Chemical and structural characterizations of the LaAlO(3)(110) surface was investigated by XPS, XPD, LEED and RHEED. The atomic structure of this ternary alloy, can be viewed as a superposition of LaO and AlO(2) planes in the [001] direction. For clean substrates, a c(4x2) surface reconstruction was pointed out by RHEED and LEED. Polar X-ray photoelectron diffraction investigations made in the [-110] azimuthal direction, for La(3d), O(1s) and Al(2s)core levels reveal well structured diagrams reflecting the atomic distribution of the two kinds of parallel planes in the [-110] direction and perpendicular to the (110) surface. The main crystallographic directions give strong forward-scattering peaks at 0 degrees, 35 degrees and 54.7 degrees corresponding to the [110], [111] and [112] directions respectively. (C) 2008 Elsevier B.V. All rights reserved.