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Belakovskiite

This page kindly sponsored by Mark Kucera
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About BelakovskiiteHide

Dmitriy Belakovskyi
Formula:
Na7(UO2)(SO4)4(SO3OH)(H2O)3
Colour:
yellow green
Lustre:
Vitreous, Sub-Vitreous
Hardness:
2
Specific Gravity:
2.953 (Calculated)
Crystal System:
Triclinic
Name:
Named in 2013 by Anthony R. Kampf, Jakub Plášil, Anatoly V. Kasatkin, and Joseph Marty in honor of Dimitrii Belakovskii, curator of the Fersman Mineralogical Museum, Moscow, Russia.
Second uranyl hydrosulfate after meisserite. Further similarity to fermiite, klaprothite, natrozippeite, oppenheimerite, ottohahnite, péligotite, and plášilite.


Classification of BelakovskiiteHide

Approved
Approval Year:
2013

Physical Properties of BelakovskiiteHide

Vitreous, Sub-Vitreous
Transparency:
Transparent
Colour:
yellow green
Streak:
White
Hardness:
Comment:
Estimated
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.953 g/cm3 (Calculated)

Optical Data of BelakovskiiteHide

Type:
Biaxial (+)
RI values:
nα = 1.500 nβ = 1.511 nγ = 1.523
2V:
Measured: 87° , Calculated: 88°
Birefringence:
0.023
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Optical Extinction:
X~a
Pleochroism:
Non-pleochroic

Chemical Properties of BelakovskiiteHide

Formula:
Na7(UO2)(SO4)4(SO3OH)(H2O)3

Crystallography of BelakovskiiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 5.4581(3) Å, b = 11.3288(6) Å, c = 18.4163(13) Å
α = 104.786(7)°, β = 90.092(6)°, γ = 96.767(7)°
Ratio:
a:b:c = 0.482 : 1 : 1.626
Unit Cell V:
1,092.77 ų (Calculated from Unit Cell)
Z:
2
Comment:
P1¯

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.96(35)
8.46(29)
5.19(100)
4.66(58)
3.568(37)
3.057(59)
2.930(27)
1.832(29)
Comments:
From Type Description.

Type Occurrence of BelakovskiiteHide

General Appearance of Type Material:
Yellow green acicular crystals. Crystals of belakovskiite are very pale yellowish-green hair-like fibres up to 2 mm long and usually no more than a few μm in diameter. The fibres are elongated on [100] and slightly flattened on {021}.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Natural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue number 64055, and the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration
Geological Setting of Type Material:
Sandstone/siltstone layers containing uraninite and secondary copper mineralssecodndary species.
Associated Minerals at Type Locality:

Synonyms of BelakovskiiteHide

Other InformationHide

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 BelakovskiiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Plášil, J., Kasatkin, A.V. and Marty, J. (2013) Belakovskiite, IMA 2013-075. CNMNC Newsletter No. 18, December 2013, page 3252; Mineralogical Magazine, 77, 3249-3258.

Internet Links for BelakovskiiteHide

Localities for BelakovskiiteHide

ⓘ - 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.
USA (TL)
 
  • Utah
    • San Juan Co.
      • White Canyon District
        • Red Canyon
Kampf, A.R., Plášil, J., Kasatkin, A.V. and Marty, J. (2013) Belakovskiite, IMA 2013-075. CNMNC Newsletter No. 18, December 2013, page 3252; Mineralogical Magazine, 77, 3249-3258.
Mineral and/or Locality  
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