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Garronite-Na
A valid IMA mineral species
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About Garronite-Na
Formula:
Na6(Al6Si10O32) · 8.5H2O
Colour:
Pale yellow to white
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.19
Crystal System:
Monoclinic
Member of:
Name:
Na-analogue of garronnite-Ca first described from Northern Ireland. The original garronite is now garronite-Ca.
Unique Identifiers
Mindat ID:
46690
Long-form identifier:
mindat:1:1:46690:1
Similar Names
| Garronite-Ca | A valid IMA mineral species | Na2Ca5Al12Si20O64 · 27H2O |
IMA Classification of Garronite-Na
Approved
IMA Formula:
Na6(Al6Si10O32)·8.5H2O
Approval year:
2015
First published:
2016
Classification of Garronite-Na
9.GC.
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
C : Chains of doubly-connected 4-membered rings
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
C : Chains of doubly-connected 4-membered 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 |
|---|---|---|
| Grn-Na | 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 Garronite-Na
Vitreous
Transparency:
Transparent, Translucent
Comment:
frosted aggregates
Colour:
Pale yellow to white
Streak:
White
Hardness:
4 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
In the type description, the abstract says good parting {011}. The body says no parting.
Density:
2.19(2) g/cm3 (Measured) 2.071 g/cm3 (Calculated)
Optical Data of Garronite-Na
Type:
Biaxial (+)
RI values:
nα = 1.489(1) nβ = 1.492(1) nγ = 1.496(1)
2V:
Measured: 75° (3), Calculated: 82°
Max. Birefringence:
δ = 0.007
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
Dispersion:
None observed
Pleochroism:
Not Visible
Chemistry of Garronite-Na
Mindat Formula:
Na6(Al6Si10O32) · 8.5H2O
Element Weights:
Crystallography of Garronite-Na
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Cell Parameters:
a = 9.990(2) Å, b = 10.032(2) Å, c = 10.036(2) Å
β = 90.11(3)°, γ = °
β = 90.11(3)°, γ = °
Ratio:
a:b:c = 0.996 : 1 : 1
Unit Cell V:
1,005.80 ų (Calculated from Unit Cell)
Z:
1
Twinning:
Probable microscopic twinning
Comment:
Space Group: I2.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.098 Å | (79) |
| 5.026 Å | (32) |
| 4.101 Å | (77) |
| 3.172 Å | (100) |
| 2.904 Å | (14) |
| 2.685 Å | (64) |
| 1.967 Å | (14) |
| 1.721 Å | (11) |
Reference:
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) |
Type Occurrence of Garronite-Na
General Appearance of Type Material:
Crystal aggregates are botryoidal masses up to 1.5 mm in size. Also as individual, opaque, white, frosted, crude to sharp
pseudo-octahedral crystals up to 2 mm in diameter.
pseudo-octahedral crystals up to 2 mm in diameter.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, Ontario K1P 6P4, catalogue number CMCMC 86893
Geological Setting of Type Material:
In vugs in sodalite syenite
Associated Minerals at Type Locality:
Synonyms of Garronite-Na
Other Language Names for Garronite-Na
Dutch:Garroniet-Na
German:Garronit-Na
Relationship of Garronite-Na to other Species
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.GC. | Gismondine-Sr | Sr4(Si8Al8O32) · 9H2O |
| 9.GC.05 | 'Gismondine-Ba' | Ba2Al4Si4O16 · 4-6H2O |
| 9.GC.05 | Garronite-Ca | Na2Ca5Al12Si20O64 · 27H2O |
| 9.GC.05 | Gismondine-Ca | CaAl2Si2O8 · 4H2O |
| 9.GC.05 | Gobbinsite | Na5(Si11Al5)O32 · 11H2O |
| 9.GC.05 | Amicite | K2Na2Al4Si4O16 · 5H2O |
| 9.GC.10 | Martinandresite | Ba2(Al4Si12O32) · 10H2O |
| 9.GC.10 | Harmotome | Ba2(Si12Al4)O32 · 12H2O |
| 9.GC.10 | Phillipsite-Ca | Ca3(Si10Al6)O32 · 12H2O |
| 9.GC.10 | Phillipsite-K | K6(Si10Al6)O32 · 12H2O |
| 9.GC.10 | Phillipsite-Na | (Na,K,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] · 12H2O |
| 9.GC.10 | Flörkeite | (K3Ca2Na)[Al8Si8O32] · 12H2O |
| 9.GC.15 | Merlinoite | K5Ca2(Si23Al9)O64 · 24H2O |
| 9.GC.20 | Mazzite-Na | Na8[Al4Si14O36]2 · 30H2O |
| 9.GC.20 | Mazzite-Mg | (Mg,K,Ca)5(Si26Al10)O72 · 28H2O |
| 9.GC.25 | Perlialite | K9Na(Ca,Sr)[Al2Si4O12]6 · 15H2O |
| 9.GC.30 | Boggsite | Ca8Na3(Si,Al)96O192 · 70H2O |
| 9.GC.35 | Paulingite-Ca | (Ca,K,Na,Ba, ◻)10 (Si, Al)42O84 · 34H2O |
| 9.GC.35 | Paulingite-K | (K2,Ca,Na2,Ba)5[Al10Si35O90] · 45H2O |
| 9.GC.35 | 'Paulingite-Na' | (Na2,K2,Ca,Ba)5[Al10Si35O90] · 45H2O |
Fluorescence of Garronite-Na
Not fluorescent in either short-wave or long-wave ultraviolet light
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 Garronite-Na
mindat.org URL:
https://www.mindat.org/min-46690.html
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Please feel free to link to this page.
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References for Garronite-Na
Localities for Garronite-Na
Showing 2 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) | |
| Grice et al. (2016) +1 other reference |
Japan | |
| Yutaro Hirahata +2 other references |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada