Record details

    Duhamelite discredited
Statement of responsibility
    Werner Krause, Uwe Kolitsch, Heinz-Jürgen Bernhardt, Herta Effenberger
    Bernhardt, Heinz-Jürgen
    Effenberger, Herta
    Kolitsch, Uwe
    Krause, Werner
Source title - serial
    Neues Jahrbuch für Mineralogie. Monatshefte
    H. 2
    s. 75-96
    5 obr., 1 fot., 7 tab., 3 s. bibl.
    Zkr. název ser.: Neu. Jb. Mineral., Mh.
Subject group
    chemismus minerálů
    exemplář typový
    mřížkové parametry
    zpřesňování struktury
Geographical name
    Demokratická republika Kongo
    Jáchymov (Karlovy Vary)
Abstract (in english)
   Reinvestigation of duhamelite, originally described as Cu4Pb2Bi(VO4)4 (OH)3 _ 8H2O, has demonstrated that it is not a valid independent mineral species. Analyses of the type material and of additional samples by means of electron mi-croprobe, X-ray powder and single-crystal diffractometry including structure refinements, and transmission electron microscopy have shown that duhamelite belongs to the adelite-descloizite-group with the general formula AB(XO4)(OH). Duhamelite in the strict sense corresponds to a bismuth- and calcium-bearing mottramite; the empirical formula of the type material is (Pb0.49Bi0.36Ca0.12)sigma0.97Cu1.01[(VO4)0.85(AsO4)0.08(SiO4)0.07]sigma1.00[O0.27(OH)0.71]sigma0.98 (based on 5 oxygen atoms per formula unit), or simplified (Pb,Bi,Ca)Cu(VO4)(OH,O). The formal discreditation of duhamelite has been approved by the Commission on New Minerals and Mineral Names, I.M.A
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    11. 7. 2007
Import date
    8. 8. 2012