  We report high-resolution x-ray diffraction, muon-spin-rotation spectroscopic
and specific heat measurements in the double spin-chains compound $\rm
LiCu_2O_2$. The x-ray diffraction results show that the crystal structure of
$\rm LiCu_2O_2$ ~is orthorhombic down to T=10K. Anisotropic line-broadening of
the diffraction peaks is observed, indicating disorder along the spin chains.
Muon spin relaxation and specific heat measurements show that $\rm LiCu_2O_2$
\~undergoes a phase transition to a magnetic ordered state at $\rm T_1\sim24K$.
The specific heat data exhibits a second $\rm \lambda$-like peak at $\rm
T_2\sim22.5 K$, which increases with increasing magnetic field similarly way to
that found in spin-ladder compounds.
