Long-range antiferromagnetic order in the S=1 chain compound LiVGe2O6
  The phase transition in the compound LiVGe2O6 has been proposed as a unique example of a spin-Peierls transition in an S=1 antiferromagnetic chain. We report neutron and x-ray diffraction measurements of LiVGe2O6 above and below the phase transition at T=24 K. No evidence is seen for any structural distortion associated with the transition. The neutron results indicate that the low temperature state is antiferromagnetic, driven by ferromagnetic interchain couplings. 
M.D. Lumsden, G.E. Granroth, D. Mandrus, S.E. Nagler, J.R. Thompson,   J.P. Castellan, and B.D. Gaulin