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Laurentianite
A valid IMA mineral species
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About Laurentianite
Formula:
Na3Nb3Si4O17 · 9H2O
Colour:
Colorless
Lustre:
Vitreous
Specific Gravity:
2.464 (Calculated)
Crystal System:
Trigonal
Name:
Named after Laurentian University, Sudbury, Ontario, Canada, where the research characterizing the mineral was done.
This page provides mineralogical data about Laurentianite.
Unique Identifiers
Mindat ID:
40272
Long-form identifier:
mindat:1:1:40272:7
IMA Classification of Laurentianite
Classification of Laurentianite
9.CP.15
9 : SILICATES (Germanates)
C : Cyclosilicates
P : 12-membered and larger rings
9 : SILICATES (Germanates)
C : Cyclosilicates
P : 12-membered and larger rings
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 for Standard |
|---|---|---|
| Lre | 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 Laurentianite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Colorless
Comment:
could not be measured owing to the small size of the crystals
Cleavage:
None Observed
Parting:
None observed.
Fracture:
Splintery
Density:
2.464 g/cm3 (Calculated)
Optical Data of Laurentianite
Type:
Uniaxial (-)
RI values:
nω = 1.612(2) nε = 1.604(2)
Max. Birefringence:
δ = 0.008
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic
Chemistry of Laurentianite
Mindat Formula:
Na3Nb3Si4O17 · 9H2O
Element Weights:
Crystallography of Laurentianite
Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
P3
Setting:
P3
Cell Parameters:
a = 9.937(1) Å, c = 7.004(1) Å
Ratio:
a:c = 1 : 0.705
Unit Cell V:
599 ų
Z:
1
Morphology:
Acicular, euhedral, and elongate along [001]. Occurs often in loose, randomly oriented groupings (‘nests’) of crystals.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0019711 | Laurentianite | Haring M M M, McDonald A M, Cooper M A, Poirier G A (2012) Laurentianite, [NbO(H2O)]3(Si2O7)2[Na(H2O)2]3, a new mineral from Mont Saint-Hilaire, Quebec: description, crystal-structure determination and paragenesis The Canadian Mineralogist 50 1265-1280 | 2012 | Mont Saint-Hilaire, Quebec, Canada | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.608 Å | (100) |
| 7.005 Å | (19) |
| 4.312 Å | (25) |
| 4.062 Å | (13) |
| 3.675 Å | (25) |
| 3.260 Å | (31) |
| 2.870 Å | (20) |
| 1.836 Å | (14) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47h : [Near-surface oxidized, dehydrated minerals] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 55 : Anthropogenic mine minerals |
Type Occurrence of Laurentianite
Place of Conservation of Type Material:
Royal Ontario Museum, Department of Natural History, 100 Queen’s Park, Toronto, ON, Canada M5S 2C6, catalogue number M55369.(Note: In CNMNC Newsletter No. 4 (2010) Mineralogical Magazine, 74, 797-800), deposition data were given in error. The error was corrected in CNMNC Newsletter No 7)
Synonyms of Laurentianite
Other Language Names for Laurentianite
Dutch:Laurentianiet
German:Laurentianit
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.CP.05 | Traskite | Ba21Ca(Fe2+,Mn,Ti)4(Ti,Fe,Mg)12(Si12O36)(Si2O7)6(O,OH)30Cl6 · 14H2O |
| 9.CP.10 | Megacyclite | Na8KSi9O18(OH)9 · 19H2O |
Fluorescence of Laurentianite
Non-fluorescent.
Other Information
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 Laurentianite
mindat.org URL:
https://www.mindat.org/min-40272.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Laurentianite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2010) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) CNMNC Newsletter No 4. Mineralogical Magazine, 74 (4) 797-800 doi:10.1180/s0026461x00038925
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2011) New minerals and nomenclature modifications approved in 2010, CNMNC Newsletter No 7. Mineralogical Magazine, 75 (1) 27-31 doi:10.1180/minmag.2011.075.1.27
Haring, M. M. M., McDonald, A. M., Cooper, M. A., Poirier, G. A. (2012) Laurentianite, [NbO(H2O)]3(Si2O7)2[Na(H2O)2]3, a new mineral from Mont Saint-Hilaire, Quebec: description, crystal-structure determination and paragenesis. The Canadian Mineralogist, 50 (5) 1265-1280 doi:10.3749/canmin.50.5.1265
Localities for Laurentianite
Showing 1 localities.
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 (TL) | |
| Williams et al. (2010) +1 other reference |
Quick NavTopAbout LaurentianiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada