Muskoxite
A valid IMA mineral species - questionable
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Formula:
Mg7Fe4O13 · 10H2O
Colour:
Dark reddish brown
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
3.10 - 3.20
Crystal System:
Trigonal
Member of:
Name:
For the type locality, the Muskox intrusion, Kitikmeot Region, Nunavut, Canada.
Type Locality:
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.
Unique Identifiers
Mindat ID:
2818
Long-form identifier:
mindat:1:1:2818:5
GUID
(UUID V4):
(UUID V4):
e331fe48-e29d-46c9-b648-26f9031a0139
IMA Classification of Muskoxite
Approved, Questionable
IMA Formula:
Mg7Fe3+4(OH)26 · H2O (?)
First published:
1969
Classification of Muskoxite
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
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 : MULTIPLE OXIDES
11 : Miscellaneous
7.20.12
7 : Oxides and Hydroxides
20 : Oxides of Fe
7 : Oxides and Hydroxides
20 : Oxides of Fe
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Mkx | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Muskoxite
Vitreous
Transparency:
Translucent
Colour:
Dark reddish brown
Streak:
Light orange-brown
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Basal
Basal
Density:
3.10 - 3.20 g/cm3 (Measured)
Optical Data of Muskoxite
Type:
Biaxial (-)
Dispersion:
relatively strong
Pleochroism:
Non-pleochroic
Chemistry of Muskoxite
Mindat Formula:
Mg7Fe4O13 · 10H2O
Elements listed:
Crystallography of Muskoxite
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
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 3b: Earth’s earliest hydrosphere | >4.45 |
13 : Hadean serpentinization | |
Stage 4b: Highly evolved igneous rocks | >3.0 |
37 : Layered igneous intrusions and related PGE minerals |
Type Occurrence of Muskoxite
General Appearance of Type Material:
Veins in drill core
Reference:
Jambor, J.L. (1969) Muskoxite, a new hydrous magnesium - ferric iron oxide from the Muskox Intrusion, Northwest Territories, Canada. American Mineralogist: 54: 684-696.
Synonyms of Muskoxite
Other Language Names for Muskoxite
Relationship of Muskoxite to other Species
Member of:
Other Members of this group:
Akopovaite | Al4Li2(OH)12(CO3)(H2O)3 | Mon. 2/m : B2/m |
Amoraite | Ca12Al6(OH)36(CO3)2(SO3) · 15H2O | Tric. 1 : P1 |
Brugnatellite | Mg6Fe3+(CO3)(OH)13 · 4H2O | Hex. |
Carbocalumite | Ca4Al2(OH)12(CO3) · 6H2O | Trig. 3m (3 2/m) : R3c |
Coalingite | Mg10Fe3+2(OH)24[CO3] · 2H2O | Trig. 3m (3 2/m) : R3m |
Cualstibite Group | M2R(OH)6[Sb5+(OH)6], where M = Zn, Ni, Cu and R = Al or Fe3+ | |
Dritsite | Li2Al4(OH)12Cl2 · 3H2O | Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm |
Fougèrite Group | ||
Glaucocerinite Group | ||
Hydrocalumite Group | ||
Hydrotalcite Group | M6R3+2(OH)16Z · 4H2O, where M=Mg, Fe, Ni, R3+ = Al, Cr, Co or Fe, and Z=CO3, Cl | |
Karchevskyite | Mg18Al9(OH)54Sr2(CO3)9(H2O)6 (H3O)5 | Trig. |
Mampsisite | Ca4Al2(CO3)(OH)12 · 5H2O | Tric. |
Poellmannite | Ca6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O | Trig. 3 : R3 |
Quintinite Group | ||
UM1987-05-OH:AlCMg | Mg4Al2(OH)12(CO3,SO4) · 3H2O | |
Wermlandite Group | M7R3+2(OH)18[Ca(H2O)6][SO4]2 · 6H2O, where = Mg, Fe, Zn and R= Al or Fe | |
Woodwardite Group | May be considered a subgroup of the Hydrotalcite Group. |
Related Minerals - Strunz-mindat Grouping
4.FL. | Trébeurdenite | Fe2+2Fe3+4O2(OH)10CO3 · 3H2O |
4.FL. | Mariakrite | [Ca4Al2(OH)12(H2O)4][Fe2S4] |
4.FL.05 | Woodallite | Mg6Cr2(OH)16Cl2 · 4H2O |
4.FL.05 | Iowaite | Mg6Fe3+2(OH)16Cl2 · 4H2O |
4.FL.05 | Jamborite | Ni2+1-xCo3+x(OH)2-x(SO4)x · nH2O |
4.FL.05 | Meixnerite | Mg6Al2(OH)16(OH)2 · 4H2O |
4.FL.05 | Fougèrite | Fe2+4Fe3+2(OH)12[CO3] · 3H2O |
4.FL.05 | Mössbauerite | Fe3+6O4(OH)8[CO3] · 3H2O |
4.FL.05 | Dritsite | Li2Al4(OH)12Cl2 · 3H2O |
4.FL.10 | Hydrocalumite | Ca4Al2(OH)12(Cl,CO3,OH)2 · 4H2O |
4.FL.15 | Kuzelite | Ca4Al2(OH)12[SO4] · 6H2O |
4.FL.20 | Aurorite | Mn2+Mn4+3O7 · 3H2O |
4.FL.20 | Chalcophanite | ZnMn4+3O7 · 3H2O |
4.FL.20 | Ernienickelite | NiMn3O7 · 3H2O |
4.FL.20 | Jianshuiite | (Mg,Mn,Ca)Mn3O7 · 3H2O |
4.FL.25 | Woodruffite | Zn2+x/2(Mn4+1-xMn3+x)O2 · yH2O |
4.FL.30 | Asbolane | (Ni,Co)2-xMn4+(O,OH)4 · nH2O |
4.FL.30 va | Lampadite | Cu, Mn, O, H |
4.FL.35 | Buserite | Na4Mn14O27 · 21H2O |
4.FL.40 | Ranciéite | (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O |
4.FL.40 | Takanelite | (Mn,Ca)Mn4O9 · H2O |
4.FL.45 | Birnessite | (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O |
4.FL.55 | Cianciulliite | Mn(Mg,Mn)2Zn2(OH)10 · 2-4H2O |
4.FL.60 | Jensenite | Cu3[TeO6] · 2H2O |
4.FL.65 | Leisingite | Cu2MgTe6+O6 · 6H2O |
4.FL.70 | Akdalaite | Al10O14(OH)2 |
4.FL.75 | Cafetite | CaTi2O5 · H2O |
4.FL.80 | Mourite | UMo5O12(OH)10 |
4.FL.85 | Deloryite | Cu4(UO2)(MoO4)2(OH)6 |
4.FL.90 | Lagalyite | Ca2xMn1-xO2 · 1.5-2H2O |
4.FL.95 | Tunnerite (of Cornu) | |
4.FL.100 | Carbocalumite | Ca4Al2(OH)12(CO3) · 6H2O |
4.FL.100 | Mampsisite | Ca4Al2(CO3)(OH)12 · 5H2O |
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 Muskoxite
mindat.org URL:
https://www.mindat.org/min-2818.html
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References for Muskoxite
Reference List:
Jambor, J. L. (1969) Muskoxite, a new hydrous magnesium-ferric iron oxide from the Muskox Intrusion, Northwest Territories, Canada. American Mineralogist, 54 (5-6) 684-696
Localities for Muskoxite
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.
Canada (TL) | |
| Jambor (1969) |