• journal_title：The Canadian Mineralogist
• Contributor：Dan Topa ; Václav Petřiček ; Michal Dušek ; Emil Makovicky ; Tonči Balić-Žunić
• Publisher：Mineralogical Association of Canada
• Date：2008-
• Format：text/html
• Language：en
• Identifier：10.3749/canmin.46.2.525
• journal_abbrev：Can Mineral
• issn：0008-4476
• volume：46
• issue：2
• firstpage：525
• section：Articles

Crystal structures of intergrown lindströmite and krupkaite were determined in two distinct samples by a simultaneous crystal-structure refinement using a modified jana program package. The exsolution intergrowths have a bulk composition, determined by means of electron microprobe, equal to bd_60.1 and bd_64.1, respectively. The subscript indicates a percentage of the aikinite component in this bismuthinite derivative. The crystal structure of lindströmite contains two aikinite-like ribbons Cu₂Pb₂Bi₂S₆ and eight krupkaite-like ribbons (ideally CuPbBi₃S₆) in a unit cell. The latter are oversubstituted; the ideally empty tetrahedral sites associated with them refined to the occupancy values of 0.04–0.09 Cu and 0.14–0.18 Cu, respectively, for the two above bulk compositions. The refined phase-compositions are Cu_6.26Pb_6.26Bi_13.74S₃₀ (bd_62.6) associated with CuPbBi₃S₆ (bd₅₀) for the sample ‘bd₆₀’ and Cu_6.64Pb_6.64Bi_13.36S₃₀ (bd_66.4) associated with oversubstituted krupkaite, the composition of which could not been refined, for the sample ‘bd₆₄’. From stoichiometry calculations, the latter is ~bd_60. Both latter values may be somewhat overestimated as a result of cross-correlations between the two closely related structures during the refinement.