Brammallite
A variety of Paragonite
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About Brammallite
Formula:
NaAl2(AlSi3O10)(OH)2
Lustre:
Earthy
Name:
Named in honor of Alfred Brammall (1879-1954), British geologist and mineralogist.
First Recorded Locality:
A sodium-deficient variety of paragonite, an analogue of illite. May be derived sometimes from the Na-leaching of paragonite, or by alteration of muscovite or other aluminous minerals.
Unique Identifiers
Mindat ID:
816 (as Brammallite)
3090 (as Paragonite)
3090 (as Paragonite)
Long-form identifier:
mindat:1:1:816:9 (as Brammallite)
mindat:1:1:3090:4 (as Paragonite)
mindat:1:1:3090:4 (as Paragonite)
Similar Names
| Bromellite | A valid IMA mineral species - grandfathered | BeO |
IMA Classification of Brammallite
Questionable
Classification of Brammallite
16.2.11
16 : Silicates Containing Aluminum and other Metals
2 : Aluminosilicates of Na
16 : Silicates Containing Aluminum and other Metals
2 : Aluminosilicates of Na
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 |
|---|---|---|
| Bml | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Bml | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30 |
Physical Properties of Brammallite
Earthy
Chemistry of Brammallite
Mindat Formula:
NaAl2(AlSi3O10)(OH)2
Element Weights:
First Recorded Occurrence of Brammallite
Synonyms of Brammallite
Hydromica (in part)
Other Language Names for Brammallite
German:Brammallit
Spanish:Brammallita
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 Brammallite
mindat.org URL:
https://www.mindat.org/min-816.html
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Please feel free to link to this page.
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References for Brammallite
Reference List:
Bannister, F. A. (1943) Brammallite (sodium-illite), a new mineral from Llandebie, South Wales. Mineralogical Magazine and Journal of the Mineralogical Society, 26 (180) 304-307 doi:10.1180/minmag.1943.026.180.04
Rieder, M., Cavazzini, G., D’Yakonov, Y.S., Frank-Kamenetskii, V.A., Gottardt, G., Guggenheim, S., Koval, P.V., Muller, G., Neiva, A.M.R., Radoslovich, E.W., Robert, J.L., Sassi, F.P., Takeda, H., Weiss, Z., Wones, D.R. (1998) Nomenclature of the micas. The Canadian Mineralogist, 36 (3) 905-912
Rieder, M., Cavazzini, G., D’yakonov, Yu. S., Frank-Kamenetskii, V. A., Gottardi, G., Guggenheim, S., Koval’, P. V., Müller, G., Neiva, A. M. R., Radoslovich, E. W., Robert, J.-L., Sassi, F. P., Takeda, H., Weiss, Z., Wones, D. R. (1999) Nomenclature of the micas. Mineralogical Magazine, 63 (2) 267-279 doi:10.1180/minmag.1999.063.2.13
Localities for Brammallite
Showing 5 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.
Poland | |
| Uzarowic et al. (2012) |
Slovakia | |
| Koděra (1986) |
UK (FRL) | |
| DAN Earth Sci. 208 (1973) +1 other reference |
| |
USA | |
| Dietel et al. (2015) |
Ione Clays Mine, Clarksona, Irish Hill Mining District, Amador County, California, USA