0
no,all zones have the same volume
I believe they are special points (in reciprocal or "k" space) in the first Brillouin zone which have symmetry dependent upon the type of lattice (FCC, BCC, etc). One notable k point is Gamma which is the center of the first Brillouin zone.
Marcel Brillouin died in 1948.
Marcel Brillouin was born in 1854.
Léon Brillouin died on 1969-10-04.