Selenium hexafluoride is the inorganic compound with the formula SeF6. It is a colourless gas described as having a `repulsive` odor. It is not widely encountered and has no commercial applications. ==Structure, preparation, and reactions== Like many compounds of selenium, SeF6 is hypervalent. The compound has octahedral molecular geometry with ..... Found on http://en.wikipedia.org/wiki/Selenium_hexafluoride