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Kamiokite

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About KamiokiteHide

Formula:
Fe2Mo3O8
Colour:
Black, grey with olive tint in reflected light
Lustre:
Metallic, Sub-Metallic
Hardness:
Specific Gravity:
5.96
Crystal System:
Hexagonal
Member of:
Name:
Named by D. Picot and Z. Johan in 1977 for the type locality, Kamioka mine, Japan.
Isostructural with:
The iron analogue of iseite and majindeite.


Classification of KamiokiteHide

Approved
Approval Year:
1975
First Published:
1977
4.CB.40

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
7.6.3.1

7 : MULTIPLE OXIDES
6 : (AB)5X8
27.3.13

27 : Sulphites, Chromates, Molybdates and Tungstates
3 : Molybdates

Physical Properties of KamiokiteHide

Metallic, Sub-Metallic
Transparency:
Opaque
Colour:
Black, grey with olive tint in reflected light
Streak:
Black
Hardness:
4½ on Mohs scale
Hardness:
VHN50=600 kg/mm2 (15 s test time) - Vickers
Cleavage:
Perfect
on [0001]
Density:
5.96 g/cm3 (Measured)    6.02 g/cm3 (Calculated)

Optical Data of KamiokiteHide

Type:
Anisotropic
Anisotropism:
Strong - light brownish gray to dark greenish gray
Colour in reflected light:
grey, olive tint
Internal Reflections:
None

Chemical Properties of KamiokiteHide

Formula:
Fe2Mo3O8
IMA Formula:
Fe2+2Mo4+3O8

Crystallography of KamiokiteHide

Crystal System:
Hexagonal
Cell Parameters:
a = 5.77 Å, c = 10.05 Å
Ratio:
a:c = 1 : 1.742
Unit Cell V:
289.77 ų (Calculated from Unit Cell)
Z:
2

Type Occurrence of KamiokiteHide

Place of Conservation of Type Material:
Geology Museum (Geological Survey of Japan)
Geological Setting of Type Material:
Vein in a skarn

Synonyms of KamiokiteHide

Other Language Names for KamiokiteHide

German:Kamiokit
Spanish:Kamiokita

Relationship of Kamiokite to other SpeciesHide

Member of:
Other Members of this group:
IseiteMn2Mo3O8Hex. 6mm : P63mc
MajindeiteMg2Mo3O8Hex. 6mm : P63mc

