Symmetry Lab › Point groups › Td
Td point group
The full symmetry of a regular tetrahedron: four C3 axes, three C2 axes (each also an S4 axis) and six dihedral mirror planes. There is no centre of inversion.
- Family
- Tetrahedral (T, Tₕ, Td)
- Order
- 24
- Operations
- E, 8C₃, 3C₂, 6S₄, 6σd
- Molecules in the lab
- 28
Td molecules
| Molecule | Shape | Atoms | 3D model |
|---|---|---|---|
| P₄White phosphorus | Tetrahedron of atoms | 4 | Open in 3D → |
| NH₄⁺Ammonium ion | Tetrahedral | 5 | Open in 3D → |
| CCl₄Carbon tetrachloride | Tetrahedral | 5 | Open in 3D → |
| CrO₄²⁻Chromate ion | Tetrahedral | 5 | Open in 3D → |
| CH₄Methane | Tetrahedral | 5 | Open in 3D → |
| OsO₄Osmium tetroxide | Tetrahedral | 5 | Open in 3D → |
| ClO₄⁻Perchlorate ion | Tetrahedral | 5 | Open in 3D → |
| MnO₄⁻Permanganate ion | Tetrahedral | 5 | Open in 3D → |
| PO₄³⁻Phosphate ion | Tetrahedral | 5 | Open in 3D → |
| SiH₄Silane | Tetrahedral | 5 | Open in 3D → |
| SiF₄Silicon tetrafluoride | Tetrahedral | 5 | Open in 3D → |
| SO₄²⁻Sulfate ion | Tetrahedral | 5 | Open in 3D → |
| AlCl₄⁻Tetrachloroaluminate ion | Tetrahedral | 5 | Open in 3D → |
| [CoCl₄]²⁻Tetrachlorocobaltate(II) ion | Tetrahedral | 5 | Open in 3D → |
| [FeCl₄]⁻Tetrachloroferrate(III) ion | Tetrahedral | 5 | Open in 3D → |
| [ZnCl₄]²⁻Tetrachlorozincate ion | Tetrahedral | 5 | Open in 3D → |
| BF₄⁻Tetrafluoroborate ion | Tetrahedral | 5 | Open in 3D → |
| BH₄⁻Tetrahydridoborate ion | Tetrahedral | 5 | Open in 3D → |
| SnCl₄Tin(IV) chloride | Tetrahedral | 5 | Open in 3D → |
| TiCl₄Titanium(IV) chloride | Tetrahedral | 5 | Open in 3D → |
| XeO₄Xenon tetroxide | Tetrahedral | 5 | Open in 3D → |
| C₄H₄Tetrahedrane | Tetrahedron of CH units | 8 | Open in 3D → |
| Ni(CO)₄Nickel tetracarbonyl | Tetrahedral | 9 | Open in 3D → |
| P₄O₆Phosphorus(III) oxide | Adamantane-like cage | 10 | Open in 3D → |
| P₄O₁₀Phosphorus(V) oxide | Adamantane-like cage | 14 | Open in 3D → |
| C(CH₃)₄Neopentane | Central C with four methyls | 17 | Open in 3D → |
| Si(CH₃)₄Tetramethylsilane (TMS) | Central Si with four methyls | 17 | Open in 3D → |
| C₁₀H₁₆Adamantane | Three fused chairs (diamond fragment) | 26 | Open in 3D → |