Berkelium tetrafluorideBerkelium tetrafluoride is a binary inorganic compound of berkelium and fluorine with the chemical formula.SynthesisBerkelium tetrafluoride may be formed by the fluorination of berkelium trioxide, dioxide, or trifluoride with elemental fluorine at elevated temperatures:Physical propertiesBerkelium fluoride forms light brown crystals of monoclinic crystal structure of uranium tetrafluoride type. Cell parameters: a = 1.2396 nm, b = 1.0466 nm, c = 0.8118 nm, angle β = 126.33°.Chemical propertiesBerkelium tetrafluoride is reduced by lithium at elevated temperatures to metallic berkelium: