Delessite
A material that is NOT an approved mineral species
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About Delessite
Formula:
(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Name:
Named by Karl Friedrich Naumann in 1850 in honor of Achille-Joseph Delesse (1817 Metz, France – March 24, 1881 Paris, France), mineralogist and geologist of the Sorbonne University and later, the Ecole des Mines.
Fe-bearing variety of clinochlore (some references also consider it a Mg-rich variety of chamosite).
Unique Identifiers
Mindat ID:
1250
Long-form identifier:
mindat:1:1:1250:4
GUID
(UUID V4):
(UUID V4):
93950f06-a89f-4f53-bbe6-acb76ef672c4
Classification of Delessite
16.19.10
16 : Silicates Containing Aluminum and other Metals
19 : Aluminosilicates of Fe and Mg
16 : Silicates Containing Aluminum and other Metals
19 : Aluminosilicates of Fe and Mg
Chemistry of Delessite
Mindat Formula:
(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Synonyms of Delessite
Other Language Names for Delessite
Common Associates
Associated Minerals Based on Photo Data:
6 photos of Delessite associated with Quartz | SiO2 |
4 photos of Delessite associated with Laumontite | CaAl2Si4O12 · 4H2O |
3 photos of Delessite associated with Harmotome | Ba2(Si12Al4)O32 · 12H2O |
3 photos of Delessite associated with Amethyst | SiO2 |
2 photos of Delessite associated with Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
1 photo of Delessite associated with Goethite | α-Fe3+O(OH) |
1 photo of Delessite associated with Calcite | CaCO3 |
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 Delessite
mindat.org URL:
https://www.mindat.org/min-1250.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for Delessite
Reference List:
Localities for Delessite
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.
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Juchem Quarry, Niederwörresbach, Herrstein-Rhaunen, Birkenfeld, Rhineland-Palatinate, Germany