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Stronalsite
A valid IMA mineral species
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About Stronalsite
Formula:
Na2SrAl4Si4O16
Colour:
White
Lustre:
Vitreous
Hardness:
6½
Specific Gravity:
2.95
Crystal System:
Orthorhombic
Name:
The name reflects its composition: a strontium, sodium (latin "natrium"), aluminium silicate.
Forms a solid-solution series with banalsite (see banalsite-stronalsite series for examples of zoned specimens spanning the composition range).
Unique Identifiers
Mindat ID:
3804
Long-form identifier:
mindat:1:1:3804:7
Similar Names
| Stronalite | A rock subtype |
IMA Classification of Stronalsite
Approved
Approval year:
1983
First published:
1987
Classification of Stronalsite
9.FA.60
9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
76.1.6.2
76 : TECTOSILICATES Al-Si Framework
1 : Al-Si Framework with Al-Si frameworks
76 : TECTOSILICATES Al-Si Framework
1 : Al-Si Framework with Al-Si frameworks
16.12.1
16 : Silicates Containing Aluminum and other Metals
12 : Aluminosilicates of Sr, Ba and Zn
16 : Silicates Containing Aluminum and other Metals
12 : Aluminosilicates of Sr, Ba and Zn
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Sns | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Sns | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Stronalsite
Vitreous
Transparency:
Translucent
Colour:
White
Streak:
White
Hardness:
6½ on Mohs scale
Cleavage:
None Observed
Parting:
Rectangular
Density:
2.95 g/cm3 (Measured) 2.95 g/cm3 (Calculated)
Optical Data of Stronalsite
Type:
Biaxial (+)
RI values:
nα = 1.563(2) nβ = 1.564 nγ = 1.574(2)
2V:
Measured: 32° , Calculated: 36°
Max. Birefringence:
δ = 0.011
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 (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
strong
Chemistry of Stronalsite
Mindat Formula:
Na2SrAl4Si4O16
Element Weights:
Common Impurities:
Ba,Ca,Sr
Crystallography of Stronalsite
Crystal System:
Orthorhombic
Cell Parameters:
a = 8.415(4) Å, b = 9.901(4) Å, c = 16.729(9) Å
Ratio:
a:b:c = 0.85 : 1 : 1.69
Unit Cell V:
1,393.81 ų (Calculated from Unit Cell)
Z:
4
Comment:
Point Group: 2/m 2/m 2/m or mm2; Space Group: Ibam or Iba2
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0006093 | Stronalsite | Liferovich R P, Locock A J, Mitchell R H, Shpachenko A K (2006) The crystal structure of stronalsite and a redetermination of the structure of banalsite The Canadian Mineralogist 44 533-546 |  | 2006 | Khibina peralkaline complex, Kola alkaline province, Russia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.204 Å | (100) |
| 3.502 Å | (80) |
| 2.881 Å | (70) |
| 3.183 Å | (50) |
| 2.067 Å | (50) |
| 3.765 Å | (40) |
| 3.069 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| High-? alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks | |
| 36 : Carbonatites, kimberlites, and related igneous rocks |
Type Occurrence of Stronalsite
General Appearance of Type Material:
Aggregates of anhedral crystals reaching 1 mm across.
Place of Conservation of Type Material:
National Science Museum, Tokyo, Japan.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 160484.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 160484.
Geological Setting of Type Material:
Veinlets in xenoliths in serpentine.
Associated Minerals at Type Locality:
Synonyms of Stronalsite
Other Language Names for Stronalsite
Relationship of Stronalsite to other Species
Forms a series with:
Common Associates
Associations Based on Photo Data:
| 4 photos of Stronalsite associated with Jadeite | Na(Al,Fe3+)Si2O6 |
| 2 photos of Stronalsite associated with Slawsonite | Sr(Al2Si2O8) |
| 2 photos of Stronalsite associated with Trinepheline | NaAlSiO4 |
| 2 photos of Stronalsite associated with Fabrièsite | Na3Al3Si3O12 · 2H2O |
