Belakovskiite
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About Belakovskiite
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 Belakovskiite
Approved
Approval Year:
2013
Physical Properties of Belakovskiite
Vitreous, Sub-Vitreous
Transparency:
Transparent
Colour:
yellow green
Streak:
White
Hardness:
2 on Mohs scale
Comment:
Estimated
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.953 g/cm3 (Calculated)
Optical Data of Belakovskiite
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.
and does not take into account mineral colouration.
Surface Relief:
Low
Optical Extinction:
X~a
Pleochroism:
Non-pleochroic
Chemical Properties of Belakovskiite
Formula:
Na7(UO2)(SO4)4(SO3OH)(H2O)3
Crystallography of Belakovskiite
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)°
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 Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 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 Belakovskiite
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 Belakovskiite
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 Belakovskiite
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 Belakovskiite
mindat.org URL:
https://www.mindat.org/min-45960.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Belakovskiite
ⓘ - 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.
- 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.
USA (TL) | |
| 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. |
Blue Lizard Mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA