K3Na(SeO4)(2) single crystal cleaved surfaces were imaged by means of
an atomic force microscope in air. The images revealed atomically flat
terraces 500 nm wide, with steps, this height being the multiple of t
he K3Na(SeO4)(2) c/2 lattice constant. For the first time, atomic reso
lution was observed on the KNSe crystal surface in air. Correlation be
tween the images obtained and crystal structure is discussed. (C) 1997
Elsevier Science Ltd.