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Radiofrequency discharges in neat BCI, exhibit 3 broad molecular emissions with intensity maxima at about 305,350, and 480 nm. The 350 nm system consists of a progression of bands with an average separation of about 130 cm-l. All three emissions have an identical excitation kinetics in pulse discharges and are, therefore, believed to originate from the same emitter. Arguments are given that the emitter might be electronically excited BCI,.The dominant process of BCI(A) formation in neat BCI, at low r.f. power is shown to be direct electron impact excitation of BCI(X). A transient excess population of BCI(AlI7) in BCI,/Ar discharges is explained as due to an energy transfer from argon metastables.