Sedovite
A valid IMA mineral species
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About Sedovite
Georgii Yakovlevich Sedov
Formula:
U(MoO4)2
Colour:
Brown to reddish brown
Hardness:
3
Specific Gravity:
4.2
Crystal System:
Orthorhombic
Name:
Named in honor of Georgii Yakovkevich Sedov (Гео́ргий Я́ковлевич Седо́в) (5 May [O.S. 23 April] 1877, Krivaya Kosa, Taganrog district, Russian Empire – 5 March [O.S. 20 February] 1914) Russian polar explorer. He died at sea on an attempt to reach the North Pole. Several geographic features (glacier, island, two capes) are also named after him.
The mineral shows disorder of molybdenum atoms. A microporous structure.
Unique Identifiers
Mindat ID:
3602
Long-form identifier:
mindat:1:1:3602:9
GUID
(UUID V4):
(UUID V4):
a1a2da29-8506-45ce-81a8-53d7a16307b4
IMA Classification of Sedovite
Approved
IMA Formula:
U4+(MoO4)2
First published:
1965
Classification of Sedovite
7.HA.05
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
H : Uranium and uranyl molybdates and wolframates
A : With U4+
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
H : Uranium and uranyl molybdates and wolframates
A : With U4+
48.4.1.1
48 : ANHYDROUS MOLYBDATES AND TUNGSTATES
4 : Miscellaneous
48 : ANHYDROUS MOLYBDATES AND TUNGSTATES
4 : Miscellaneous
27.3.5
27 : Sulphites, Chromates, Molybdates and Tungstates
3 : Molybdates
27 : Sulphites, Chromates, Molybdates and Tungstates
3 : Molybdates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Sdv | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Sedovite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Sedovite
Transparency:
Opaque
Colour:
Brown to reddish brown
Hardness:
3 on Mohs scale
Cleavage:
Distinct/Good
one cleavage parallel to elongation
one cleavage parallel to elongation
Density:
4.2 g/cm3 (Measured)
Optical Data of Sedovite
Type:
Biaxial
Anisotropism:
slightly anisotropic - masked by internal reflections
Dispersion:
extreme
Colour in reflected light:
gray with brownish tint
Internal Reflections:
strong red
Pleochroism:
Weak
Comments:
Z reddish-brown, X and Y paler reddish-brown.
Comments:
nearly opaque
Chemistry of Sedovite
Mindat Formula:
U(MoO4)2
Elements listed:
Crystallography of Sedovite
Crystal System:
Orthorhombic
Cell Parameters:
a = 3.36(6) Å, b = 11.08(3) Å, c = 6.42(5) Å
Ratio:
a:b:c = 0.303 : 1 : 0.579
Unit Cell V:
239.01 ų (Calculated from Unit Cell)
Comment:
at 100K the substance is monoclinic, C2/c, a ≈ 6.96 Å, b ≈ 9.07 Å, c ≈ 12.27 Å, V ≈ 775 Å3
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.193 Å | (10) |
| 11.04 Å | (9) |
| 3.370 Å | (9) |
| 3.064 Å | (9) |
| 5.530 Å | (8) |
| 2.775 Å | (6) |
| 2.559 Å | (6) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47f : [Uranyl (U⁶⁺) minerals] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Sedovite
Associated Minerals at Type Locality:
Reference:
Skvortsova, K.V., Sidorenko, G.A. (1965) Sedovite, a new supergene mineral of uranium and molybdenum. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 94(5): 548-554.
Other Language Names for Sedovite
Related Minerals - Strunz-mindat Grouping
| 7.HA.10 | Cousinite | MgU2Mo2O11 · 6H2O |
| 7.HA.15 | Moluranite | H4U4+(UO2)3(MoO4)7 · 18H2O |
Other Information
Notes:
Soluble in conc. HCl, HNO3, and H2SO4 only with difficulty, on boiling
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 Sedovite
mindat.org URL:
https://www.mindat.org/min-3602.html
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References for Sedovite
Reference List:
Localities for Sedovite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| Chatterjee (1977) |
Egypt | |
| Bisher (2012) |
India | |
| Deepthi et al. (2015) |
Kazakhstan (TL) | |
| Skvortsova et al. (1965) +1 other reference |
Mexico | |
| Excalibur Mineral Co. specimen |
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Picacho, Bacoachi, Bacoachi Municipality, Sonora, Mexico