The crystal structure of the phase alpha -SnCu2FeS4, has been examined by E
DX and electron and X-ray difraction techniques. This compound crystallizes
in the tetragonal space group P4 (No. 81) with a=c= 541.4 (4) pm, Z=1, and
it is a derivative structure of the basic sphalerite structure. The refine
ment of the structure converged to the final agreement index R(F)=0.060.