Tungstenite Schutte W J, de Boer J L, Jellinek F Journal of Solid State Chemistry 70 (1987) 207-209 Crystal structures of tungsten disulfide and diselenide Sample: 3R polytype _database_code_amcsd 0013602 3.158 3.158 18.49 90 90 120 R3m atom x y z W 0 0 .0000 S1 0 0 .2497 S2 0 0 .4190