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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Please feel free to link to this page.
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References for Uranosilite
Reference List:
Localities for Uranosilite
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).
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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
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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