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Ferrohögbomite-2N2S
A valid IMA mineral species
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About Ferrohögbomite-2N2S
Arvid G. Högbom
Formula:
[(Fe2+,Mg,Zn,Al)3(Al,Ti,Fe3+)8O15(OH)]2
Colour:
Reddish brown to brownish black
Lustre:
Adamantine
Hardness:
6 - 7
Specific Gravity:
4.04 (Calculated)
Crystal System:
Hexagonal
Member of:
Name:
Named for dominant iron and its relation to högbomite. The prefix ferro- reflects that it is a högbomite where the spinel module is dominated by the hercynite component (FeAl2O6). The root is for Arvid Gustaf Högbom (11 January 1857, VÀnnÀs, VÀsterbotten, Sweden - 19 January 1940, Uppsala, Sweden), Professor of Mineralogy and Geology at Uppsala University. The suffix designates the polysome. The numbers refers to the total number of Nolanite (N) and Spinel (S) modules in the crystal structure.
A polysomatic Högbomite Group mineral composed of two nolanite modules (N) and two spinel modules (S) where the spinel modules have ideally hercynite composition.
Name Encoding
Formatted:
ferrohögbomite-2N2S
HTML:
ferrohögbomite-2<i>N</i>2<i>S</i>
LaTeX:
ferrohögbomite-2\textit{N}2\textit{S}
ASCII-7:
Ferrohogbomite-2N2S
Unique Identifiers
Mindat ID:
11114
Long-form identifier:
mindat:1:1:11114:4
Similar Names
| Ferrohögbomite-6N12S | [(Fe2+,Mg,Zn)5(Al,Ti,Fe3+)12O23(OH)]6 |
IMA Classification of Ferrohögbomite-2N2S
Approved
IMA Formula:
(Fe,Mg,Zn,Al)3(Al,Ti,Fe)8O15(OH)
Approval year:
2001
First published:
2002
Classification of Ferrohögbomite-2N2S
4.CB.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Fhög-2N2S | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Ferrohögbomite-2N2S
Adamantine
Transparency:
Translucent
Colour:
Reddish brown to brownish black
Streak:
Light brown to brown
Hardness:
6 - 7 on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Very Good
Distinct after {001}.
Distinct after {001}.
Fracture:
Conchoidal
Density:
4.04 g/cm3 (Calculated)
Optical Data of Ferrohögbomite-2N2S
Type:
Uniaxial (-)
RI values:
nω = 1.85 nε = 1.83
Max. Birefringence:
δ = 0.020
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 ”m thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 ”m thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Pleochroism:
Visible
Comments:
Orange-brown to yellow.
Chemistry of Ferrohögbomite-2N2S
Mindat Formula:
[(Fe2+,Mg,Zn,Al)3(Al,Ti,Fe3+)8O15(OH)]2
Element Weights:
Crystallography of Ferrohögbomite-2N2S
Crystal System:
Hexagonal
Class (H-M):
6mm - Dihexagonal Pyramidal
Space Group:
P63mc
Cell Parameters:
a = 5.712(1) Å, c = 18.317(7) Å
Ratio:
a:c = 1 : 3.207
Unit Cell V:
517.56 Ă
Âł (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.948 Ă | (32) |
| 2.860 Ă | (53) |
| 2.603 Ă | (88) |
| 2.427 Ă | (100) |
| 2.392 Ă | (28) |
| 2.053 Ă | (34) |
| 1.597 Ă | (34) |
| 1.475 Ă | (44) |
| 1.430 Ă | (56) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4a: Earthâs earliest continental crust | >4.4-3.0 |
| 19 : Granitic intrusive rocks | |
| Near-surface Processes | |
| 26 : Hadean detrital minerals | |
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Geological Setting:
Metamorphic environments (T from â€500°C to 730°C).
Type Occurrence of Ferrohögbomite-2N2S
General Appearance of Type Material:
Euhedral grains up to 0.3 mm in size, many with hexagonal contours.
Place of Conservation of Type Material:
Museum of Natural History, Bern, Switzerland.
Geological Setting of Type Material:
An isolated rock of unknown provenance found in the desert.
