Uranosilite
A valid IMA mineral species
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Formula:
UO3 · 7SiO2
Colour:
Yellowish-white
Lustre:
Vitreous
Specific Gravity:
3.25 (Calculated)
Crystal System:
Orthorhombic
Name:
The name reflects its compostion: uranium (uran) and silicium (sil).
This page provides mineralogical data about Uranosilite.
Unique Identifiers
Mindat ID:
4110
Long-form identifier:
mindat:1:1:4110:8
GUID
(UUID V4):
(UUID V4):
76ffdb05-efe8-4f0a-ab98-c388e5287683
IMA Classification of Uranosilite
Approved
IMA Formula:
(UO2)Si7O15
Approval year:
1981
First published:
1983
Classification of Uranosilite
9.AK.40
9 : SILICATES (Germanates)
A : Nesosilicates
K : Uranyl neso- and polysilicates
9 : SILICATES (Germanates)
A : Nesosilicates
K : Uranyl neso- and polysilicates
53.3.3.2
53 : NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
3 : Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
53 : NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
3 : Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
14.16.1
14 : Silicates not Containing Aluminum
16 : Silicates of U
14 : Silicates not Containing Aluminum
16 : Silicates of U
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 |
|---|---|---|
| Usi | 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 Uranosilite
Optical Data of Uranosilite
Type:
Biaxial (-)
RI values:
nα = 1.570(2) nγ = 1.584(2)
Max Birefringence:
δ = 0.014
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:
Moderate
Dispersion:
r > v
Chemistry of Uranosilite
Mindat Formula:
UO3 · 7SiO2
Elements listed:
Common Impurities:
Pb,K
Crystallography of Uranosilite
Crystal System:
Orthorhombic
Cell Parameters:
a = 11.60 Å, b = 14.68 Å, c = 12.83 Å
Ratio:
a:b:c = 0.79 : 1 : 0.874
Unit Cell V:
2,184.80 ų (Calculated from Unit Cell)
Z:
6
Morphology:
Needlelike crystals are visible only under the scanning electron microscope at high magnification.
Comment:
Point Group: 222 or 2/m 2/m 2/m :;Space Group: P 221 21 ; Pmmb; or Pmcb
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.30 Å | (100) |
| 11.58 Å | (90) |
| 6.19 Å | (90) |
| 3.50 Å | (80) |
| 2.77 Å | (70) |
| 3.42 Å | (60) |
| 3.20 Å | (60) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Uranosilite
General Appearance of Type Material:
Intimate intergrowth with studtite and uranophane. Needle-like crystals are discernible only by SEM at high magnification.
Place of Conservation of Type Material:
n.d.
Geological Setting of Type Material:
Uranium deposit
Associated Minerals at Type Locality:
Reference:
Walenta, K. (1983) Uranosilite, ein neues Mineral aus der Uranlagerstätte von Menzenschwand im südlichen Schwarzwald. Neues Jahrbuch für Mineralogie, Monatshefte: 1983: 259-269.
Synonyms of Uranosilite
Other Language Names for Uranosilite
German:Uranosilit
Spanish:Uranosilita
Related Minerals - Strunz-mindat Grouping
| 9.AK. | Orlite | Pb3(UO2)3(Si2O7)2 · 6H2O |
| 9.AK.05 | Soddyite | (UO2)2SiO4 · 2H2O |
| 9.AK.10 | Cuprosklodowskite | Cu(UO2)2(SiO3OH)2 · 6H2O |
| 9.AK.10 | Oursinite | Co(UO2)2(SiO3OH)2 · 6H2O |
| 9.AK.10 | Sklodowskite | Mg(UO2)2(SiO3OH)2 · 6H2O |
| 9.AK.15 | Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| 9.AK.15 | Kasolite | Pb(UO2)(SiO4) · H2O |
| 9.AK.15 | Natroboltwoodite | Na(UO2)(SiO3OH) · H2O |
| 9.AK.15 | Parauranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| 9.AK.15 | Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| 9.AK.20 | Swamboite-(Nd) | Nd0.333[(UO2)(SiO3OH)](H2O)~2.5 |
| 9.AK.25 | Haiweeite | Ca(UO2)2[Si5O12(OH)2] · 6H2O |
| 9.AK.25 | Metahaiweeite | Ca(UO2)2Si6O15 · nH2O |
| 9.AK.30 | Weeksite | K2(UO2)2(Si5O13) · 4H2O |
| 9.AK.30 | Coutinhoite | ThxBa(1-2x)(UO2)2Si5O13 · (H2O)1+y (0 < x < 0.5 and 0 < y < (2+x)) |
| 9.AK.35 | Magnioursilite | Mg4(UO2)4(Si2O5)5(OH)6 · 20H2O |
| 9.AK.35 | Calcioursilite | Ca4(UO2)4(Si2O5)5(OH)6 · 15H2O |
Other Information
Notes:
Radioactive
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 Uranosilite
mindat.org URL:
https://www.mindat.org/min-4110.html
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References for Uranosilite
Reference List:
Localities for Uranosilite
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.
Germany (TL) | |
| NJMM (1983) +1 other reference |
Romania | |
| Hîrtopanu P. et al. (2004) |
USA | |
| Rocks & Min 80:245 |
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