FIBONACCI CHAIN - A QUASIPERIODIC APPROACH OF ONE DIMENSIONAL APERIODIC STRUCTURES. Maria Farkas-Jahnke, Research Institute for Technical Physics of HAS, H-1325 Budapest P.O.Box 76, Hungary

In aperiodic lattices built up of translationnaly equivalent layers - for example lattices of closed packed structures containing many stacking faults - only short range order can be determined exactly. In ZnS lattices the rate of occurences of stackings up to five layers can be determined using the data of X-ray patterns of the singl crystals in question. The longer range order in these faulted crystals can be approached by Fibonacci-chains, whose elements are composed as suitable arrangements of these five layer structure elements. In this way, relatively good quasiperiodic description to a long sequence of the faulted lattice can be given which can be used for interpretation of the dependence of certain physical properties from different lattice fault configurations.