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Oswaldpeetersite

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Formula:
(UO2)2(CO3)(OH)2 · 4H2O
System:
Monoclinic
Colour:
Canary yellow
Lustre:
Vitreous
Hardness:
2 - 3
Name:
After Maurice Oswald Peeters, University of Leuven, Belgium
This page provides mineralogical data about Oswaldpeetersite.

Classification of Oswaldpeetersite

Approved 2000
5.EA.20

5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
A : UO2:CO3 > 1:1
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Type Occurrence of Oswaldpeetersite

Physical Properties of Oswaldpeetersite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Canary yellow
Streak:
Pale yellow
Hardness (Mohs):
2 - 3
Hardness Data:
Estimated
Fracture:
Irregular/Uneven
Density:
4.1 - 4.55 g/cm3 (Measured)    4.55 g/cm3 (Calculated)

Crystallography of Oswaldpeetersite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 4.1425Å, b = 14.098Å, c = 18.374Å
β = 103.62°
Ratio:
a:b:c = 0.294 : 1 : 1.303
Unit Cell Volume:
V 1042.8 ų
Z:
4
Morphology:
{100}, {010}, {001}, acicular and heavily striated parallel to the length.
Twinning:
None mentioned

Optical Data of Oswaldpeetersite

Type:
Biaxial (-)
RI values:
nα = 1.583 nβ = 1.669 nγ = 1.712
Max Birefringence:
δ = 0.129
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Oswaldpeetersite

Formula:
(UO2)2(CO3)(OH)2 · 4H2O
Essential elements:
All elements listed in formula:

Relationship of Oswaldpeetersite to other Species

5.EA.05UM1997-24-CO:CaCuHUCa2Cu(UO2)2(CO3)2O3 · 3H2O
5.EA.10UrancalcariteCa(UO2)3(CO3)(OH)6 · 3H2O
5.EA.15WyartiteCaU5+(UO2)2(CO3)O4(OH) · 7H2O
5.EA.25RoubaultiteCu2(UO2)3(OH)10 · 5H2O
5.EA.30Kamotoite-(Y)Y2(UO2)4(CO3)3O4 · 14H2O
5.EA.35SharpiteCa(UO2)6(CO3)5(OH)4 · 6H2O

Other Names for Oswaldpeetersite

Name in Other Languages:

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.

References for Oswaldpeetersite

Reference List:
Canadian Mineralogist (2001): 39: 1685-1689.

Internet Links for Oswaldpeetersite

Localities for Oswaldpeetersite

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
USA (TL)
 
  • Utah
    • San Juan Co.
      • White Canyon District
        • White Canyon
Can Min (2001) 39, 6, 1685-1689
Mineral and/or Locality  
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