Crystal structure, XANES and charge distribution investigation of krennerite and sylvanite: analysis of Au-Te and Te-Te bonds in AuAgTe group minerals.

The structure refinement and XANES study of two gold-silver-tellurides [AuAgTe, krennerite (x = 0.11-0.13) and sylvanite (x = 0.

Crystal structure and XANES investigation of petzite, AgAuTe.

Petzite, AgAuTe, crystallizes in the space group I432, which is a Sohncke type of space group where chiral crystal structures can occur. The structure refinement of petzite reported long ago [Frueh (1959). Am.