in neat (no solvent) impured Bi2O3 is formed while heating;;

ammonia in neat (no solvent) heating in a stream of NH3;; small amounts of bismuth bromide ammoniate sublime;;

carbon in neat (no solvent) heating in a stream of Cl2;;

air in neat (no solvent) sublimation at 225°C;;

acetic acid; Na acetate in water Bi(NO3)3*5H2O dissolved in glacial acetic acid is added rapidly to a soln. of KBr and Na acetate in H2O at 65°C, after ppt. is formed, soln. is stirred for 24 h and decanted four to five times; filtn., drying at 120°C;

HBr in hydrogen bromide aq. HBr; heating a mixture of Bi2O3 and 15 percent HBr solution (Bi2O3 : HBr = 1 : 2.4) for several hours on a water bath;; heating of the precipitate with H2O on a water bath, washing with water and drying;;

in neat (no solvent) byproducts: CO2, CO; heating Bi2O3 and CBr4 in vacuum at 200°C; various yields for various educt ratio;;

in further solvent(s) other Radiation; Bi(NO3)3 dissolved in mannitol contained bromide, mixt. stirred, sonicated until dissolution, heated to 110 °C for 3 min (or 30 or 60 °C) kept at this temp. for 27 min (or 7, 17 min) in microwave reactor (irradiation power 500 W); mixt. cooled to room temp., centrifuged, washed (H2O, ethanol, 5 times),dried (dessicator, few d); detd. by XRD;

Br2/H2O heating BiI3 with Br2/H2O;;

in not given addition of Br(1-) to n acidic or very diluted Bi(3+) solutions;; precipitation; formation of a soluble compound on further addition of Br(1-);;