 | Sejkora, J., Škovíra, J., Čejka, J., Plášil, J. (2009) Cu-rich members of the beudantite-segnitite series from the Krupka ore district, the Krušné hory Mountains, Czech Republic. Journal of GEOsciences, 54 (4) 355-371 | Journal (article/letter/editorial) | | 355–371 DOI: 10.3190/jgeosci.055 Original paper Cu-rich members of the beudantite–segnitite series from...analyses revealed elevated Cu contents up to 0.90 apfu. Comparably high Cu contents were known until now...now only in the plumbojarosite–beaverite series. The Cu2+ ion enters the B3+ position in the structure...relatively homogeneous beudantite (0.35 – 0.60 apfu Cu) with the following average empirical formula: Pb1...infrared vibrational data is also presented. The Cu-rich members of the beudantite–segnitite series are |  | | Journal (article/letter/editorial) | | example, beaverite and osarizawaite, which are commonly formulated as Pb(Cu,Fe)3(SO+)z(OH)eand Pb(Cu,Al)dSOa)z(OH)0...formula Fe > Cu and Al > Cu, but the amount of substitutional Cu also is variable. Beaverite is therefore...therefore compositionally equivalent to Cu-bearing plumbojarosite. The CNMMN system also permits the introduction...d'exemple, la beaverite et 1'osarizawaite, auxquelles on attribue couramment les formules Pb(Cu,Fe)3(SOa)2(OH)6...et Pb(Cu,Al)3(SOa)2(OH)6,respectivement,ont une teneur en Fe et en Al supdrieured celle du Cu, mais cette |
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