Calciouranoite
A valid IMA mineral species
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About Calciouranoite
Formula:
(Ca,Ba,Pb)U2O7 · 5H2O
Colour:
Red-orange, yellow-brown, orange-brown, brown
Lustre:
Greasy, Dull
Hardness:
4
Specific Gravity:
4.62
Name:
Named in allusion to its chemical composition, containing CALCIum and URANium.
This page provides mineralogical data about Calciouranoite.
Unique Identifiers
Mindat ID:
828
Long-form identifier:
mindat:1:1:828:4
GUID
(UUID V4):
(UUID V4):
5c0b647f-2bca-4cde-868b-4c8d2a1642d3
IMA Classification of Calciouranoite
Approved
IMA Formula:
(Ca,Ba,Pb,K,Na)U2O7 · 5H2O
Classification of Calciouranoite
4.GB.20
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
5.4.2.1
5 : OXIDES CONTAINING URANIUM OR THORIUM
4 : AX2O7·xH2O
5 : OXIDES CONTAINING URANIUM OR THORIUM
4 : AX2O7·xH2O
7.16.18
7 : Oxides and Hydroxides
16 : Oxides of U
7 : Oxides and Hydroxides
16 : Oxides of U
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Cun | 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 Calciouranoite
Greasy, Dull
Transparency:
Translucent
Colour:
Red-orange, yellow-brown, orange-brown, brown
Hardness:
4 on Mohs scale
Cleavage:
Imperfect/Fair
One direction, pinacoidal.
One direction, pinacoidal.
Density:
4.62 g/cm3 (Measured)
Optical Data of Calciouranoite
Type:
Biaxial (-)
RI values:
nα = 1.760 nβ = 1.840 nγ = 1.870
Max Birefringence:
δ = 0.110
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v
Pleochroism:
Strong
Comments:
X = Y = deep lemon-yellow; Z = pale yellow to almost colorless
Chemistry of Calciouranoite
Mindat Formula:
(Ca,Ba,Pb)U2O7 · 5H2O
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.00 Å | (1) |
| 3.406 Å | (2) |
| 3.050 Å | (2) |
| 2.68 Å | (1) |
| 2.00 Å | (1) |
Comments:
distinct lines (2), pattern indistinct otherwise.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Calciouranoite
General Appearance of Type Material:
Prismatic to acicular crystals, radial fibrous in spherulites
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 81272.
Geological Setting of Type Material:
Oxidation zones of a U-Mo deposit
Associated Minerals at Type Locality:
Reference:
Rogova, V.P., Belov, L.N., Kiziyarov, G.N., and Koznetsova, N.N. (1974) Calciouranoite, a new hydroxide of uranium. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 103, issue 1, 108-109.
Synonyms of Calciouranoite
Other Language Names for Calciouranoite
German:Calciouranoit
Calciumuranoit
Calciumuranoit
Spanish:Calciouranoita
Calciumuranoita
Calciumuranoita
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Calciouranoite associated with Metacalciouranoite | (Ca,Ba,Pb,K2)U2O7 · 2H2O |
| 1 photo of Calciouranoite associated with Uraninite | UO2 |
Related Minerals - Strunz-mindat Grouping
| 4.GB.05 | Agrinierite | K2(Ca,Sr)[(UO2)3O3(OH)2]2 · 5H2O |
| 4.GB.05 | Compreignacite | K2(UO2)6O4(OH)6 · 7H2O |
| 4.GB.05 | Rameauite | K2Ca(UO2)6O6(OH)4 · 6H2O |
| 4.GB.10 | Becquerelite | Ca(UO2)6O4(OH)6 · 8H2O |
| 4.GB.10 | Billietite | Ba(UO2)6O4(OH)6 · 4-8H2O |
| 4.GB.10 | Protasite | Ba(UO2)3O3(OH)2 · 3H2O |
| 4.GB.15 | Richetite | (Fe3+,Mg)Pb 8.6(UO2)36O36(OH)24 · 41H2O |
| 4.GB.20 | Bauranoite | Ba(UO2)2(OH)6 · 1-2H2O |
| 4.GB.20 | Metacalciouranoite | (Ca,Ba,Pb,K2)U2O7 · 2H2O |
| 4.GB.25 | Fourmarierite | Pb(UO2)4O3(OH)4 · 4H2O |
| 4.GB.30 | Wölsendorfite | Pb7(UO2)14O19(OH)4 · 12H2O |
| 4.GB.35 | Masuyite | Pb(UO2)3O3(OH)2 · 3H2O |
| 4.GB.40 | Metavandendriesscheite | PbU7O22 · nH2O n < 12 |
| 4.GB.40 | Vandendriesscheite | PbU7O22 · 12H2O |
| 4.GB.45 | Vandenbrandeite | Cu(UO2)(OH)4 |
| 4.GB.50 | Sayrite | Pb2(UO2)5O6(OH)2 · 4H2O |
| 4.GB.55 | Curite | Pb3(H2O)2[(UO2)4O4(OH)3]2 |
| 4.GB.60 | Iriginite | (UO2)Mo2O7 · 3H2O |
| 4.GB.65 | Uranosphaerite | Bi(UO2)O2(OH) |
| 4.GB.70 | Holfertite | CaxU6+2-xTi(O8-xOH4x) · 3H2O |
| 4.GB.75 | Carlosbarbosaite | (UO2)2Nb2O6(OH)2 · 2H2O |
| 4.GB.80 | Gauthierite | KPb[(UO2)7O5(OH)7] · 8H2O |
| 4.GB.85 | Kroupaite | KPb0.5[(UO2)8O4(OH)10] · 10H2O |
| 4.GB.90 | Leesite | K(H2O)2[(UO2)4O2(OH)5] · 3H2O |
| 4.GB.95 | Shinkolobweite | Pb1.25[U5+(H2O)2(U6+O2)5O8(OH)2](H2O)5 |
| 4.GB.95 | Nollmotzite | Mg[U5+(U6+O2)2O4F3] · 4H2O |
Other Information
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 Calciouranoite
mindat.org URL:
https://www.mindat.org/min-828.html
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References for Calciouranoite
Reference List:
Localities for Calciouranoite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
China | |
| Long Lu et al. (2006) |
Czech Republic | |
| Pauliš et al. (2007) |
Russia (TL) | |
| Rogova et al. (1974) +2 other references |
Tajikistan | |
| Pekov (1998) |
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Strel'tsovskoe Mo-U ore field, Krasnokamensk, Krasnokamensky District, Zabaykalsky Krai, Russia