| 2 photos of Stronalsite associated with 'Chromojadeite' | Na(Al,Cr)Si2O6 |
| 2 photos of Stronalsite associated with Nepheline | Na3K(Al4Si4O16) |
| 2 photos of Stronalsite associated with Banalsite | Na2BaAl4Si4O16 |
| 2 photos of Stronalsite associated with Albite | Na(AlSi3O8) |
| 2 photos of Stronalsite associated with Natrolite | Na2Al2Si3O10 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 9.FA. | Bonaccorsiite | KK2Na3(Al6Si36)O84 |
| 9.FA. | Hexacelsian | BaAl2Si2O8 |
| 9.FA. | Wodegongjieite | KCa3(Al7Si9)O32 |
| 9.FA.05 | Panunzite | (K,Na)AlSiO4 |
| 9.FA.05 | Yoshiokaite | (Ca,Na)[Al(Al,Si)O4] |
| 9.FA.05 | Nepheline | Na3K(Al4Si4O16) |
| 9.FA.05 | Trinepheline | NaAlSiO4 |
| 9.FA.05 | Davidsmithite | (Ca,◻)2Na6Al8Si8O32 |
| 9.FA.05 | Kaliophilite | KAlSiO4 |
| 9.FA.05 | Kalsilite | KAlSiO4 |
| 9.FA.05 | 'Carnegieite' | NaAlSiO4 |
| 9.FA.05 | Megakalsilite | KAlSiO4 |
| 9.FA.05 | Trikalsilite | K2NaAl3(SiO4)3 |
| 9.FA.10 | Malinkoite | NaBSiO4 |
| 9.FA.15 | Virgilite | LiAlSi2O6 |
| 9.FA.25 | Lisitsynite | KBSi2O6 |
| 9.FA.30 | Ferrisanidine | K[Fe3+Si3O8] |
| 9.FA.30 | Buddingtonite | (NH4)(AlSi3O8) |
| 9.FA.30 | Rubicline | Rb(AlSi3O8) |
| 9.FA.30 | 'Monalbite' | NaAlSi3O8 |
| 9.FA.30 | Microcline | K(AlSi3O8) |
| 9.FA.30 va | 'Germanate-celsian' | BaAl2Ge2O8 |
| 9.FA.30 | Celsian | Ba(Al2Si2O8) |
| 9.FA.30 | Sanidine | K(AlSi3O8) |
| 9.FA.30 | Orthoclase | K(AlSi3O8) |
| 9.FA.35 | Reedmergnerite | NaBSi3O8 |
| 9.FA.35 | Albite | Na(AlSi3O8) |
| 9.FA.35 | Anorthite | Ca(Al2Si2O8) |
| 9.FA.40 | Paracelsian | Ba(Al2Si2O8) |
| 9.FA.45 | Svyatoslavite | Ca(Al2Si2O8) |
| 9.FA.45 | Kumdykolite | Na(AlSi3O8) |
| 9.FA.50 | Slawsonite | Sr(Al2Si2O8) |
| 9.FA.55 | Lisetite | CaNa2Al4Si4O16 |
| 9.FA.60 | Banalsite | Na2BaAl4Si4O16 |
| 9.FA.65 | Maleevite | BaB2Si2O8 |
| 9.FA.65 | Pekovite | SrB2Si2O8 |
| 9.FA.65 | Danburite | CaB2Si2O8 |
| 9.FA.70 | Liebermannite | KAlSi3O8 |
| 9.FA.70 | Lingunite | NaAlSi3O8 |
| 9.FA.70 | Stöfflerite | CaAl2Si2O8 |
| 9.FA.75 | Pfaffenbergite | KNa3(Al4Si12)O32 |
| 9.FA.75 | Kokchetavite | K(AlSi3O8) |
Fluorescence of Stronalsite
None
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 Stronalsite
mindat.org URL:
https://www.mindat.org/min-3804.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Stronalsite
Reference List:
Hori, Hidemichi, Nakai, Izumi, Nagashima, Kozo, Matsubara, Satoshi, Kato, Akira (1987) Stronalsite, SrNa2Al4Si4O16, a new mineral from Rendai, Kochi city, Japan. Mineralogical Journal, 13 (6) 368-375 doi:10.2465/minerj.13.368
Hori, Hidemichi, Nakai, Izumi, Nagashima, Kozo, Matsubara, Satoshi, Kato, Akira (1987) Stronalsite, SrNa2Al4Si4O16, a new mineral from Rendai, Kochi city, Japan. Mineralogical Journal, 13 (6) 368-375 doi:10.2465/minerj.13.368
Hawthorne, Frank C., Burke, Ernst A. J., Ercit, T. Scott, Grew, Edward S., Grice, Joel D., Jambor, John L., Puziewicz, Jacek, Roberts, Andrew C., Vanko, David A. (1988) New Mineral Names. American Mineralogist, 73 (1-2) 189-199
Localities for Stronalsite
Showing 19 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 | |
| Liferovich et al. (2006) |
Czech Republic | |
| Matýsek et al. (2025) |
Finland | |
| Mutanen |
Japan (TL) | |
| Matsubara (1985) +1 other reference |
| Miyajima +2 other references |
| Mineralogical Journal Vol. 13 (1986) +1 other reference |
Myanmar | |
| Ferraris et al. (2014) |
Norway | |
| e-rocks.com (n.d.) |
| Bøe (2000) +1 other reference |
Russia | |
| Doroshkevich et al. (2012) |
| Савельева et al. (2021) |
| Pavel M. Kartashov (n.d.) +1 other reference | |
| Menshikov et al. (2015) |
| ... | |
| Liferovich et al. (2006) |
| Liferovich et al. (2006) |
South Africa | |
| Mitchell et al. (2004) +2 other references |
Spain | |
| Ahijado et al. (2005) |
| Groznova M.V. (2001) |
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Mt Ohsa, Niimi City, Okayama Prefecture, Japan