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Duftite-alpha

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About Duftite-alphaHide

Formula:
PbCu(AsO4)(OH)
Colour:
Green
Lustre:
Vitreous, Dull
Hardness:
3
Dimorph of:
A polymorph of Duftite apparently isostructural with Descloizite (for literature see Duftite). Modern studies needed.
Originally described from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia.
Guillemin (1956) distinguished two kinds of duftite: "duftite-α" = duftite (space group Pnam) and (Ca-bearing) "duftite-β" = duftite (space group P212121).


Classification of Duftite-alphaHide

'Grandfathered' (first described prior to 1959), Questionable
41.5.2.5

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq

Physical Properties of Duftite-alphaHide

Vitreous, Dull
Colour:
Green
Hardness:

Optical Data of Duftite-alphaHide

Type:
Biaxial (-)
RI values:
nα = 2.040 nβ = 2.080 nγ = 2.100
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r < v strong

Chemical Properties of Duftite-alphaHide

Formula:
PbCu(AsO4)(OH)

Synonyms of Duftite-alphaHide

Other Language Names for Duftite-alphaHide

German:α-Duftit
Spanish:α-Duftita

Relationship of Duftite-alpha to other SpeciesHide

Other Members of this group:
AdeliteCaMg(AsO4)(OH)Orth. 2 2 2 : P21 21 21
ArsendescloizitePbZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
AustiniteCaZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
ČechitePbFe2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m)
CobaltaustiniteCaCo(AsO4)(OH)Orth. 2 2 2 : P21 21 21
ConichalciteCaCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
DescloizitePbZn(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
DuftitePbCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
GabrielsonitePbFe3+(As3+O3)OOrth. mm2 : Pmc21
GottlobiteCaMg(VO4,AsO4)(OH)Orth. 2 2 2 : P21 21 21
HermannroseiteCaCu(PO4)(OH)Orth. 2 2 2 : P21 21 21
MottramitePbCu(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
NickelaustiniteCaNi(AsO4)(OH)Orth. 2 2 2 : P21 21 21
PyrobelonitePbMn2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
TangeiteCaCu(VO4)(OH)Orth. 2 2 2 : P21 21 21
VuagnatiteCaAl(SiO4)(OH)Orth.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Duftite1 photo of Duftite-alpha associated with Duftite on mindat.org.
Dioptase1 photo of Duftite-alpha associated with Dioptase on mindat.org.
Malachite1 photo of Duftite-alpha associated with Malachite on mindat.org.
Calcite1 photo of Duftite-alpha associated with Calcite on mindat.org.

Related Minerals - Dana Grouping (8th Ed.)Hide

41.5.2.1DescloizitePbZn(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
41.5.2.2MottramitePbCu(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
41.5.2.3PyrobelonitePbMn2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
41.5.2.4ČechitePbFe2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m)

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Duftite-alphaHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Guillemin, C. (1956) Contribution a la minéralogie des arséniates, phosphates et vanadates de cuivre. I. Arséniates de cuivre. Bulletin de la Société française de Minéralogie, 79, 7–95, esp. 70–80 (in French).

Internet Links for Duftite-alphaHide

Localities for Duftite-alphaHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany
 
  • Rhineland-Palatinate
    • Rhein-Lahn-Kreis
      • Bad Ems
        • Frücht
Der Aufschluss Vol.55, March/April 2004
Namibia
 
  • Oshikoto Region
    • Tsumeb
Hey p187; Mineralogical Record, 8 (3), 130 pp.
UK
 
  • England
    • Cumbria
      • Eden
        • Mungrisdale
Cooper, M.P. and Stanley, C.J. (1990) Minerals of the English Lake District: Caldbeck Fells. Natural History Museum Publications, London, 160 pp.
 
Mineral and/or Locality  
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