Ferrisepiolite
A valid IMA mineral species
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About Ferrisepiolite
Formula:
(Fe3+,Fe2+,Mg)4((Si,Fe3+)6O15)(O,OH)2 · 6H2O
Colour:
Brown to red-brown
Lustre:
Earthy
Hardness:
2 - 2½
Specific Gravity:
2.51 - 2.69
Crystal System:
Orthorhombic
Member of:
Name:
For Fe(III) (ferric iron) being the dominant cation and its relationship to sepiolite.
Unique Identifiers
Mindat ID:
41139
Long-form identifier:
mindat:1:1:41139:0
GUID
(UUID V4):
(UUID V4):
e3abefe7-0a40-438e-ba9b-158af321148e
IMA Classification of Ferrisepiolite
Approved
IMA Formula:
(Fe3+,Fe2+,Mg)4[(Si,Fe3+)6O15](O,OH)2 · 6H2O
Approval year:
2010
First published:
2013
Type description reference:
Xiangping, Gu, Xiande, Xie, Xiangbin, Wu, Guchang, Zhu, Jianqing, Lai, Kenich, Hoshino, Jiwu, Huang (2013) Ferrisepiolite: a new mineral from Saishitang copper skarn deposit in Xinghai County, Qinghai Province, China. European Journal of Mineralogy, 25 (2) 177-186 doi:10.1127/0935-1221/2013/0025-2262
Classification of Ferrisepiolite
9.00.
9 : SILICATES (Germanates)
0 :
0 :
9 : SILICATES (Germanates)
0 :
0 :
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 |
---|---|---|
Fsep | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Fsep | 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 Ferrisepiolite
Earthy
Colour:
Brown to red-brown
Streak:
Brown-white
Hardness:
2 - 2½ on Mohs scale
Density:
2.51 - 2.69 g/cm3 (Measured)
Chemistry of Ferrisepiolite
Mindat Formula:
(Fe3+,Fe2+,Mg)4((Si,Fe3+)6O15)(O,OH)2 · 6H2O
Crystallography of Ferrisepiolite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 13.467(16) Å, b = 26.953(41) Å, c = 5.226(17) Å
Ratio:
a:b:c = 0.5 : 1 : 0.194
Unit Cell V:
1,896.91 ų (Calculated from Unit Cell)
Comment:
Space group Pncn.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
12.034 Å | (100) |
4.468 Å | (5) |
3.742 Å | (6) |
3.378 Å | (31) |
3.184 Å | (4) |
2.704 Å | (6) |
2.552 Å | (5) |
2.060 Å | (4) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] |
Type Occurrence of Ferrisepiolite
General Appearance of Type Material:
Brown earthy and fibrous aggregates with an appearance of wood bark, consisting of fibrous crystals several micrometers wide and several centimeters long. Also as brown earthy mass consisting of individual grains of flaky-acicular microlites with poor crystallinity, a few micrometers or less in size.
Place of Conservation of Type Material:
Geological Museum of China with catalog number M11786.
Geological Setting of Type Material:
Late-stage veinlets in copper-sulphide ores hosted in layered hedenbergite-andradite-actinolite skarn. Highly oxidizing environment from low-temperature Fe-rich fluids and crystallized in cavities and fractures within the skarn-ore deposit.
Associated Minerals at Type Locality:
Reference:
Gu, X., Xie, X., Wu, X., Zhu, G., Lai, J., Hoshino, K., Huang, J. (2013) Ferrisepiolite: a new mineral from Saishitang copper skarn deposit in Xinghai County, Qinghai Province, China. European Journal of Mineralogy: 25(2): 177–186.
Synonyms of Ferrisepiolite
Other Language Names for Ferrisepiolite
German:Ferrisepiolith
Simplified Chinese:铁海泡石
Relationship of Ferrisepiolite to other Species
Member of:
Other Members of this group:
Falcondoite | (Ni,Mg)4Si6O15(OH)2 · 6H2O | Orth. |
Loughlinite | Na2Mg3Si6O16 · 8H2O | Orth. mmm (2/m 2/m 2/m) |
Sepiolite | Mg4(Si6O15)(OH)2 · 6H2O | Orth. mmm (2/m 2/m 2/m) : Pnna |
Related Minerals - Strunz-mindat Grouping
9.00. | Clino-ferri-holmquistite | ◻{Li2}{Mg3Fe3+2}(Si8O22)(OH)2 |
9.00. | Shkatulkalita | |
9.00. | Alflarsenite | NaCa2Be3Si4O13(OH) · 2H2O |
9.00. | Yegorovite | Na4[Si4O8(OH)4] · 7H2O |
9.00. | Ferroericssonite | BaFe2+2 Fe3+(Si2O7)O(OH) |
9.00. | Zvyaginite | NaZnNb2Ti[Si2O7]20(OH,F)3(H2O)4 + (x < 1) |
9.00. | Burnettite | CaVAlSiO6 |
9.00. | Mendigite | Mn2Mn2MnCa(Si3O9)2 |
9.00. | Bridgmanite Subgroup | ABSiO3 |
9.00.20 | Rinkite-(Ce) | (Ca3Ce)Na(NaCa)Ti(Si2O7)2(OF)F2 |
Other Information
Magnetism:
Non-Magnetic
Notes:
Does not dissolve in dilute hydrochloric acid.
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 Ferrisepiolite
mindat.org URL:
https://www.mindat.org/min-41139.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Ferrisepiolite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2011) New minerals and nomenclature modifications approved in 2010, CNMNC Newsletter No 7. Mineralogical Magazine, 75 (1) 27-31 doi:10.1180/minmag.2011.075.1.27
Xiangping, Gu, Xiande, Xie, Xiangbin, Wu, Guchang, Zhu, Jianqing, Lai, Kenich, Hoshino, Jiwu, Huang (2013) Ferrisepiolite: a new mineral from Saishitang copper skarn deposit in Xinghai County, Qinghai Province, China. European Journal of Mineralogy, 25 (2) 177-186 doi:10.1127/0935-1221/2013/0025-2262
Localities for Ferrisepiolite
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.
Belarus | |
| Levitskiy et al. (2018, July) |
China | |
| Qingchang Meng (1981) |
| Williams et al. (2011) +1 other reference |
Italy | |
| Imma Punzo find & collection |
Russia | |
| Pavel.M. Kartashov (n.d.) |
Nikita Chukanov analytical data | |
Slovakia | |
| Ďuďa et al. (1993) |
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Selsurt Mountain, Lovozersky District, Murmansk Oblast, Russia