Banalsite-Stronalsite Series
A solid-solution series between two end-member minerals
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About Banalsite-Stronalsite Series
Series Formula:
Na2BaAl4Si4O16 to Na2SrAl4Si4O16
Unique Identifiers
Mindat ID:
42614
Long-form identifier:
mindat:1:1:42614:3
Chemical Analysis
Oxide wt%:
| 1 | 2 | 3 | |
|---|---|---|---|
| SiO2 | 36.98 % | 36.12 % | 36.52 % |
| Al2O3 | 32.85 % | 32.18 % | 32.54 % |
| Fe2O3* | 0.03 % | 0.04 % | |
| CaO | 0.07 % | 0.01 % | 0.02 % |
| SrO | 11.01 % | 6.55 % | 8.83 % |
| BaO | 7.33 % | 14.40 % | 11.12 % |
| Na2O | 9.60 % | 9.32 % | 9.50 % |
| K2O | 0.03 % | 0.02 % | 0.01 % |
| -O=(F+Cl) | -0.00 % | -0.00 % | -0.00 % |
| Total: | 97.9 % | 98.64 % | 98.54 % |
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Na1.97Ca0.01)(Sr0.67Ba0.30)[Al4.10Si3.90O16] |
| 2 | Na1.95(Ba0.61Sr0.41)[Al4.10Si3.90O16] |
| 3 | Na1.97(Sr0.55Ba0.47)[Al4.10Si3.90O16] |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Sayano-Shushenskaya dam, Khakassia, Russia | Frank K. Mazdab Collectionsample FKM-416; https://www.rockptx.com/fkm-401-to-fkm-425/#FKM-416 | Occurs in what appear to be sparse late veinlets cutting massive jadeite-omphacite rock. Patchy zoned from stronalsite with up to 0.67 Sr apfu (this analysis) to banalsite with up to 0.61 Ba apfu. *Fe measured as Fe2+; Fe3+ and Fe2O3 are derived by charge balance. |
| 2 | " " | Frank K. Mazdab Collectionsample FKM-416; https://www.rockptx.com/fkm-401-to-fkm-425/#FKM-416 | Occurs in what appear to be sparse late veinlets cutting massive jadeite-omphacite rock. Patchy zoned from stronalsite with up to 0.67 Sr apfu to banalsite with up to 0.61 Ba apfu (this analysis). *Fe measured as Fe2+; Fe3+ and Fe2O3 are derived by charge balance. |
| 3 | " " | Frank K. Mazdab Collectionsample FKM-416; https://www.rockptx.com/fkm-401-to-fkm-425/#FKM-416 | Occurs in what appear to be sparse late veinlets cutting massive jadeite-omphacite rock. Patchy zoned from stronalsite with up to 0.67 Sr apfu to banalsite with up to 0.61 Ba apfu. This composition represents the dominant material that appears present. *Fe measured as Fe2+; Fe3+ and Fe2O3 are derived by charge balance. |
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 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 |
| 0006095 | Banalsite | 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 | Langban, Sweden | 0 | 293 |
| 0006094 | Banalsite | 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 | Benallt mine, Wales | 0 | 293 |
| 0010759 | Banalsite | Takeuchi Y, Kudoh Y, Haga N (1973) The interpretation of partial Patterson functions and its application to structure analyses of serandite Mn2NaHSi3O9 and banalsite BaNa2Al4Si4O16 Zeitschrift fur Kristallographie 138 313-336 | | 1973 | 0 | 293 |
CIF Raw Data - click here to close
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 Banalsite-Stronalsite Series
mindat.org URL:
https://www.mindat.org/min-42614.html
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References for Banalsite-Stronalsite Series
Reference List:
Frank K. Mazdab Collectionsample FKM-416; https://www.rockptx.com/fkm-401-to-fkm-425/#FKM-416
Localities for Banalsite-Stronalsite Series
Showing 48 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.
Benallt Mine, Rhiw, Aberdaron, Gwynedd, Wales, UK