Heat conduction in the one-dimensional AF spin chain compound CuSb$_2$O$_6$

We report thermal conductivity ($\kappa$) measurements on single crystals of the $S=1/2$ antiferromagnetic spin-chain compound CuSb$_2$O$_6$ over the temperature range $5{\rm K}\leq {\rm T}\leq 300 {\rm K}$. A much larger spin contribution to $\kappa$ is evident along the spin chains ([110] direction) than along [100] and [010]. The possible roles of spin-phonon scattering and twinning will be discussed along with $\kappa$ measurements in applied magnetic field.