The relationship between the local structures and the electronic stares of
layered crystalline GeSe2 are studied by resonant Raman scattering. We obse
rve 34 Raman-active modes of symmetry A(g), and find a selective resonant e
nhancement of the modes. Almost all the modes are enhanced around 2.7 eV ex
cept the two modes. This selective enhancement is attributed to the resonan
t effect with the localized exciton. We find the essential difference in th
e atomic motions between the resonant and nonresonant modes. Such behaviors
are explained by a structural model of the localized exciton.