**F. Biscarini, C. Chiccoli, P. Pasini, F. Semeria, C. Zannoni**,
Phase diagram and orientational order in a biaxial lattice model. A Monte
Carlo study, Phys. Rev. Lett., **75**, 1803-1806 (1995)

*We have determined the phase diagram for a lattice system of biaxial
particles interacting with a second rank anisotropic potential using Monte
Carlo (MC) simulations for a number of values of the molecular biaxiality.
We find increasing differences from Mean Field Theory as the biaxiality
increases. We have also calculated for the first time the full set of second
rank biaxial and uniaxial order parameters and their temperature dependence
and on this basis we comment on the difficulties of measuring phase biaxiality
by NMR. *