Ferristilpnomelane
A variety of Stilpnomelane
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About Ferristilpnomelane
Formula:
K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
Colour:
Greenish brown to dark greenish brown or black
Lustre:
Sub-Vitreous, Greasy
Hardness:
3 - 3½
Name:
Informally named in 1951 by Alexander N. Winchell for a slightly ferrian stilpnomelane, but sometimes mistaken as an attempt to rename ferric-dominant stilpnomelane (chalcodite).
Unique Identifiers
Mindat ID:
10587 (as Ferristilpnomelane)
3789 (as Stilpnomelane)
3789 (as Stilpnomelane)
Long-form identifier:
mindat:1:1:10587:9 (as Ferristilpnomelane)
mindat:1:1:3789:7 (as Stilpnomelane)
mindat:1:1:3789:7 (as Stilpnomelane)
GUID
(UUID V4):
(UUID V4):
0b2608ed-ad2d-4d80-a396-dda9e057d5be (as Ferristilpnomelane)
908665b2-7c31-4fb1-8481-ec034d10bd93 (as Stilpnomelane)
908665b2-7c31-4fb1-8481-ec034d10bd93 (as Stilpnomelane)
Physical Properties of Ferristilpnomelane
Sub-Vitreous, Greasy
Transparency:
Transparent, Translucent
Colour:
Greenish brown to dark greenish brown or black
Streak:
Dark greenish brown
Hardness:
3 - 3½ on Mohs scale
Tenacity:
Flexible
Cleavage:
Perfect
{001}
{001}
Fracture:
Micaceous
Chemistry of Ferristilpnomelane
Mindat Formula:
K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
Common Associates
Associated Minerals Based on Photo Data:
7 photos of Ferristilpnomelane associated with Willemite | Zn2SiO4 |
7 photos of Ferristilpnomelane associated with Franklinite | Zn2+Fe3+2O4 |
7 photos of Ferristilpnomelane associated with Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 |
4 photos of Ferristilpnomelane associated with Magnesio-riebeckite | ◻{Na2}{Mg3Fe3+2}(Si8O22)(OH)2 |
4 photos of Ferristilpnomelane associated with Calcite | CaCO3 |
4 photos of Ferristilpnomelane associated with Quartz | SiO2 |
1 photo of Ferristilpnomelane associated with Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
1 photo of Ferristilpnomelane associated with Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
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 Ferristilpnomelane
mindat.org URL:
https://www.mindat.org/min-10587.html
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Please feel free to link to this page.
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References for Ferristilpnomelane
Localities for Ferristilpnomelane
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.
Poland | |
| Lis et al. (1986) |
Tajikistan | |
| V.A. Karpenko data |
USA | |
| Chesterman (1966b) +3 other references |
| Eckel et al. (1997) |
| Dunn (1995) +1 other reference |
Oen (1984) | |
| Mineralogical Record: 15 (4) |
Franklin Mine, Franklin, Sussex County, New Jersey, USA