Mn-55 NMR in CsMnI3 was investigated at 1.3 K to study the spin struct
ure in a triangular lattice Heisenberg antiferromagnet. It was found t
hat the rotation of the triangular spin plane around the c-axis surviv
es below T-N2 With canting angle 56.6 degrees and induces the frequenc
y pulling in Mn-55 NMR. (C) 1998 Elsevier Science B.V. All rights rese
rved.