polarisation of the electron core of the barium atom creates an approximately tetrahedral distribution of charge that interacts with the Ba-F bonds. References Cited sources External links MSDS at Oxford University Barium compounds Fluorides Optical materials Phosphors and scintillators Crystals Alkaline earth metal halides Fluorite crystal structure ar:فلوريد باريوم de:Bariumfluorid it:Fluoruro di bario nl:Bariumfluoride pl:Fluorek baru ru:Фторид бария zh:氟化钡