FilePath/Gallium-trichloride-from-xtal-2004-3D-balls.png?width=200 "Ga2Cl6}} (\"[[gallium trichloride]]\").")
![<!-- specify width as minus sign vanishes at most sizes --> Calculating bond angles of a symmetrical tetrahedral molecule using a [[dot product]]](https://commons.wikimedia.org/wiki/Special:FilePath/Tetrahedral angle calculation.svg?width=200 "<!-- specify width as minus sign vanishes at most sizes --> Calculating bond angles of a symmetrical tetrahedral molecule using a [[dot product]]")
Pyritohedral
![volleyball]] have pyritohedral symmetry](https://commons.wikimedia.org/wiki/Special:FilePath/Volleyball seams diagram.png?width=200 "volleyball]] have pyritohedral symmetry")
3D SYMMETRY GROUP
Tetrahedral group; Pyritohedral; Pyritohedral symmetry; Full tetrahedral symmetry; Achiral tetrahedral symmetry; Chiral tetrahedral symmetry; 332 symmetry; Pyritohedral group
·adj Like pyrites in hemihedral form.
Tetrahedral prism
UNIFORM 4-POLYTOPE
Tetrahedral hyperprism
In geometry, a tetrahedral prism is a convex uniform 4-polytope. This 4-polytope has 6 polyhedral cells: 2 tetrahedra connected by 4 triangular prisms.
Order-6 tetrahedral honeycomb
![Subgroup relations]]](https://commons.wikimedia.org/wiki/Special:FilePath/Hyperbolic subgroup tree 336-direct.png?width=200 "Subgroup relations]]")
In hyperbolic 3-space, the order-6 tetrahedral honeycomb is a paracompact regular space-filling tessellation (or honeycomb). It is paracompact because it has vertex figures composed of an infinite number of faces, and has all vertices as ideal points at infinity.
Wikipedia
Tetrahedral molecular geometry
In a tetrahedral molecular geometry, a central atom is located at the center with four substituents that are located at the corners of a tetrahedron. The bond angles are cos−1(−1⁄3) = 109.4712206...° ≈ 109.5° when all four substituents are the same, as in methane (CH4) as well as its heavier analogues. Methane and other perfectly symmetrical tetrahedral molecules belong to point group Td, but most tetrahedral molecules have lower symmetry. Tetrahedral molecules can be chiral.
