K. D. Bronsema, R. Jansen, G. Wiegers
May 1, 1984
Citations
0
Influential Citations
25
Citations
Journal
Materials Research Bulletin
Abstract
The crystal structures of the potassium vanadium sulphides K0.7V5S8 and K0.5V5S8 (=KV10S16) have been determined. K0.7V5S8 has a C-centered monoclinic unit cell of dimensions a=17.499(3) A, b=3.2986(6) A, c=8.489(1) A, s=103.98(1)°, spacegroup C2/m; isomorphous with TIV5S8; K0.5V5S8 has essentially the same structure, but due to ordering of the K atoms, the monoclinic b-axis is doubled, thus forming a superstructure. The cell parameters are: a=17.462(4) A, b=6.556(2) A, c=8.4595(9) A, s=103.86(1)°, spacegroup P2. The structures are characterized by a three-dimensional framework of VS6 octahedra with channels in which the K atoms are situated. Both compounds exhibit metallic behaviour.