Original paper

The crystal structure of jankovićite, Tl5Sb9(As,Sb)4S22

Libowitzky, Eugen; Giester, Gerald; Tillmanns, Ekkehart

European Journal of Mineralogy Volume 7 Number 3 (1995), p. 479 - 488

25 references

published: May 19, 1995
manuscript accepted: Nov 22, 1994
manuscript received: May 2, 1994

DOI: 10.1127/ejm/7/3/0479

BibTeX file

ArtNo. ESP147050703002, Price: 29.00 €

Download preview PDF Buy as PDF

Abstract

Abstract The recently discovered mineral jankovićite with the formula Tl5Sb9(As,Sb)4S22 from the Allchar region, Macedonia, was investigated by single crystal X-ray diffraction methods. The structure was determined by direct methods from 3502 reflections, measured on a four-circle diffractometer, and refined to a final /lvalue of R/Rw = 0.062/0.038. The cell parameters are a0 = 7.393(4) Å, bo = 8.711(5) Å, c0 = 17.58(1) Å, α = 103.81(3)°, ß = 91.81(3)°, γ= 109.51(3)°; space group Pi, Z= 1. The structure consists of kinked chains of SbSn (n = 3, 2 + 2, 3 + 1, 3 + 2, 3 + 3) polyhedra //c which are connected by AsSn pyramids to form puckered layers // (100). These Sb-As-S layers are interconnected via Tl atoms in eight coordination. One Tl atom and one Sb atom share an approximately common site which is statistically occupied. The As sites are partially substituted by Sb. The structure shows close similarities with that of rebulite, Tl5Sb5As8S22.

Keywords

jankoviciteTl-sulfosaltsAllcharMacedoniacrystal structure.