Crystal structure of β-Ag8SnSe6

The crystal structure of the low-temperature modification (beta) of Ag8SnSe6 was investigated using X-ray powder diffraction. The compound crystallizes in the orthorhombic unit cell (space group Pmn2(1), a = 0.79168(6), b = 0.78219(6), c = 1.10453(8) nm) and is isostructural with beta'-Ag8GeSe6. Atomic parameters were refined in the isotropic approximation (R-t = 0.0679). (C) 2002 Elsevier Science B.V. All rights reserved.