Cu4Sn7S16 Chen X, Wada H, Sato A, Mieno M Journal of Solid State Chemistry 139 (1998) 144-151 Synthesis, electrical conductivity, and crystal structure of Cu4Sn7S16 and structure refinement of Cu2SnS3 _database_code_amcsd 0013951 7.372 7.372 36.0100 90 90 120 R-3m atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Cu1 0 0 .1884 .5 .017 .017 .014 .009 0 0 Cu2 0 0 .2945 .013 .013 .090 .006 0 0 Cu3 0 0 0 .074 .074 .014 .037 0 0 Sn1 .5017 .4983 .2513 .011 .011 .013 .006 -.001 .001 Sn2 0 0 .5 .013 .013 .008 .007 0 0 S1 .4937 .5063 .1244 .010 .010 .009 .006 .000 .000 S2 .5074 .4926 .3760 .010 .010 .012 .005 -.001 .001 S3 0 0 .1239 .011 .011 .009 .006 0 0 S4 0 0 .3756 .010 .010 .010 .005 0 0