  Charge topology of fragmentation of 1.2 A GeV $^7$Be nuclei in nuclear track
emulsion is presented.The dissociation channels $^4$He + $^3$He, 2$^3$He+ n,
$^4$He + 2$^1$H are considered in detail. It is established that the events
$^6$Be + n amount about to 27 % in the channel $^4$He + 2$^1$H.
