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Muskoxite

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Formula:
Mg7Fe4O13 · 10H2O
Colour:
Dark reddish brown
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
3.10 - 3.20
Crystal System:
Trigonal
Name:
For the type locality, the Muskox intrusion, Kitikmeot Region, Nunavut, Canada.
As part of the recent re-evaluation of the nomenclature of the hydrotalcite supergroup (Mills et al., 2012), muscoxite was identified as a questionable species which needs further investigation. The range of composition currently ascribed to muskoxite may represent more than one species.


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Classification of MuskoxiteHide

Approved, Questionable
First Published:
2012
4.FL.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
7.11.1.1

7 : MULTIPLE OXIDES
11 : Miscellaneous
7.20.12

7 : Oxides and Hydroxides
20 : Oxides of Fe

Physical Properties of MuskoxiteHide

Vitreous
Transparency:
Translucent
Colour:
Dark reddish brown
Streak:
Light orange-brown
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
Basal
Density:
3.10 - 3.20 g/cm3 (Measured)    

Optical Data of MuskoxiteHide

Type:
Biaxial (-)
Dispersion:
relatively strong
Pleochroism:
Non-pleochroic

Chemical Properties of MuskoxiteHide

Formula:
Mg7Fe4O13 · 10H2O
IMA Formula:
Mg7Fe3+4(OH)26 · H2O

Crystallography of MuskoxiteHide

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Cell Parameters:
a = 3.07 Å, c = 4.6 Å
Ratio:
a:c = 1 : 1.498
Unit Cell V:
37.55 ų (Calculated from Unit Cell)
Morphology:
Paper thin hexagons, trigonal equant grains.
Comment:
Pseudo cell - actual cell believed to be larger

Type Occurrence of MuskoxiteHide

General Appearance of Type Material:
Veins in drill core

Synonyms of MuskoxiteHide

Other Language Names for MuskoxiteHide

German:Muskoxit
Spanish:Muskoxita

Relationship of Muskoxite to other SpeciesHide

Other Members of this group:
BrugnatelliteMg6Fe3+(CO3)(OH)13 · 4H2OHex.
CoalingiteMg10Fe3+2(OH)24[CO3] · 2H2OTrig.
Cualstibite GroupA group within the Hydrotalcite supergroup characterized by (M2+,M3+)(OH)2 brucite-type sheets, in which M2+ ...
Fougèrite Group
Glaucocerinite Group
Hydrocalumite Group
Hydrotalcite GroupMg6R3+2(OH)16CO3·4H2O, where R3+ = Al, Cr, or Fe
Quintinite Group
UM1987-05-OH:AlCMgMg4Al2(OH)12(CO3,SO4)•3H2O
Wermlandite Group
Woodwardite GroupMay be considered a subgroup of the Hydrotalcite Group.

Related Minerals - Nickel-Strunz GroupingHide

4.FL.TrébeurdeniteFe2+2Fe3+4O2(OH)10CO3·3H2OTrig. 3m (3 2/m) : R3m
4.FL.05WoodalliteMg6Cr2(OH)16Cl2 · 4H2OTrig.
4.FL.05IowaiteMg6Fe3+2(OH)16Cl2 · 4H2OTrig. 3m (3 2/m) : R3m
4.FL.05JamboriteNi2+1-xCo3+x(OH)2-x(SO4)x · nH2OTrig. 3m (3 2/m) : R3m
4.FL.05MeixneriteMg6Al2(OH)16(OH)2 · 4H2OTrig. 3m (3 2/m) : R3m
4.FL.05FougèriteFe2+4Fe3+2(OH)12[CO3]·3H2OTrig. 3m (3 2/m) : R3m
4.FL.10HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2OMon. 2 : P21
4.FL.15KuzeliteCa4Al2(OH)12[SO4] · 6H2OTrig.
4.FL.20Aurorite(Mn2+,Ag,Ca)Mn4+3O7 · 3H2OTrig. 3 : R3
4.FL.20Chalcophanite(Zn,Fe,Mn)Mn3O7 · 3H2OTrig. 3 : R3
4.FL.20ErnienickeliteNiMn3O7 · 3H2OTrig. 3 : R3
4.FL.20Jianshuiite(Mg,Mn,Ca)Mn3O7 · 3H2OTrig. 3 : R3
4.FL.25WoodruffiteZn2+x/2(Mn4+1-xMn3+x)O2·yH2OMon. 2/m : B2/m
4.FL.30Asbolane(Ni,Co)2-xMn4+(O,OH)4 · nH2OHex.
4.FL.35BuseriteNa4Mn14O27 · 21H2O
4.FL.40Ranciéite(Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2OTrig. 3 : P3
4.FL.40Takanelite(Mn,Ca)Mn4O9 · H2OHex.
4.FL.45Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2OMon. 2/m : B2/m
4.FL.55CianciulliiteMn(Mg,Mn)2Zn2(OH)10 · 2-4H2OMon. 2/m : B2/m
4.FL.60JenseniteCu3[TeO6] · 2H2OMon. 2/m : P21/m
4.FL.65LeisingiteCuMg2Te6+O6 · 6H2OTrig. 3 : P3
4.FL.70Akdalaite5Al2O3 · H2OHex.
4.FL.75CafetiteCaTi2O5 · H2OMon. 2/m : P21/b
4.FL.80MouriteUMo5O12(OH)10Mon.
4.FL.85DeloryiteCu4(UO2)(MoO4)2(OH)6Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.20.1WüstiteFeOIso. m3m (4/m 3 2/m) : Fm3m
7.20.2MagnetiteFe2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.20.3MaghemiteFe3+2O3Iso. 4 3 2 : P41 3 2
7.20.4HematiteFe2O3Trig. 3m (3 2/m) : R3c
7.20.5Goethiteα-Fe3+O(OH)Orth. mmm (2/m 2/m 2/m)
7.20.6Akaganeite(Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2OMon. 2/m
7.20.7FeroxyhyteFe3+O(OH)Hex.
7.20.8Lepidocrociteγ-Fe3+O(OH)Orth. mm2 : Cmc21
7.20.9FerrihydriteFe3+10O14(OH)2Trig.
7.20.10Amakinite(Fe2+,Mg)(OH)2Trig.
7.20.11MagnesioferriteMgFe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.20.13SrebrodolskiteCa2Fe3+2O5Orth. mmm (2/m 2/m 2/m) : Pnma
7.20.14HercyniteFe2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.20.15BrownmilleriteCa2(Al,Fe3+)2O5Orth. mm2

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for MuskoxiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
JAMBOR, J.L. (1969): Muskoxite, a new hydrous magnesium - ferric iron oxide from the Muskox Intrusion, Northwest Territories, Canada. American Mineralogist 54, 684-696.
Mills, S.J., Christy, A.G., Genin, J.-M.R., Kameda, T., Colombo, F. (2012): Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine, 76, 1289-1336.

Internet Links for MuskoxiteHide

Localities for MuskoxiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada (TL)
 
  • Nunavut
    • Coppermine River area
JAMBOR, J.L. (1969): Muskoxite, a new hydrous magnesium - ferric iron oxide from the Muskox Intrusion, Northwest Territories, Canada. American Mineralogist 54, 684-696.
Mineral and/or Locality  
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