Original paper

Crystal chemistry of sartorite homologues and related sulfosalts

Berlepsch, Peter; Makovicky, Emil; Balić-Žunić, Tonči

Neues Jahrbuch für Mineralogie - Abhandlungen Band 176 Heft 1 (2001), p. 45 - 66

19 references

published: Feb 26, 2001

BibTeX file

ArtNo. ESP154017601003, Price: 29.00 €

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Ten selected sartorite homologues (Pb-As sulfosalts) and related compounds (mainly Tl-Sb-As sulfosalts) were investigated on modular and polyhedral level. For the cations with active lone-electron pairs crystal chemical trends could be established and correlated to the polyhedral settings by means of the polyhedral parameters; polyhedral volume, volume of circumscribed sphere, eccentricity, and volume distortion. For the As, Sb, and Pb coordinations, pairs of opposing bonds plotted into an xy-diagram form element specific hyperbolae. Besides the hyperbolic trend, a linear "join" perpendicular to the median line of two hyperbola arms was found for As and Sb. This situation is regarded as the result of two superimposed but unresolved positions in the same coordination polyhedron, with partly opposing long and short bonds. The crankshaft chains (unbroken chains of short As-S and Sb-S bonds) in the investigated sartorite homologues and the related compounds are oriented at right angles to each other in two adjacent planes within one tightly bonded double layer. The exceptions are synthetic BaSb2Se4


Sartorite homologuessulfosaltcrystal chemistrycoordination polyhedrabond-pairscrankshaft chains.