STRUCTURAL, OPTICAL, AND ELECTRONIC PROPERTIES OF Li//3MS//3 COMPOUNDS (M**I**I**I equals Ti,Zr,Hf).

Article abstract of DOI:10.1016/0022-4596(88)90029-1

The Li//3MS//3 powder samples (M**I**I**I equals Ti,Zr,Hf), chemically prepared under mild conditions, have been studied by X-ray diffraction, infrared and Raman vibrational spectroscopies, UV-visible absorption, and electron paramagnetic resonance (EPR) technics. From X-ray data we confirm the topochemical mechanism of three lithium insertions into the 2D-MS//3 host lattices already proposed by R. R. Chianelli and M. B. Dines. From infrared and Raman results new structural information is obtained: on the one hand, the cleavage of (S//2)**2** minus pairs induces a new arrangement of the basic structure and on the other hand, Li-S interactions are by far predominant within strongly distorted two LiS//4 and one LiS// 6 groups; moreover M-S interactions are markedly weakened.