The crystal structures of LiCrS 2 and LiVS 2 are described. The anion-cation arrangement is like that in NiAs with ordering of Li and Cr (V) in alternating layers. The magnetic structure of LiCrS 2 which shows a spin ordering at 4.2°K was determined by means of neutron powder diffraction. The spin structure consists of a triangular arrangement within the hexagonal planes with antiparallel coupling between adjacent planes, i.e., an ordering of the third kind. In LiVS 2 no ordering was observed at 4.2°K.