ON THE MAGNETIC-STRUCTURE OF BI2CUO4

We present here the results of Rietveld refinements of our neutron investigation on the magnetic structure of Bi2CuO4. On each copper site we measured a magnetic moment of m = 0.45 +/- 0.02 mu-B at T = 19K, incompatible with the determination of m = 0.93 +/- 0.06 mu-B at T = 1.5 K, obtained by Garcia-Munoz and co-workers. Otherwise, we do in general agree with the conclusions of their work and that of Troc and co-workers, and confirm that the magnetic arrangement below T(N) = 47.5 +/- 1 K can be viewed as a simple two-sublattice antiferromagnetic structure with rods of parallel moments along the c-axis.