  We report on magnetization and specific heat measurements on
single-crystalline CuTe2O5. The experimental data are directly compared to
theoretical results for two different spin structures, namely an alternating
spin-chain and a two-dimensional (2D) coupled dimer model, obtained by Das et
al. [Phys. Rev. B 77, 224437 (2008)]. While the analysis of the specific heat
does not allow to distinguish between the two models, the magnetization data is
in good agreement with the 2D coupled dimer model.
