[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an chemical compound of caesium and bromine. It is used in optics as a beamsplitter component in wide-band spectrophotometers. Bromine is a halogen element with the symbol Br and atomic number 35. Diatomic bromine does not occur naturally, but bromine salts can be found in crustal rock. (L625, L645)"}, {"from": "gpt", "value": "[Br-1].[Cs+1]"}]