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Urancalcarite

A valid IMA mineral species
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02872000017069191606755.jpg
Urancalcarite

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
06100130015575246467520.jpg
Urancalcarite, etc.

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
07908330014948092075094.jpg
Urancalcarite

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
04518030017057115831562.jpg
Urancalcarite

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
01370440015504059264295.jpg
Urancalcarite, etc.

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
05174230014951354981753.jpg
Urancalcarite

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
06766070017069191619285.jpg
Urancalcarite

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
06100130015575246467520.jpg
Urancalcarite, etc.

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
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About UrancalcariteHide

Formula:
Ca(UO2)3(CO3)(OH)6 · 3H2O
Colour:
Light yellow, bright yellow
Lustre:
Vitreous
Hardness:
2 - 3
Specific Gravity:
4.03
Crystal System:
Orthorhombic
Name:
The name reflects its composition: uranyl plus calcareous components.
This page provides mineralogical data about Urancalcarite.


Unique IdentifiersHide

Mindat ID:
4101
Long-form identifier:
mindat:1:1:4101:6
GUID
(UUID V4):
58e9cfcd-2bae-49cf-b42d-0c3da1541c13

IMA Classification of UrancalcariteHide

Classification of UrancalcariteHide

Strunz-mindat (2024):
5.EA.10

5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
A : UO2:CO3 > 1:1
Dana 8th ed.:
16b.5.2.1

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
5 : AmBn(XO3)pZqxH2O & with (m+n):p = 4:1
Hey's CIM Ref.:
11.11.9

11 : Carbonates
11 : Carbonates of Cr and U

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
UcaIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of UrancalcariteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Light yellow, bright yellow
Streak:
Pale yellow
Hardness:
2 - 3 on Mohs scale
Cleavage:
None Observed
Density:
4.03 g/cm3 (Measured)    4.10 g/cm3 (Calculated)

Optical Data of UrancalcariteHide

Type:
Biaxial (-)
RI values:
nα = 1.660(3) nβ = 1.712(2) nγ = 1.736(2)
2V:
Measured: 67° , Calculated: 66°
Max Birefringence:
δ = 0.076
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak

Chemistry of UrancalcariteHide

Mindat Formula:
Ca(UO2)3(CO3)(OH)6 · 3H2O
Elements listed:
C, Ca, H, O, U - search for minerals with similar chemistry

Crystallography of UrancalcariteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 15.42(3) Å, b = 16.08(4) Å, c = 6.970(6) Å
Ratio:
a:b:c = 0.959 : 1 : 0.433
Unit Cell V:
1,728.24 ų (Calculated from Unit Cell)
Z:
4
Comment:
Point Group: 2/m 2/m 2/m or mm2.; Space Group: P bnm or P bn21

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.06 Å(100)
4.02 Å(80)
3.488 Å(70)
3.193 Å(50)
2.101 Å(50)
2.829 Å(40)
7.00 Å(30)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47c : [Carbonates, phosphates, borates, nitrates]
47f : [Uranyl (U⁶⁺) minerals]

Type Occurrence of UrancalcariteHide

Type Locality:
ⓘ Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
Place of Conservation of Type Material:
Royal Museum of Central Africa, Tervuren, Belgium, RGM13995.
Associated Minerals at Type Locality:
WyartiteUraniniteUraniniteMasuyite
Reference:
Deliens M, Piret P (1984) L'urancalcarite, Ca(UO2)3CO3(OH)6.3H2O, nouveau minéral de Shinkolobwe, Shaba, Zaïre. Bulletin de la Société française de Minéralogie et de Cristallographie (107: 21-24.

Synonyms of UrancalcariteHide

Other Language Names for UrancalcariteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Urancalcarite associated with UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
3 photos of Urancalcarite associated with WyartiteCaU5+(UO2)2(CO3)O4(OH) · 7H2O
2 photos of Urancalcarite associated with GypsumCaSO4 · 2H2O
2 photos of Urancalcarite associated with RameauiteK2Ca(UO2)6O6(OH)4 · 6H2O
1 photo of Urancalcarite associated with LiebigiteCa2(UO2)(CO3)3 · 11H2O
1 photo of Urancalcarite associated with AgrinieriteK2(Ca,Sr)[(UO2)3O3(OH)2]2 · 5H2O

Related Minerals - Strunz-mindat GroupingHide

5.EA.05UM1997-24-CO:CaCuHUCa2Cu(UO2)2(CO3)2O3 · 3H2O
5.EA.15WyartiteCaU5+(UO2)2(CO3)O4(OH) · 7H2OOrth. 2 2 2 : P21 21 21
5.EA.20Oswaldpeetersite(UO2)2(CO3)(OH)2 · 4H2OMon. 2/m : P21/b
5.EA.25RoubaultiteCu2(UO2)3(CO3)2O2(OH)2 · 4H2OTric. 1 : P1
5.EA.30Kamotoite-(Y)Y2(UO2)4(CO3)3O4 · 14H2OMon. 2/m
5.EA.35SharpiteCa(UO2)3(CO3)4 · 3H2OOrth. mmm (2/m 2/m 2/m) : Cmcm

Other InformationHide

Notes:
Radioactive
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 UrancalcariteHide

References for UrancalcariteHide

Localities for UrancalcariteHide

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 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.
China
 
  • Hunan
Aizhen Wang (1992)
Czech Republic
 
  • Karlovy Vary Region
    • Karlovy Vary District
Lapis 2002 (7/8)
DR Congo (TL)
 
  • Haut-Katanga
    • Kambove Territory
      • Shinkolobwe
Deliens et al. (1984) +1 other reference
France
 
  • Nouvelle-Aquitaine
    • Haute-Vienne
      • Bellac
        • Compreignac
Chuck Adan Collection
  • Occitanie
    • Hérault
      • Lodève
        • Le Puech
Caubel (1997)
Norway
 
  • Buskerud
    • Krødsherad
Roy Kristiansen (1989) +1 other reference
Romania
 
  • Suceava County
Hîrtopanu P. et al. (2004)
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