▁of ▁the ▁l ighter ▁members ▁of ▁group ▁ 1 5 , ▁ph osph orus ▁trif lu or ide , ▁P F 3 , ▁ar sen ic ▁trif lu or ide , ▁As F 3 ▁and ▁ant im ony ▁trif lu or ide , ▁S b F 3 , ▁where ▁M X 3 ▁mole cular ▁units ▁are ▁present ▁in ▁the ▁solid . ▁ ▁Re actions ▁Bi F 3 ▁is ▁una ffect ed ▁by ▁water ▁and ▁is ▁almost ▁ins ol ub le . ▁It ▁does ▁not ▁form ▁complex es ▁readily ▁but ▁the ▁following , ▁ ▁Bi F 3 . 3 H F ▁and ▁Bi F 4 − ▁in ▁N H 4 Bi F 4 , ▁are ▁known . ▁The ▁addition ▁comp ound ▁H 3 Bi F 6 ▁is ▁hydro ly sed ▁by ▁water ▁forming ▁Bi OF . ▁ ▁References ▁ ▁Category : B ism uth ▁comp ounds ▁Category : F lu or ides ▁Category : Met al ▁hal ides <0x0A> </s> ▁K appa ▁Aqu il ae , ▁Latin ized ▁from ▁ κ ▁Aqu il ae , ▁is ▁the ▁Bayer ▁design ation ▁for ▁a ▁star ▁in ▁the ▁equ atorial ▁const ell ation ▁of ▁Aqu ila . ▁It ▁is ▁a ▁faint ▁star ▁at ▁apparent ▁visual ▁magnitude ▁+ 4 . 9 5 7 , ▁but ▁bright ▁enough ▁to ▁be ▁seen ▁with ▁the ▁n aked ▁eye ▁in ▁dark ▁sub urban ▁sk ies . ▁The ▁annual ▁par alla x ▁is ▁only ▁ 1 . 9 4   mas , ▁which ▁equ ates ▁to ▁a ▁distance ▁of ▁approximately ▁ ▁from ▁Earth