  Raman scattering studies of the frustrated spin chain system
LiCu$_{2}$O$_{2}$ are reported. Two transitions into a magnetically ordered
phase (taken place at temperatures $\sim$ 9 K and $\sim$ 24 K) have been
confirmed from the analysis of optical properties of the samples.
Interestingly, two different magnetic excitations, seen at 100 and 110
cm$^{-1}$ in the magnetically ordered phase superimpose each other
independently, indicating a coherent coexistence of long-range magnetic order
and dimerization. The observed phenomenon is attributed to magnetostructural
peculiarities of LiCu$_{2}$O$_{2}$ leading to the intrinsic presence of
nonmagnetic impurities on a nanometer scale. Furthermore, magnetic impurities
play a significant role in driving the transition from an incommensurate state
to a N\'{e}el ordered one at 9 K.
