Magnioursilite
A valid IMA mineral species - grandfathered
This page is currently not sponsored. Click here to sponsor this page.
About Magnioursilite
Formula:
Mg4(UO2)4(Si2O5)5(OH)6 · 20H2O
Colour:
Lemon-yellow
Hardness:
3
Specific Gravity:
3.254
Name:
Named for its chemical composition as a magnesium uranyl silicate.
Magnioursilite was originally described in 1957 as “ursilite” (now discredited) from the Oktyabr’skoye deposit, Kyzyltyube-Saj, Samgar Steppe, Tajikistan.
Forms a solid solution with calcioursilite.
Forms a solid solution with calcioursilite.
Unique Identifiers
Mindat ID:
11332
Long-form identifier:
mindat:1:1:11332:8
GUID
(UUID V4):
(UUID V4):
89c2b5a2-8eae-41f2-957b-5075b8121e40
IMA Classification of Magnioursilite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1957
Classification of Magnioursilite
9.AK.35
9 : SILICATES (Germanates)
A : Nesosilicates
K : Uranyl neso- and polysilicates
9 : SILICATES (Germanates)
A : Nesosilicates
K : Uranyl neso- and polysilicates
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 |
---|---|---|
Mau | 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 Magnioursilite
Chemistry of Magnioursilite
Mindat Formula:
Mg4(UO2)4(Si2O5)5(OH)6 · 20H2O
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.98 Å | (100) |
4.58 Å | (80) |
3.37 Å | (80) |
3.06 Å | (100) |
2.42 Å | (60) |
2.30 Å | (90) |
2.20 Å | (50) |
2.07 Å | (90) |
1.981 Å | (60) |
1.798 Å | (60) |
Comments:
Oktyabr'skoye U Deposit, Tajikistan. The data are from the Chernikov et al. (1957).
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 Magnioursilite
General Appearance of Type Material:
Lemon-yellow earthy or nodular incrustations, rarely radiating spherulites.
Place of Conservation of Type Material:
No defined type material.
Geological Setting of Type Material:
Occurs along joints in granite porphyry.
Associated Minerals at Type Locality:
Synonyms of Magnioursilite
Ursilite (in part)
Other Language Names for Magnioursilite
German:Magnioursilit
Spanish:Magnioursilita
Common Associates
Associated Minerals Based on Photo Data:
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 | Calcioursilite | Ca4(UO2)4(Si2O5)5(OH)6 · 15H2O |
9.AK.40 | Uranosilite | UO3 · 7SiO2 |
Fluorescence of Magnioursilite
Fluorescent in greenish yellow under ultraviolet light.
Other Information
Notes:
Easily soluble in acids (especially when warm), turning the solution green and yielding silica gel.
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 Magnioursilite
mindat.org URL:
https://www.mindat.org/min-11332.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Magnioursilite
Reference List:
Localities for Magnioursilite
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 | |
| |
Tajikistan (TL) | |
|
Quick NavTopAbout MagnioursiliteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Chemistry X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Uranus Mine, Kleinrückerswalde, Annaberg-Buchholz, Erzgebirgskreis, Saxony, Germany