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Markcooperite

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About MarkcooperiteHide

03153980014947177888030.jpg
Mark Cooper
Formula:
Pb2(UO2)(TeO6)
Colour:
Orange
Lustre:
Adamantine
Hardness:
3
Specific Gravity:
8.496 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honor of Mr. Mark Cooper, Canadian mineralogist, University of Manitoba.
The unique feature of the mineral, not observed in any other species, is U-Te diadochy substitution.


Classification of MarkcooperiteHide

Approved
Approval Year:
2009

Physical Properties of MarkcooperiteHide

Adamantine
Transparency:
Transparent
Colour:
Orange
Streak:
Light orange
Hardness:
Hardness Data:
Estimated
Tenacity:
Brittle
Cleavage:
Perfect
perfect on {100}
Fracture:
Irregular/Uneven
Density:
8.496 g/cm3 (Calculated)
Comment:
Calculation based on the empirical formula.

Optical Data of MarkcooperiteHide

Type:
Biaxial (+)
RI values:
nα = 2.110 nβ = 2.120 nγ = 2.290
2V:
Measured: 30° (5)
Max Birefringence:
δ = 0.180
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
None observed
Pleochroism:
Weak
Comments:
Shades of orange, absorption X>Y=Z
Comments:
Orientation: X = c, Y = b, Z = a

Chemical Properties of MarkcooperiteHide

Formula:
Pb2(UO2)(TeO6)
IMA Formula:
Pb2(UO2)TeO6
Emperical Formula (of original material):
Pb2.05U0.80Te6+1.18O7.99Cl0.01

Crystallography of MarkcooperiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 5.7217(16) Å, b = 7.7476(2) Å, c = 7.889(2) Å
β = 90.833(5)°
Ratio:
a:b:c = 0.739 : 1 : 1.018
Unit Cell V:
349.7 ų
Z:
2

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0017720MarkcooperiteKampf A R, Mills S J, Housley R M, Marty J, Thorne B (2010) Lead-tellurium oxysalts from Otto Mountain near Baker, California: IV. Markcooperite, Pb(UO2)Te6+O6, the first natural uranyl tellurate American Mineralogist 95 1554-15592010Otto Mountain, Baker, California0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.501 Å(29)
3.235 Å(100)
2.985 Å(37)
2.873 Å(40)
2.774 Å(30)
2.220 Å(23)
1.990 Å(21)
1.715 Å(22)

Type Occurrence of MarkcooperiteHide

General Appearance of Type Material:
Pseudotetragonal prisms to 0.2 mm with the forms {100} and {011}, and botryoidal intergrowths to 0.3 mm in diameter. No twinning was observed.
Place of Conservation of Type Material:
Natural History Museum of Los Angeles County, catalog numbers 62510, 62511, and 62512 (three co-type specimens).
Geological Setting of Type Material:
Fracture surfaces and small vugs in brecciated quartz veins.
Associated Minerals at Type Locality:

Synonyms of MarkcooperiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
12 photos of Markcooperite associated with HousleyitePb6CuTe6+4O18(OH)2
7 photos of Markcooperite associated with OttoitePb2TeO5
4 photos of Markcooperite associated with Eckhardite(Ca,Pb)Cu2+Te6+O5(H2O)
2 photos of Markcooperite associated with QuartzSiO2
1 photo of Markcooperite associated with TimroseitePb2Cu5(TeO6)2(OH)2
1 photo of Markcooperite associated with ChlorargyriteAgCl
1 photo of Markcooperite associated with CalciteCaCO3
1 photo of Markcooperite associated with KhinitePb2+Cu2+3[Te6+O6](OH)2

Fluorescence of MarkcooperiteHide

Not fluorescent.

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 MarkcooperiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Mills, S.J., Housley, R.M., Marty, J., and Thorne, B. (2010): Lead-tellurium oxysalts from Otto Mountain near Baker, California: IV. Markcooperite, Pb(UO2)Te6+O6, the first natural uranyl tellurate. American Mineralogist 95, 1554–1559.

Internet Links for MarkcooperiteHide

Localities for MarkcooperiteHide

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.
DR Congo
 
  • Lualaba
    • Kolwezi mining district
      • Kamoto
Analyzed by Joy Desor.
USA
 
  • California
    • San Bernardino Co.
      • Silver Lake Mining District
        • Soda Mountains
          • Baker
Kampf, A. R., Mills, S. J., & Housley, R. M. (2010). The crystal structure of munakataite, Pb2Cu2 (Se4+ O3)(SO4)(OH) 4, from Otto Mountain, San Bernardino County, California, USA. Mineralogical Magazine, 74(6), 991-998.
Kampf, A. R., Mills, S. J., Housley, R. M., Marty, J. & Thorne, B. (2010) Lead-tellurium oxysalts from Otto Mountain near Baker, California: IV. Markcooperite, Pb2(UO2)TeO6, the first natural uranyl tellurate. American Mineralogist, 95(10), 1554–1559.
Kampf, A. R., Mills, S. J., Housley, R. M., Marty, J. & Thorne, B. (2010) Lead-tellurium oxysalts from Otto Mountain near Baker, California: IV. Markcooperite, Pb2(UO2)TeO6, the first natural uranyl tellurate. American Mineralogist, 95(10), 1554–1559.
 
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