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Oboyerite

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Grand Central Mine, Contention-Grand Central Mine group, Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA
© Bruce Murphy 2007

Formula:
Pb
 
6
H
 
6
[(Te
4+
 
O
 
3
)
 
3
|(Te
6+
 
O
 
6
)
 
2
] · 2H
 
2
O
System:TriclinicColour:Milk white
Hardness:1½
Name:For prospector Oliver Boyer.
This page provides mineralogical data about Oboyerite.

Classification of Oboyerite

IMA status:Approved 1979
Strunz 8th edition ID:4/K.19-20
Nickel-Strunz 10th (pending) edition ID:4.JN.25

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
N : Tellurites with additional anions, with H2O
Dana 8th edition ID:34.8.3.1

34 : SELENITES, TELLURITES AND SULFITES
8 : Compound Selenites, Tellurites and Sulfites
Hey's CIM Ref.:28.4.5

28 : Selenites, Selenates, Tellurites, and Tellurates
4 : Tellurates
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Type Occurrence of Oboyerite

Type Locality:Grand Central Mine, Contention-Grand Central Mine group, Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA
Place of Conservation of Type Material:Smithsonian Museum, Washington DC 162210
Year of Discovery:1979
Geological Setting of type material:Mine dump.

Physical Properties of Oboyerite

Diaphaneity (Transparency):Translucent
Colour:Milk white
Hardness (Mohs):1½
Density (measured):6.4(6) g/cm3
Density (calculated):6.66 g/cm3

Crystallography of Oboyerite

Crystal System:Triclinic
Cell Parameters:a = 12.249(8) Å, b = 15.113(6) Å, c = 6.868(3) Å
α = 116.45(4)°, β = 98.58(4)°, γ = 85.82(4)°
Ratio:a:b:c = 0.81 : 1 : 0.454
Unit Cell Volume:V 1,125.54 ų (Calculated from Unit Cell)
Z:2
Morphology:Tiny spherules

Optical Data of Oboyerite

Type:Biaxial
RI values: nα = 2.240 nγ = 2.260
Maximum Birefringence:δ = 0.020

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively strong
Optical Extinction:Maximum at 37 degrees to elongation.

Chemical Properties of Oboyerite

Formula:
Pb
 
6
H
 
6
[(Te
4+
 
O
 
3
)
 
3
|(Te
6+
 
O
 
6
)
 
2
] · 2H
 
2
O
Essential elements:H, O, Pb, Te
All elements listed in formula:H, O, Pb, Te

Relationship of Oboyerite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JN.05Sonoraite
Fe
3+
 
[OH|TeO
 
3
] · H
 
2
O
4.JN.10Poughite
Fe
3+
2
[SO
 
4
|(TeO
 
3
)
 
2
] · 3H
 
2
O
4.JN.15Cesbronite
Cu
 
5
[(OH)
 
3
|TeO
 
3
]
 
2
 · 2H
 
2
O
4.JN.20Eztlite
Pb
 
2
Fe
3+
6
[(OH)
 
10
|(Te
4+
 
O
 
3
)
 
3
|Te
6+
 
O
 
6
] · 8H
 
2
O
4.JN.30Juabite
CaCu
 
10
[OH|(AsO
 
4
)
 
2
|(TeO
 
3
)
 
2
]
 
2
 · 4H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
28.4.1Xocomecatlite
Cu
 
3
[(OH)
 
4
|TeO
 
4
]
28.4.2Carlfriesite
CaTe
 
3
O
 
8
28.4.3Yafsoanite
Ca
 
3
Zn
 
3
[TeO
 
6
]
 
2
28.4.4Tlalocite
Cu
 
10
Zn
 
6
(TeO
 
3
)(TeO
 
4
)
 
2
Cl(OH)
 
25
·27H
 
2
O
28.4.6Schieffelinite
Pb
 
8
(TeO
 
4
)
 
5
(SO
 
4
)
 
3
·8H
 
2
O
28.4.7Girdite
Pb
 
3
H
 
2
[Te
4+
 
O
 
3
|Te
6+
 
O
 
6
]
28.4.8Khinite
Pb
2+
 
Cu
2+
3
(TeO
 
6
)(OH)
 
2
28.4.9Parakhinite
Pb
2+
 
Cu
2+
3
TeO
 
6
(OH)
 
2
28.4.10Dugganite
Pb
 
3
Zn
 
3
(Te
6+
 
O
 
6
)(AsO
 
4
)
 
2
28.4.11Kuksite
Pb
 
3
Zn
 
3
TeO
 
6
(PO
 
4
)
 
2
28.4.12Cheremnykhite
Pb
 
3
Zn
 
3
TeO
 
6
(VO
 
4
)
 
2
28.4.13Tlapallite
H
 
6
(Ca,Pb)
 
2
(Cu,Zn)
 
3
SO
 
4
(TeO
 
3
)
 
4
TeO
 
6
28.4.14Montanite
Bi
 
2
[TeO
 
6
] · 2H
 
2
O
28.4.15Kuranakhite
PbMn
4+
 
Te
6+
 
O
 
6
28.4.16Cuzticite
Fe
3+
2
[TeO
 
6
] · 3H
 
2
O
28.4.17Yecoraite
Fe
3+
3
(BiO)
 
5
(Te
4+
 
O
 
3
)(Te
6+
 
O
 
6
)
 
2
 · 9H
 
2
O

Other Names for Oboyerite

Synonyms:
IMA1979-009
Other Languages:
German:Oboyerit
Spanish:Oboyerita

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 Oboyerite

Reference List:Williams, S.A. (1979): Girdite, oboyerite, fairbankite, and winstanleyite, four new tellurium minerals from Tombstone, AZ. Mineralogical Magazine, 43, 453-457.

American Mineralogist (1980): 65: 809.

American Mineralogist (1981): 66: 220.

Geological Survey of Canada Paper 80-113: 295.

Internet Links for Oboyerite

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  • Raman and XRD data at RRUFF project
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    Localities for Oboyerite

    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.
    USA
     
    • Arizona
      • Cochise Co.
        • Tombstone Hills
          • Tombstone District
            • Contention-Grand Central Mine group
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 218, 315; Williams, S.A. (1979), Girdite, oboyerite, fairbankite, and winstanleyite, four new tellurium minerals from Tombstone, AZ, Min.Mag.: 43: 453-457.
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 307.
    Mineral and/or Locality
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