Associated Minerals at Type Locality:
Synonyms of Ferrohögbomite-2N2S
Other Language Names for Ferrohögbomite-2N2S
Dutch:Ferrohögbomiet-2N2S
German:Ferrohögbomit-2N2S
Russian:ЀДŃŃĐŸŃ
Đ”ĐłĐ±ĐŸĐŒĐžŃ-2N2S
Simplified Chinese:ćŻéé»éééçż
Traditional Chinese:ćŻé”é»éééŠç€Š
Relationship of Ferrohögbomite-2N2S to other Species
Member of:
Other Members of Ferrohögbomite subgroup:
| 'Ferrohögbomite-6N12S' | [(Fe2+,Mg,Zn)5(Al,Ti,Fe3+)12O23(OH)]6 | Trig. 3m(32/m) : R3m |
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 4.CB. | Magnesiohögbomite-6N12S | Mg5Al11TiO23(OH) |
| 4.CB. | Kidodite | BaMg2Fe16O27 |
| 4.CB. | Zhenruite | (MoO3)2 · H2O |
| 4.CB. | Fuyuanite | Mg7Nb6O18(OH)8 |
| 4.CB. | Virgilluethite | MoO3 · H2O |
| 4.CB. | Pengite | (Pb8Sb3+3)ÎŁ11Sb5+9O35 |
| 4.CB.05 | Brizziite | NaSb5+O3 |
| 4.CB.05 | Tistarite | Ti3+2O3 |
| 4.CB.05 | Hematite | Fe2O3 |
| 4.CB.05 | Ecandrewsite | ZnTiO3 |
| 4.CB.05 | Melanostibite | Mn2+2Fe3+Sb5+O6 |
| 4.CB.05 | 'UM1998-11-O-AuHSb' | Au+2Sb3+O2(OH) |
| 4.CB.05 | Karelianite | V3+2O3 |
| 4.CB.05 | Corundum | Al2O3 |
| 4.CB.05 | Eskolaite | Cr2O3 |
| 4.CB.05 | Geikielite | MgTiO3 |
| 4.CB.05 | Akimotoite | MgSiO3 |
| 4.CB.05 | 'Unnamed (Fe-Cr Oxide)' | FeCrO3 |
| 4.CB.05 | 'Auroantimonate' | AuSbO3 |
| 4.CB.05 | Hemleyite | Fe2+SiO3 |
| 4.CB.05 | Ilmenite | Fe2+TiO3 |
| 4.CB.05 | Pyrophanite | Mn2+TiO3 |
| 4.CB.10 | Bixbyite-(Fe) | (Fe,Mn)2O3 |
| 4.CB.10 | Bixbyite-(Mn) | Mn3+2O3 |
| 4.CB.10 | Avicennite | Tl3+2O3 |
| 4.CB.15 | Armalcolite | MgTi4+2O5 |
| 4.CB.15 | Ferropseudobrookite | Fe2+Ti4+2O5 |
| 4.CB.15 | Griffinite | Al2Ti4+O5 |
| 4.CB.15 | Pseudobrookite Group | |
| 4.CB.15 | Sassite | Ti3+2Ti4+O5 |
| 4.CB.15 | Pseudobrookite | Fe3+2Ti4+O5 |
| 4.CB.20 | Zincovelesite-6N6S | Zn3(Fe3+,Mn3+,Al,Ti)8O15(OH) |
| 4.CB.20 | Magnesiohögbomite-2N4S | (Mg8.43Fe2+1.57)Σ=10Al22Ti4+2O46(OH)2 |
| 4.CB.20 | Magnesiobeltrandoite-2N3S | (Mg6Al2)(Al18Fe3+2)O38(OH)2 |
| 4.CB.20 | Zincohögbomite-2N6S | [(Zn,Mg)7(Al,Fe3+,Ti)16O31(OH)]2 |
| 4.CB.20 | Magnesiohögbomite-6N6S | [(Mg,Fe2+)3(Al,Ti,Fe3+)8O15(OH)]6 |
| 4.CB.20 | Magnesiohögbomite-2N3S | [(Mg,Fe2+,Zn)4(Al,Ti,Fe3+)10O19(OH)]2 |
| 4.CB.20 | Magnesiohögbomite-2N2S | [(Mg,Fe2+)3[Al7(Ti,Fe3+)]O15(OH)]2 |
| 4.CB.20 | 'Ferrohögbomite-6N12S' | [(Fe2+,Mg,Zn)5(Al,Ti,Fe3+)12O23(OH)]6 |
| 4.CB.20 | Zincohögbomite-2N2S | [(Zn,Al,Fe2+)3(Al,Fe3+,Ti)8O15(OH)]2 |
| 4.CB.25 | Kleberite | FeTi6O11(OH)5 |
| 4.CB.25 | Pseudorutile | Fe3+2Ti4+3O9 |
| 4.CB.30 | Oxyvanite | V3+2V4+O5 |
| 4.CB.30 | Berdesinskiite | V3+2TiO5 |
| 4.CB.30 | Kaitianite | Ti3+2Ti4+O5 |
| 4.CB.35 | Machiite | Al2Ti3O9 |
