AM_Crookesite_2
Formula: Tl Cu6.52 Se4
Name: Crookesite
Unit cell: 10.4445 10.4445 3.9378 90.0 90.0 90.0 , V=429.57
Space group: I14/M1 (1)

Eriksson L , Werner P E , Berger R , Meerschaut A , Journal of Solid State Chemistry , 90 (1991) p.61-68, Structure refinement of TlCu7Se4 from X-ray powder profile data, Locality: Skrikerum mine, Sweden, Sample: Single crystal