What is the molecular geometry of SF4?

The basic structure of the molecule SF4, or sulfur tetrafluoride, is one sulfur atom bonded to four flouride atoms, with two of the sulfur's valence electrons free. In three dimensions, the specific geometrical formation the bonds and lone pair of electrons take gives SF4 the appearance of a seesaw-like top.

Sulfur tetrafluoride exists as a caustic gas at room temperature, reacting with water to form sulfur and hydrofluoric acid, a solution of hydrogen fluoride in water. Hydrogen fluoride boils near room temperature and is highly caustic; however, it is an important chemical in many fields, including pharmaceuticals, electronics, farming, artificial compounds and petrochemical.