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Duhamelite

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Erongo Region, Namibia

Show Duhamelite Photos (8)
Formula:
(Pb,Bi,Ca)Cu[(OH,O)|VO
 
4
]
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[(OH,O)|VO
 
4
]
Essential elements:Bi, 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
AlVO
 
4
·3H
 
2
O
21.3.2Alvanite
(Zn,Ni)Al
 
4
[(OH)
 
12
|V
 
2
O
 
6
] · 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
 
2
V
 
6
O
 
37
·30H
 
2
O
21.3.6Vanalite
NaAl
 
8
V
 
10
O
 
38
·30H
 
2
O
21.3.7Wakefieldite-(Ce)
CeVO
 
4
21.3.7Wakefieldite-(Y)
YVO
 
4
21.3.8Chervetite
Pb
 
2
[V
 
2
O
 
7
]
21.3.9Mottramite
Pb(Cu,Zn)[OH|VO
 
4
]
21.3.10Descloizite
Pb(Zn,Cu)[OH|VO
 
4
]
21.3.11Clinobisvanite
BiVO
 
4
21.3.11Dreyerite
BiVO
 
4
21.3.11Pucherite
BiVO
 
4
21.3.12Schumacherite
Bi
 
3
[O|OH|(VO
 
4
)
 
2
]
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

    Hide Locality List
    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.
    (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
        • Western area
          • 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
          • Copper Valley
    		Gerhard Niedermayr: Mesopotamia 504 - die Typlokalität des Namibit
    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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