Fahlunite
A material that is NOT an approved mineral species
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About Fahlunite
Formula:
(Mg,Fe)Al2Si3O10 · 2H2O
An alteration product of cordierite (compare also pinite).
Originally described from Falu mine, Falun, Dalarna, Sweden.
Originally described from Falu mine, Falun, Dalarna, Sweden.
Unique Identifiers
Mindat ID:
1438
Long-form identifier:
mindat:1:1:1438:6
GUID
(UUID V4):
(UUID V4):
00d71373-f43f-49d6-8086-86ea64551c3c
Chemistry of Fahlunite
Mindat Formula:
(Mg,Fe)Al2Si3O10 · 2H2O
Synonyms of Fahlunite
Other Language Names for Fahlunite
Common Associates
Associated Minerals Based on Photo Data:
8 photos of Fahlunite associated with Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
5 photos of Fahlunite associated with Quartz | SiO2 |
4 photos of Fahlunite associated with Chrysoberyl | BeAl2O4 |
4 photos of Fahlunite associated with Columbite-(Fe) | Fe2+Nb2O6 |
4 photos of Fahlunite associated with Spessartine | Mn2+3Al2(SiO4)3 |
3 photos of Fahlunite associated with Albite | Na(AlSi3O8) |
3 photos of Fahlunite associated with Smoky Quartz | SiO2 |
3 photos of Fahlunite associated with Cleavelandite | Na(AlSi3O8) |
2 photos of Fahlunite associated with Zircon | Zr(SiO4) |
2 photos of Fahlunite associated with Talc | Mg3Si4O10(OH)2 |
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 Fahlunite
mindat.org URL:
https://www.mindat.org/min-1438.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Fahlunite
Reference List:
Localities for Fahlunite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Austria | |
| Exel (1993) |
Sweden | |
| Hisinger (1815) +1 other reference |
USA | |
| Jim G. Ferguson (1922) |
| Shepard (1841) |
Williams (1899) | |
Shepard (1841) +2 other references | |
| Ted Johnson collection |
| www.pnwfm.org (2006) |
Timms Hill, Haddam, Middlesex County, Connecticut, USA