| 4.CB.35 | Vestaite | (Ti4+Fe2+)Ti4+3O9 |
| 4.CB.35 | Olkhonskite | (Cr,V)2Ti3O9 |
| 4.CB.35 | Schreyerite | V3+2Ti4+3O9 |
| 4.CB.40 | Zincorinmanite-(Zn) | Zn2Sb2(Fe3+4Zn2)O14(OH)2 |
| 4.CB.40 | Majindeite | Mg2Mo3O8 |
| 4.CB.40 | Almagreraite | CuZnMn4+3O8 |
| 4.CB.40 | Kamiokite | Fe2Mo3O8 |
| 4.CB.40 | Nolanite | V3+8Fe3+2O14(OH)2 |
| 4.CB.40 | Iseite | Mn2Mo3O8 |
| 4.CB.40 | Rinmanite | Zn2Sb2Mg2Fe4O14(OH)2 |
| 4.CB.45 | Stibioclaudetite | AsSbO3 |
| 4.CB.45 | Claudetite | As2O3 |
| 4.CB.50 | Senarmontite | Sb2O3 |
| 4.CB.50 | Arsenolite | As2O3 |
| 4.CB.55 | Valentinite | Sb2O3 |
| 4.CB.60 | Bismite | Bi2O3 |
| 4.CB.65 | Sphaerobismoite | Bi2O3 |
| 4.CB.70 | Sillénite | Bi12SiO20 |
| 4.CB.75 | Kyzylkumite | V3+Ti2O5(OH) |
| 4.CB.80 | 'Tietaiyangite' | Fe3+4Fe2+TiO9 |
| 4.CB.85 | Liuite | FeTiO3 |
| 4.CB.90 | Luogufengite | Fe2O3 |
| 4.CB.95 | Wangdaodeite | FeTiO3 |
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 Ferrohögbomite-2N2S
mindat.org URL:
https://www.mindat.org/min-11114.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 Ferrohögbomite-2N2S
Reference List:
Hejny, Clivia, Gnos, Edwin, Grobety, Bernard, Armbruster, Thomas (2002) Crystal chemistry of the polysome ferrohögbomite-2N2S, a long-known but newly defined mineral species. European Journal of Mineralogy, 14 (5). 957-967 doi:10.1127/0935-1221/2002/0014-0957
Grew, E. S., Rao, A. T., Raju, K. K. V. S., Hejny, C., Moore, J. M., Waters, D. J., Yates, M. G., Shearer, C. K. (2003) Prismatine and ferrohögbomite-2N2S in granulite-facies Fe-oxide lenses in the Eastern Ghats Belt at Venugopalapuram, Vizianagaram district, Andhra Pradesh, India: do such lenses have a tourmaline-enriched lateritic precursor? Mineralogical Magazine, 67 (5). 1081-1098 doi:10.1180/0026461036750144
Localities for Ferrohögbomite-2N2S
Showing 13 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
Algeria (TL) | |
| Hejny et al. (2002) |
Antarctica | |
| Hejny et al. (2002) |
Australia | |
| Wilson (1977) +1 other reference |
Italy | |
| Marchesini et al. (2025) |
Madagascar | |
| Rakotonandrasana et al. (2010) |
| Rakotonandrasana et al. (2010) |
| Rakotonandrasana et al. (2010) | |
| Rakotonandrasana et al. (2010) | |
| Rakotonandrasana et al. (2010) +1 other reference |
| Rakotonandrasana et al. (2010) |
| Rakotonandrasana et al. (2010) | |
Myanmar | |
| Pavel M. Kartashov analytical data |
USA | |
| Petersen et al. (1989) +1 other reference |
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Myan Gyi mine, Thurein-taung, Kyauk-Pyat-That, Mogok Township, Pyin-Oo-Lwin District, Mandalay Region, Myanmar