Uranospinite (original) (raw)
A valid IMA mineral species - grandfathered
About UranospiniteHide
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Formula:
Ca(UO2)2(AsO4)2 · 10H2O
Colour:
Yellow, lemon-yellow to greenish yellow
Lustre:
Waxy, Pearly, Earthy
Crystal System:
Tetragonal
Name:
Named in 1873 by Albin Weisbach for the URANium content plus the Greek σπίυος "spinos", for "siskin," referring to the green color.
Often as fine-grained waxy to powdery light yellow coatings. Autunite Group.
May dehydrate to metauranospinite. Possible hydronium analogue is UM1997-19-AsO:HU.
A secondary mineral occurring in the oxidized zone of arsenic-bearing and uranium-bearing hydrothermal deposits.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:4113:9
d6a0a69f-d3b1-4fa5-989b-d01f0bdae45a
IMA Classification of UranospiniteHide
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Approved, 'Grandfathered' (first described prior to 1959)
Classification of UranospiniteHide
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8.EB.05
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
40.2a.2.1
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
20.7.10
20 : Arsenates (also arsenates with phosphate, but without other anions)
7 : Arsenates of U
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Usp | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of UranospiniteHide
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Comment:
Luster pearly on {001}.
Colour:
Yellow, lemon-yellow to greenish yellow
Cleavage:
Perfect
On {001}, perfect; on {100}, distinct.
Density:
3.45 g/cm3 (Measured) 3.30 g/cm3 (Calculated)
Optical Data of UranospiniteHide
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RI values:
_n_α = 1.550 _n_β = 1.567 - 1.582 _n_γ = 1.572 - 1.587 _n_ω = 1.572 - 1.587 _n_ε = 1.550 - 1.560
δ = 0.022 - 0.027
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
r > v moderate
Optical Extinction:
Parallel
Comments:
O = Y = Z = Pale yellow E = X = Nearly colourless
Comments:
Commonly anomalously biaxial -, may be zoned.
Chemistry of UranospiniteHide
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Mindat Formula:
Ca(UO2)2(AsO4)2 · 10H2O
Crystallography of UranospiniteHide
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Crystal System:
Tetragonal
Class (H-M):
4/m m m _(_4/_m_2/_m_2/m ) - Ditetragonal Dipyramidal
Cell Parameters:
a = 7.16 Å, c = 20.4 Å
Unit Cell V:
1,045.82 ų (Calculated from Unit Cell)
Morphology:
Crystals rare, tabular, flattened on {001}. Forms aggregates and crusts.
Comment:
Point Group/Class & Space Groups based on synthetic material and are probable.
Epitaxial Relationships of UranospiniteHide
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Epitaxy Comments:
Uranospinite may contain a core of zeunerite with the same crystallographic orientation.
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.16 Å | (100) |
| 5.13 Å | (70) |
| 4.90 Å | (60) |
| 3.56 Å | (90) |
| 3.39 Å | (80) |
| 2.52 Å | (50b) |
| 1.90 Å | (60) |
Geological EnvironmentHide
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Geological Setting:
Oxidized zones of U- and As-bearing hydrothermal deposits.
Type Occurrence of UranospiniteHide
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Place of Conservation of Type Material:
State Museum for Mineralogy and Geology, Dresden. Mining Academy, freiberg, Saxony, Germany: #21722.
Associated Minerals at Type Locality:
Synonyms of UranospiniteHide
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Other Language Names for UranospiniteHide
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Relationship of Uranospinite to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Fluorescence of UranospiniteHide
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Bright lemon-yellow (UV).
Other InformationHide
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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for UranospiniteHide
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References for UranospiniteHide
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Reference List:
Localities for UranospiniteHide
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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
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.