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Duhamelite

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Erongo Region, Namibia

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Formula:
(Pb,Bi,Ca)Cu(VO
 
4
)(OH,O)
Lustre:Hardness:3
Name:For J.E. Duhamel.
A variety of Mottramite

Ca- and Bi-bearing variety of mottramite, typically with acicular habit.
Discredited as a mineral species.

Originally reported from Lousy Gulch, Payson area, Payson District (Green Valley District), Gila Co., Arizona, USA.

Classification of Duhamelite

IMA status:Discredited 2002
Hey's CIM Ref.:21.3.15

21 : Vanadates (and vanadates with arsenate or phosphate)
3 : Vanadates of Al, rare earths, Pb, V or Bi
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Physical Properties of Duhamelite

Hardness (Mohs):3

Optical Data of Duhamelite

Type:Biaxial
RI values: nα = 2.080 nβ = 2.110
Maximum Birefringence:δ = 2.080

Chart 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 Duhamelite

Formula:
(Pb,Bi,Ca)Cu(VO
 
4
)(OH,O)
Essential elements:Cu, H, O, Pb, V
All elements listed in formula:Bi, Ca, Cu, H, O, Pb, V
Empirical Formula:
(Pb
 
0.49
Bi
 
0.36
Ca
 
0.12
)
 
Σ0.97
Cu
 
1.01
 [(VO
 
4
)
 
0.85
(AsO
 
4
)
 
0.08
(SiO
 
4
)
 
0.07
]
 
Σ1.00
[O
 
0.27
(OH)
 
0.71
]
 
Σ0.98

Relationship of Duhamelite to other Species

Related Minerals - Hey's Index Grouping:

- +
21.3.1Steigerite
Al(VO
 
4
) · 3H
 
2
O
21.3.2Alvanite
(Zn,Ni)Al
 
4
(V
5+
 
O
 
3
)
 
2
(OH)
 
12
 · 2H
 
2
O
21.3.3Metaschoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 6H
 
2
O
21.3.4Schoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 8H
 
2
O
21.3.5Satpaevite
Al
 
12
V
4+
2
V
5+
6
O
 
37
 · 30H
 
2
O
21.3.6Vanalite
NaAl
 
8
V
 
10
O
 
38
 · 30H
 
2
O
21.3.7Wakefieldite-(Ce)
Ce(VO
 
4
)
21.3.7Wakefieldite-(Y)
Y(VO
 
4
)
21.3.8Chervetite
Pb
 
2
(V
 
2
O
 
7
)
21.3.9Mottramite
PbCu(VO
 
4
)(OH)
21.3.10Descloizite
Pb(Zn,Cu)(VO
 
4
)(OH)
21.3.11Clinobisvanite
Bi(VO
 
4
)
21.3.11Dreyerite
Bi(VO
 
4
)
21.3.11Pucherite
Bi(VO
 
4
)
21.3.12Schumacherite
Bi
 
3
(VO
 
4
)
 
2
O(OH)
21.3.13Namibite
Cu(BiO)
 
2
(VO
 
4
)(OH)
21.3.14Pottsite
HPbBi(VO
 
4
)
 
2
 · 2H
 
2
O

Other Names for Duhamelite

Other Languages:
German:Duhamelit
Spanish:Duhamelita

Other Information

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

References for Duhamelite

Reference List:

- +
Williams, S. A. (1981): Duhamelite, Cu4Pb2Bi(VO4)4(OH)3.8H2O, a new Arizona mineral. Mineralogical Magazine 44, 151-152.

Krause, W., U. Kolitsch, H.-J. Bernhardt and H. Effenberger (2003): Duhamelite discredited. Neues Jahrbuch Mineral. Monatsh. 2003, 75-96.

Internet Links for Duhamelite

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    • Localities for Duhamelite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • South Australia
      • Eyre Peninsula
        • Middleback Range
          • Iron Knob
    		Australian Jour.Min. v.6, no. 1
    Democratic Republic of Congo (Zaïre)
     
    • Katanga (Shaba)
      • Katanga Copper Crescent
        • Kolwezi
    		[MinRec 22:13-20,28]
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Andernach
          • Eich
            • Nickenicher Sattel (Eicher Sattel)
    		Blass, G. (1992): Spektakuläre Neufunde vom "Eicher Sattel" in der östlichen Vulkaneifel, Mineralien-Welt 5/1992
    Italy
     
    • Sardinia
      • Sassari Province
        • Ozieri
    		Olmi F.,Sabelli C.,Santucci A.,Brizzi G.- I silicati e i vanadati di Ozieri (SS)-Rivista Mineralogica Italiana 2/1995,pp145-160
    Mexico
     
    • Sonora
      • Mun. de Navojoa
    Namibia
     
    • Kunene Region
      • Damaraland District
        • Khorixas
          • Mesopotamia Copper Valley
    		Niedermayr, G.(2001): Mesopotamia 504 - die Typlokalität des Namibit. In: S. Jahn, O. Medenbach, G. Niedermayr, G. Schneider: Namibia - Zauberwelt edler Steine und Kristalle (1 Edition, in German), 97-99
    Switzerland
     
    • Wallis (Valais)
      • Anniviers Valley
        • Saint-Luc
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 143.
    USA
     
    • Arizona
      • Cochise Co.
        • Bowie area
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 209, 267.
        • Dos Cabezas Mts
          • Dos Cabezas (Two Heads) District
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 139, 209.
            • Comstock Mine area
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 176.
      • Gila Co.
        • Payson District (Green Valley District)
          • Oxbow Estates area
    		No reference listed
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 209.
      • Graham Co.
        • Bowie [Cochise Co.] area
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 139.
    • Nevada
      • Clark Co.
        • Goodsprings District
    		Self collected by Brent Thorne. SEM EDAX verified by Robert Housley
      • Lander Co.
        • Spencer Hot Springs District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 19th Jun 2011 18:04:34
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