Noun
pentafluoride (plural pentafluorides)
(inorganic chemistry) Any fluoride containing five fluorine atoms in each molecule.
Osmium pentafluoride (OsF 5 ) is known, but osmium trifluoride (OsF 3 ) has not yet been synthesized. Source: Internet
Niobium pentafluoride (NbF 5 ) is a white solid with a melting point of 79.0 °C and niobium pentachloride (NbCl 5 ) is yellow (see image at left) with a melting point of 203.4 °C. Source: Internet
Ruthenium pentafluoride is a tetrameric dark green solid that is also readily hydrolyzed, melting at 86.5 °C. Source: Internet