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Astrocyanite-(Ce)

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Formula:
Cu2(Ce,Nd,La)2(UO2)(CO3)5(OH)2 · 1.5H2O
Colour:
Bright blue
Lustre:
Vitreous, Earthy
Hardness:
2 - 3
Specific Gravity:
3.80
Crystal System:
Hexagonal
Name:
From the Greek άστρον ("astron") for "star", κυανός ("kyanos") for "blue", in allusion to its colour and habit of the aggregates, and the dominant lanthanide element in its composition.
Unique combination of elements.


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Classification of Astrocyanite-(Ce)Hide

Approved
Approval Year:
1989
First Published:
1990
5.EF.05

5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
F : UO2:CO3 = 1:5
16b.1.6.1

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : AmBn(XO3)pZqxH2O & with (m+n):p = 1:1
11.11.17

11 : Carbonates
11 : Carbonates of Cr and U

Physical Properties of Astrocyanite-(Ce)Hide

Vitreous, Earthy
Transparency:
Translucent, Opaque
Colour:
Bright blue
Streak:
White, blue (bluish)
Hardness:
2 - 3 on Mohs scale
Density:
3.80 g/cm3 (Measured)    3.95 g/cm3 (Calculated)

Optical Data of Astrocyanite-(Ce)Hide

Type:
Uniaxial (-)
RI values:
nω = 1.688 nε = 1.638
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Strong
Comments:
Strongly pleochroic from bright blue to pale blue, almost colorless.

Chemical Properties of Astrocyanite-(Ce)Hide

Formula:
Cu2(Ce,Nd,La)2(UO2)(CO3)5(OH)2 · 1.5H2O
IMA Formula:
Cu2Ce2(UO2)(CO3)5(OH)2 · 1.5H2O

Crystallography of Astrocyanite-(Ce)Hide

Crystal System:
Hexagonal
Morphology:
Platy {001}

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
13.3 (40)
6.73 (100)
4.30 (50)
4.16 (60)
3.72 (90)
2.488 (40)
2.154 (40)
2.071 (40)
Comments:
114.6-mm Debye-Scherrer camera, copper Ka radiation

Type Occurrence of Astrocyanite-(Ce)Hide

General Appearance of Type Material:
Delicate rostettes of tablets.
Place of Conservation of Type Material:
Institut royal des Sciences naturalles de Belgique, Brussels, Belgium.
Geological Setting of Type Material:
Oxidation product of uraninite.
Associated Minerals at Type Locality:

Synonyms of Astrocyanite-(Ce)Hide

Other Language Names for Astrocyanite-(Ce)Hide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Kamotoite-(Y)8 photos of Astrocyanite-(Ce) associated with Kamotoite-(Y) on mindat.org.
Uranophane2 photos of Astrocyanite-(Ce) associated with Uranophane on mindat.org.
Uraninite2 photos of Astrocyanite-(Ce) associated with Uraninite on mindat.org.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.11.1StichtiteMg6Cr3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
11.11.2Rutherfordine(UO2)CO3Orth. mm2 : Imm2
11.11.3Joliotite(UO2)CO3 · nH2OOrth.
11.11.4GrimseliteK3Na(UO2)(CO3)3 · H2OHex.
11.11.5BayleyiteMg2(UO2)(CO3)3 · 18H2OMon.
11.11.6MetazelleriteCa(UO2)(CO3)2 · 3H2OOrth.
11.11.7ZelleriteCa(UO2)(CO3)2 · 5H2OOrth.
11.11.8WyartiteCaU5+(UO2)2(CO3)O4(OH) · 7H2OOrth.
11.11.9UrancalcariteCa(UO2)3(CO3)(OH)6 · 3H2OOrth.
11.11.10SharpiteCa(UO2)6(CO3)5(OH)4 · 6H2OOrth.
11.11.11VogliteCa2Cu(UO2)(CO3)4 · 6H2OMon.
11.11.12AndersoniteNa2Ca(UO2)(CO3)3 · 6H2OTrig. 3 : R3
11.11.13SwartziteMgCa(UO2)(CO3)3 · 12H2OMon. 2/m : P21/m
11.11.14RabbittiteCa3Mg3(UO2)2(CO3)6(OH)4 · 18H2OMon.
11.11.15Kamotoite-(Y)Y2(UO2)4(CO3)3O4 · 14H2OMon. 2/m
11.11.16Shabaite-(Nd)Ca(Nd,Sm,Y)2(UO2)(CO3)4(OH)2 · 6H2O
11.11.18Bijvoetite-(Y)Y8(UO2)16(CO3)16O8(OH)8 · 39H2OMon.
11.11.19WidenmannitePb2(OH)2[(UO2)(CO3)2]Orth.
11.11.20ZnucaliteZn12Ca(UO2)(CO3)3(OH)22 · 4H2OOrth.

Other InformationHide

Notes:
Soluble with effervescence in dilute HCl.
Special Storage/
Display Requirements:
Radioactive
Health Risks:
This radioactive species sit always on massive uraninite and should be manipulated and stored with precautions.

References for Astrocyanite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Deliens, M., Piret, P. (1990) L'astrocyanite-(Ce), Cu2(TR)2(UO2)(CO3)5(OH)2·1,5 H2O, nouvelle espèce minérale de Kamoto, Shaba, Zaïre. European Journal of Mineralogy: 2: 407-411.
Deliens, M., Piret, P., Van Der Meersche, E. (1990) Les minéraux secondaires d'uranium du Zaïre, deuxieme complement. Royal Museum for Central Africa / Musée Royal de l'Afrique Centrale.
Jambor, J.L., Puziewicz, J. (1991) New mineral names. American Mineralogist: 76: 665-671.
Mandarino, J.A. (1997) New Minerals 1990-1994. Mineralogical Record, Inc., Tucson, AZ.

Internet Links for Astrocyanite-(Ce)Hide

Localities for Astrocyanite-(Ce)Hide

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.
Democratic Republic of Congo (Zaïre) (TL)
 
  • Katanga (Shaba)
    • Katanga Copper Crescent
      • Kolwezi District
        • Kamoto
[Mandarino, 1997]; Eur. J. Mineral., 1990, 2
Mineral and/or Locality  
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