  Two magnetic ordering transitions are found in InMnO3, the paramagnetic to
antiferromagnetic transition near ~118 K and a lower possible spin rotation
transition near ~42 K. Multiple length scale structural measurements reveal
enhanced local distortion found to be connected with tilting of the MnO5
polyhedra as temperature is reduced. Strong coupling is observed between the
lattice and the spin manifested as changes in the structure near both of the
magnetic ordering temperatures (at ~42 K and ~ 118 K). External parameters such
as pressure are expected to modify the coupling.
