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Paddlewheelite

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About PaddlewheeliteHide

Formula:
MgCa5Cu2(UO2)4(CO3)12(H2O)33
Colour:
blue green
Lustre:
Sub-Adamantine
Hardness:
2
Specific Gravity:
2.497 (Calculated)
Crystal System:
Monoclinic
Name:
Named after its distinctive structure, which consists of paddle-wheel clusters of uranyl tricarbonate units bound by square pyramidal copper “axles” and a cubic calcium cation “gearbox.”
Chemically and, most probably, also structurally related to voglite. Paddlewheelite structure is based upon the well-known structural motif, uranyl-tricarbonate cluster (UO2)(CO3)3, involved in a larger basic structural unit called a paddlewheel structure. The characteristic structural building unit, the modification of which is occurring also in the minerals albrechtschraufite, andersonite, braunerite and línekite. Paddlewheelite is the second-most structurally complex uranyl carbonate mineral known after ewingite.


Classification of PaddlewheeliteHide

Approved
Approval Year:
2018

Physical Properties of PaddlewheeliteHide

Sub-Adamantine
Transparency:
Transparent
Colour:
blue green
Comment:
shading close to Pantone 334c
Streak:
pale blue green
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
{100}
Density:
2.497 g/cm3 (Calculated)

Chemical Properties of PaddlewheeliteHide

Formula:
MgCa5Cu2(UO2)4(CO3)12(H2O)33

Crystallography of PaddlewheeliteHide

Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Pb
Setting:
Pc
Cell Parameters:
a = 22.052(4) Å, b = 17.118(3) Å, c = 19.354(3) Å
β = 90.474(2)°
Ratio:
a:b:c = 1.288 : 1 : 1.131
Unit Cell V:
7,305.62 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
11.12(100)
7.33(46)
6.42(30)
5.54(37)
4.823(33)
4.642(38)
4.215(34)
3.717(33)

Occurrences of PaddlewheeliteHide

Paragenetic Mode(s):
•  Oxidation

Type Occurrence of PaddlewheeliteHide

General Appearance of Type Material:
tabular crystals flattened on {100}
Place of Conservation of Type Material:
Mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 66696.
Geological Setting of Type Material:
Oxidation of uraninite. Crystals of paddlewheelite were collected underground from a bifurcation of the Prokop vein on the 5th level of the Svornost mine, Jáchymov District, Bohemia, Czech Republic.
Associated Minerals at Type Locality:

Synonyms of PaddlewheeliteHide

Fluorescence of PaddlewheeliteHide

Other InformationHide

Notes:
immediately soluble with effervescence in dilute HCl at room temperature
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 PaddlewheeliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Olds, T.A., Plášil, J., Kampf, A.R., Bo, F. and Burns, P.C. (2018) Paddlewheelite, IMA 2017-098. CNMNC Newsletter No. 41, February 2018, page 184; European Journal of Mineralogy: 30: 183-186.
Olds, T., Plášil, J., Kampf, A., Dal Bo, F., & Burns, P. (2018). Paddlewheelite, a New Uranyl Carbonate from the Jáchymov District, Bohemia, Czech Republic. Minerals, 8(11), 511.

Internet Links for PaddlewheeliteHide

Localities for PaddlewheeliteHide

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.
Czech Republic (TL)
 
  • Karlovy Vary Region
    • Krušné Hory Mts (Erzgebirge)
      • Jáchymov District (St Joachimsthal)
        • Jáchymov (St Joachimsthal)
          • Svornost Mine (Einigkeit Mine)
Olds, T.A., Plášil, J., Kampf, A.R., Bo, F. and Burns, P.C. (2018) Paddlewheelite, IMA 2017-098. CNMNC Newsletter No. 41, February 2018, page 184; European Journal of Mineralogy: 30: 183-186.
Mineral and/or Locality  
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