We present LEED and thermal desorption data for hydrogen adsorption on Rh(3
11). An anisotropic lattice gas model with first, second and third nearest
neighbor and trio interactions is set up and solved using transfer matrix t
echniques to explain equilibrium structural data and temperature-programmed
desorption consistently. A comparison with results for hydrogen on Rh(110)
and Rh(lll) is made. (C) 1999 Elsevier Science B.V. All rights reserved.