Na4.25Mo15S19: a novel ternary reduced molybdenum sulfide containing Mo6 and Mo9 clusters

Diala Salloum (1) , Patrick Gougeon (1) , Philippe Gall (1)

1 ISCR - Institut des Sciences Chimiques de Rennes

The structure of tetra-sodium penta-deca-molybdenum nona-deca-sulfide, Na4.25Mo15S19, is isotypic with Na3.9Mo15Se19 [Salloum et al. (2013 ). Acta Cryst. E69, i67-i68]. It is characterized by Mo6S (i) 8S (a) 6 and Mo9S (i) 11S (a) 6 (where i represents inner and a apical atoms) cluster units that are present in a 1:1 ratio. The cluster units are centered at Wyckoff positions 2b and 2c, and have point-group symmetry -3 and -6, respectively. The clusters are inter-connected through additional Mo-S bonds. The Na(+) cations occupy inter-unit voids formed by six or seven S atoms. One Mo, one S and one Na site [occupancy 0.751 (12)] are situated on mirror planes, and two other S atoms and one Na site (full occupancy) are situated on threefold rotation axes.

Domaines: Chimie inorganique

Diala Salloum, Patrick Gougeon, Philippe Gall. Na4.25Mo15S19: a novel ternary reduced molybdenum sulfide containing Mo6 and Mo9 clusters. Acta Crystallographica Section E : Structure Reports Online [2001-2014], 2014, 70 (Pt 6), pp.E70, i30. ⟨10.1107/S160053681401201X⟩. ⟨hal-01016047⟩