Crookesite Eriksson L, Werner P E, Berger R, Meerschaut A Journal of Solid State Chemistry 90 (1991) 61-68 Structure refinement of TlCu7Se4 from X-ray powder profile data Locality: Skrikerum mine, Sweden Sample: Single crystal _database_code_amcsd 0013693 10.4445 10.4445 3.9378 90 90 90 I4/m atom x y z occ Biso Tl 0 0 0 3.9 Cu1 .0208 .3680 0 3.4 Cu2 .324 .220 0 .63 3.6 Se .2436 .4309 0 3.0