Larisaite
A valid IMA mineral species
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About Larisaite
Larisa Nikolaevna Belova (1923 - 1998) - Russian mineralogist.
Formula:
Na(H3O)(UO2)3(SeO3)O2 · 4H2O
Colour:
Canary- yellow
Lustre:
Vitreous
Hardness:
1
Specific Gravity:
4.46 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honor of Larisa Nikolaevna Belova (Лариса Николаевна Белова) (1923 - 1998), mineralogist and crystallographer who made a significant contribution to the knowledge on the uranium minerals.
This page provides mineralogical data about Larisaite.
Unique Identifiers
Mindat ID:
26392
Long-form identifier:
mindat:1:1:26392:4
GUID
(UUID V4):
(UUID V4):
09b8d412-ffd0-452d-9ba7-41c8418cc6ae
IMA Classification of Larisaite
Approved
IMA Formula:
Na(H3O)(UO2)3(Se4+O3)2O2 · 4H2O
Approval year:
2002
First published:
2004
Classification of Larisaite
4.JH.25
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
H : Selenites without additional anions, with H2O
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
H : Selenites without additional anions, with H2O
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 |
|---|---|---|
| Ls | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Larisaite
Vitreous
Transparency:
Transparent, Translucent
Comment:
Pearly sheen on cleavage planes.
Colour:
Canary- yellow
Streak:
Yellow
Hardness:
1 on Mohs scale
Tenacity:
Sectile
Cleavage:
Perfect
On (010)
On (010)
Fracture:
Irregular/Uneven
Density:
4.46 g/cm3 (Calculated)
Comment:
Could not be measured due to the porosity of most crystals. Calculated density is 4.46 (empirical formula) and 4.50 (structural formula).
Optical Data of Larisaite
Type:
Biaxial (-)
RI values:
nα = 1.597(2) nβ = 1.770(5) nγ = 1.775(5)
2V:
Measured: 20°
Max Birefringence:
δ = 0.178
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:
Very High
Dispersion:
Strong; r < v
Optical Extinction:
X = b; Z parallel to the elongation. Extinction angle with respect to the elongation direction is 1-3°.
Pleochroism:
Visible
Comments:
Y = Z = yellow; X = light greenish yellow.
Comments:
Absorption: Y = Z > X.
Chemistry of Larisaite
Mindat Formula:
Na(H3O)(UO2)3(SeO3)O2 · 4H2O
Crystallography of Larisaite
Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Pm
Setting:
P1 1m
Cell Parameters:
a = 6.9806(9) Å, b = 7.646(1) Å, c = 17.249(2) Å
Ratio:
a:b:c = 0.913 : 1 : 2.256
Unit Cell V:
0.00 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Rough, corrugated lamellar crystals with {010} dominant.
Twinning:
None observed.
Comment:
Non-standard space-group setting P11m.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.67 Å | (100) |
| 3.107 Å | (77) |
| 2.874 Å | (53) |
| 8.63 Å | (43) |
| 3.85 Å | (40) |
| 7.02 Å | (33) |
| 3.176 Å | (33) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Larisaite
General Appearance of Type Material:
Coarse lamellar crystals up to 1 mm and radial aggregates up to 2 mm. Crystal faces are rough and usually corrugated.
Place of Conservation of Type Material:
Geoscientific Collections, Freiberg University of Mining and Technology, Freiberg, Germany; 80251.
Geological Setting of Type Material:
A secondary mineral found in a sedimentary rock.
Associated Minerals at Type Locality:
Synonyms of Larisaite
Other Language Names for Larisaite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 4.JH. | Bernardevansite | Al2(SeO3)3 · 6H2O |
| 4.JH.05 | Chalcomenite | CuSeO3 · 2H2O |
| 4.JH.10 | Ahlfeldite | Ni(SeO3) · 2H2O |
| 4.JH.10 | Clinochalcomenite | CuSeO3 · 2H2O |
| 4.JH.10 | Cobaltomenite | CoSeO3 · 2H2O |
| 4.JH.15 | Mandarinoite | Fe3+2(Se4+O3)3 · (6-x)H2O (x = 0.0-1.0) |
| 4.JH.20 | Orlandiite | Pb3(SeO3)(Cl,OH)4 · H2O |
| 4.JH.30 | Nestolaite | CaSeO3 · H2O |
Fluorescence of Larisaite
Fluorescence under the UV light is green (Excitation wavelength 250 nm).
Other Information
Notes:
Grinding of larisaite leads to its amorphization.
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 Larisaite
mindat.org URL:
https://www.mindat.org/min-26392.html
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External Links:
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References for Larisaite
Reference List:
Chukanov, Nikita V., Pushcharovsky, Dmitry Y.u., Pasero, Marco, Merlino, Stefano, Barinova, Anna V., Möckel, Steffen, Pekov, Igor V., Zadov, Aleksandr E., Dubinchuk, Viktor T. (2004) Larisaite, Na(H3O)(UO2)3(SeO3)2O2 · 4H2O, a new uranyl selenite mineral from Repete mine, San Juan County, Utah, U.S.A. European Journal of Mineralogy, 16 (2) 367-374 doi:10.1127/0935-1221/2004/0016-0367
Localities for Larisaite
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.
USA (TL) | |
| Chukanov et al. (2004) |
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Repete Mine, Montezuma Canyon Mining District, San Juan County, Utah, USA