Ferrihollandite
A valid IMA mineral species
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About Ferrihollandite
Formula:
Ba(Mn4+6Fe3+2)O16
Colour:
Greyish-black, black
Lustre:
Metallic
Hardness:
4 - 6
Crystal System:
Monoclinic
Member of:
Name:
Named in 2013 by C. Biagioni, C. Capalbo, M. Lezzerini, M. Pasero for being the ferric iron analogue of hollandite.
Type Locality:
Isostructural with:
The Ba-Fe3+ end-member in the Coronadite Group was redefined as ferrihollandite (IMA 11-F; Biagioni et al., 2013).
The original type locality for hollandite is now that of ferrihollandite.
Possibly the Mn analogue of UM2003-09-O:BaFePbTi (assuming similar structure).
The original type locality for hollandite is now that of ferrihollandite.
Possibly the Mn analogue of UM2003-09-O:BaFePbTi (assuming similar structure).
Unique Identifiers
Mindat ID:
43558
Long-form identifier:
mindat:1:1:43558:5
Similar Names
| Ferri-hellandite-(Ce) | A valid IMA mineral species - pending publication | (Ca3Ce)Ce2Fe3+◻2B4Si4O22(OH)2 |
IMA Classification of Ferrihollandite
Approved
IMA status notes:
Renamed by the IMA
First published:
2013
Approval history:
Renamed by IMA: 2011
Classification of Ferrihollandite
4.DK.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
K : With large (+- medium-sized) cations; tunnel structures
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
K : With large (+- medium-sized) cations; tunnel structures
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 |
|---|---|---|
| Fhol | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Fhol | 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 Ferrihollandite
Metallic
Transparency:
Opaque
Colour:
Greyish-black, black
Streak:
Black
Hardness:
4 - 6 on Mohs scale
Comment:
Mohs 6 on the crystal faces and 4 on the striated fracture surfaces.
Chemistry of Ferrihollandite
Mindat Formula:
Ba(Mn4+6Fe3+2)O16
Element Weights:
Elements listed:
Crystallography of Ferrihollandite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 10.0001(7) Å, b = 5.7465(4) Å, c = 9.8076(8) Å
β = 90.713(2)°
β = 90.713(2)°
Ratio:
a:b:c = 1.74 : 1 : 1.707
Unit Cell V:
563.56 ų
Morphology:
Prismatic and usually striated along [010], probably as a consequence of twinning on {101} or {101}, owing to the pseudo-tetragonal symmetry.
Twinning:
Twinning on {101} or {101}.
Comment:
Space group P2/n. Pseudo-tetragonal. Data from Biagioni et al. (2014).
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020150 | Ferrihollandite | Biagioni C, Capalbo C, Lezzerini M, Pasero M (2014) Ferrihollandite, BaMn4+6Fe3+2O16, from Apuan Alps, Tuscany, Italy: description and crystal structure European Journal of Mineralogy 26 171-178 | 2014 | Apuan Alps, Tuscany, Italy | 0 | 293 |
CIF Raw Data - click here to close
Epitaxial Relationships of Ferrihollandite
Epitaxial Minerals:
| 'Rutile' | TiO2 |
Epitaxy Comments:
Rutile with c-axis parallel to the b-axis of ferrihollandite (Biagioni et al. 2014).
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits |
Type Occurrence of Ferrihollandite
General Appearance of Type Material:
Black crystals that look like a tetragonal prism and a flat tetragonal pyramid.
Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
In quartz-veins traversing the manganese-ore deposit.
Associated Minerals at Type Locality:
Other Language Names for Ferrihollandite
Dutch:Ferrihollandiet
German:Ferrihollandit
Relationship of Ferrihollandite to other Species
Member of:
Other Members of Coronadite Group:
| Coronadite | Pb(Mn4+6Mn3+2)O16 | Mon. 2/m |
| Cryptomelane | K(Mn4+7Mn3+)O16 | Mon. 2/m |
| Ferricoronadite | Pb(Mn4+6Fe3+2)O16 | Tet. 4/m : I4/m |
| Hollandite | Ba(Mn4+6Mn3+2)O16 | Mon. 2/m |
| Manjiroite | Na(Mn4+7Mn3+)O16 | Tet. 4/m : I4/m |
| Strontiomelane | Sr(Mn4+6Mn3+2)O16 | Mon. 2/m : P21/b |
| Thalliomelane | Tl(Mn4+7.5Cu2+0.5)O16 | Tet. 4/m : I4/m |
Common Associates
Associations Based on Photo Data:
| 9 photos of Ferrihollandite associated with Fluorite | CaF2 |
| 9 photos of Ferrihollandite associated with Quartz | SiO2 |
| 3 photos of Ferrihollandite associated with Volkonskoite | Ca0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O |
| 2 photos of Ferrihollandite associated with Microcline | K(AlSi3O8) |
Related Minerals - Strunz-mindat Grouping
| 4.DK.K | Thalliomelane | Tl(Mn4+7.5Cu2+0.5)O16 |
| 4.DK. | Kopernikite | K(Ti7Cr3+)O16 |
| 4.DK.4.DK. | Ferricoronadite | Pb(Mn4+6Fe3+2)O16 |
| 4.DK.05a | Manjiroite | Na(Mn4+7Mn3+)O16 |
| 4.DK.05b | Mannardite | Ba(Ti4+6V3+2)O16 |
| 4.DK.05b | Redledgeite | Ba(Ti4+6Cr3+2)O16 |
| 4.DK.05 | Akaganeite | (Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O |
| 4.DK.05a | Coronadite | Pb(Mn4+6Mn3+2)O16 |
| 4.DK.05a | Hollandite | Ba(Mn4+6Mn3+2)O16 |
| 4.DK.05a | Cryptomelane | K(Mn4+7Mn3+)O16 |
| 4.DK.05a | Strontiomelane | Sr(Mn4+6Mn3+2)O16 |
| 4.DK.05b | Henrymeyerite | Ba(Ti4+7Fe2+)O16 |
| 4.DK.05b | Priderite | K(Ti4+7Fe3+)O16 |
| 4.DK.10 | Romanèchite | (Ba,H2O)2(Mn4+,Mn3+)5O10 |
| 4.DK.10 | Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
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 Ferrihollandite
mindat.org URL:
https://www.mindat.org/min-43558.html
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References for Ferrihollandite
Reference List:
Potter, Russell M., Rossman, George R (1979) The tetravalent manganese oxides: identification, hydration, and structural relationships by infrared spectroscopy. American Mineralogist, 64 (11-12) 1199-1218
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2012) New minerals and nomenclature modifications approved in 2012. CNMNC Newsletter No 13. Mineralogical Magazine, 76 (3) 807-817 doi:10.1180/minmag.2012.076.3.26
Localities for Ferrihollandite
Showing 9 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.
France | |
| Georges FAVREAU collection & EDX ... |
India (TL) | |
| Biagioni et al. (2013) |
Italy | |
| Cristian Biagioni +1 other reference |
Russia | |
| webmineral.ru (2020) |
| Pavel M. Kartashov's analytical data |
Sweden | |
| Ödman (1950) +1 other reference |
| Ödman (1950) +2 other references | |
| Sandström (1997) | |
| Ödman (1950) +1 other reference |
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Sörhårås, Ultevis, Jokkmokk, Norrbotten County, Sweden