Prepd by fluorination of bromine at +80°: Lebeau, Compt. Rend. 141, 1018 (1905); Prideaux, J. Chem. Soc. 89, 316 (1906); Ruff, Braida, Z. Anorg. Allg. Chem. 206, 59 (1932); 214, 91 (1933); Simons, Inorg. Synth. 3, 184 (1950); Kwasnik in Handbook of Preparative Inorganic Chemistry Vol. 1, G. Brauer, Ed. (Academic Press, 2nd ed., 1963) pp 156-157. Reviews: Kemmitt, Sharp, Adv. Fluorine Chem. 4, 244-245 (1965); Stein, “Physical and Chemical Properties of Halogen Fluorides” in Halogen Chemistry Vol. 1, V. Gutmann, Ed. (Academic Press, New York, 1967) pp 133-224; Meinert, Z. Chem. 7, 41-57 (1967).