Common AssociatesHide

Associated Minerals Based on Photo Data:
Molybdenite3 photos of Kamiokite associated with Molybdenite on mindat.org.
Ferrimolybdite2 photos of Kamiokite associated with Ferrimolybdite on mindat.org.
Fluorite2 photos of Kamiokite associated with Fluorite on mindat.org.
Ilsemannite2 photos of Kamiokite associated with Ilsemannite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.CB.05BrizziiteNaSb5+O3Trig. 3 : R3
4.CB.05CorundumAl2O3Trig. 3m (3 2/m) : R3c
4.CB.05Ecandrewsite(Zn,Fe2+,Mn2+)TiO3Trig. 3 : R3
4.CB.05EskolaiteCr2O3Trig.
4.CB.05GeikieliteMgTiO3Trig. 3 : R3
4.CB.05HematiteFe2O3Trig. 3m (3 2/m) : R3c
4.CB.05IlmeniteFe2+TiO3Trig. 3 : R3
4.CB.05KarelianiteV3+2O3Trig.
4.CB.05MelanostibiteMn2+(Sb5+,Fe3+)O3Trig.
4.CB.05PyrophaniteMn2+TiO3Trig. 3 : R3
4.CB.05Akimotoite(Mg,Fe2+)SiO3Trig.
4.CB.05Unnamed (Auroantimonate)AuSbO3
4.CB.05UM1998-11-O-AuHSbAu+2Sb3+O2(OH)
4.CB.05TistariteTi3+2O3Trig. 3m (3 2/m) : R3c
4.CB.10AvicenniteTl2O3Iso. m3 (2/m 3) : Ia3
4.CB.10BixbyiteMn3+2O3Iso. m3 (2/m 3) : Ia3
4.CB.15Armalcolite(Mg,Fe2+)Ti2O5Orth. mmm (2/m 2/m 2/m)
4.CB.15PseudobrookiteFe2TiO5Orth. mmm (2/m 2/m 2/m)
4.CB.20Zincohögbomite-2N2S[(Zn,Al,Fe2+)3(Al,Fe3+,Ti)8O15(OH)]2Hex. 6mm : P63mc
4.CB.20Zincohögbomite-2N6S[(Zn,Mg)7(Al,Fe3+,Ti)16O31(OH)]2Hex. 6mm : P63mc
4.CB.20Magnesiohögbomite-6N6S[(Mg,Fe2+)3(Al,Ti,Fe3+)8O15(OH)]6Trig. 3m (3 2/m) : R3m
4.CB.20Magnesiohögbomite-2N3S[(Mg,Fe2+,Zn)4(Al,Ti,Fe3+)10O19(OH)]2Trig. 3m (3 2/m) : P3 1m
4.CB.20Magnesiohögbomite-2N2S[(Mg,Fe2+)3[Al7(Ti,Fe3+)]O15(OH)]2Hex. 6mm : P63mc
4.CB.20Ferrohögbomite-6N12S[(Fe2+,Mg,Zn)5(Al,Ti,Fe3+)12O23(OH)]6Trig. 3m (3 2/m) : R3m
4.CB.25PseudorutileFe2Ti3O9Hex.
4.CB.25KleberiteFeTi6O11(OH)5Mon. 2/m : P21/b
4.CB.30BerdesinskiiteV3+2TiO5Mon.
4.CB.30OxyvaniteV3+2V4+O5Mon. 2/m : B2/b
4.CB.35Olkhonskite(Cr,V)2Ti3O9Mon.
4.CB.35SchreyeriteV3+2Ti3O9Mon.
4.CB.40Nolanite(V3+,Fe3+,Fe2+,Ti)10O14(OH)2Hex.
4.CB.40RinmaniteZn2Sb2Mg2Fe4O14(OH)2Hex. 6 : P63
4.CB.40IseiteMn2Mo3O8Hex. 6mm : P63mc
4.CB.40MajindeiteMg2Mo3O8Hex. 6mm : P63mc
4.CB.45ClaudetiteAs2O3Mon. 2/m
4.CB.45StibioclaudetiteAsSbO3Mon. 2/m : P21/m
4.CB.50ArsenoliteAs2O3Iso. m3m (4/m 3 2/m) : Fd3m
4.CB.50SenarmontiteSb2O3Iso. m3m (4/m 3 2/m) : Fd3m
4.CB.55ValentiniteSb2O3Orth. mmm (2/m 2/m 2/m) : Pccn
4.CB.60BismiteBi2O3Mon. 2/m : P21/b
4.CB.65SphaerobismoiteBi2O3Tet.
4.CB.70SilléniteBi12SiO20Iso. 2 3 : I2 3
4.CB.75KyzylkumiteV3+Ti2O5(OH)Mon. 2/m : P21/b
4.CB.80TietaiyangiteFe3+4Fe2+TiO9Hex.

Related Minerals - Dana Grouping (8th Ed.)Hide

7.6.3.2IseiteMn2Mo3O8Hex. 6mm : P63mc
7.6.3.3MajindeiteMg2Mo3O8Hex. 6mm : P63mc

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

27.3.1LindgreniteCu3(MoO4)2(OH)2Mon. 2/m : P21/m
27.3.2PowelliteCa(MoO4)Tet. 4/m : I41/a
27.3.3WulfenitePb(MoO4)Tet. 4/m : I41/a
27.3.4KoechliniteBi2MoO6Orth. mm2 : Pna21
27.3.5SedoviteU(MoO4)2Orth.
27.3.6MouriteUMo5O12(OH)10Mon.
27.3.7Iriginite(UO2)Mo2O7 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
27.3.8Umohoite(UO2)MoO4 · 2H2OTric.
27.3.9MoluraniteH4U4+(UO2)3(MoO4)7 · 18H2O
27.3.10CousiniteMgU2Mo2O11 · 6H2O
27.3.11Calcurmolite(Ca,Na)2(UO2)3Mo2(O,OH)11 · nH2O
27.3.12TengchongiteCaO · 6UO3 · 2MoO3 · 12H2OOrth.
27.3.14FerrimolybditeFe2(MoO4)3 · nH2OOrth. mmm (2/m 2/m 2/m) : Pmmn

Other InformationHide

Notes:
Slowly etched by nitric acid, not affected by hydrochloric
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 KamiokiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Picot, D., Johan, Z. (1977) Kamiokite. Atlas des Minéraux Métalliques. Mémoires du Bureau de Recherches Géologiques et Minières: 90-1977: 219-219. (in French)
Dunn, P.J., Grice, J.D., Fleischer, M., Pabst, A. (1983) New mineral names. American Mineralogist: 68: 1038-1041.
Sasaki, A., Yui, S., Yamaguchi, M. (1985) Kamiokite, Fe2Mo3O8, a new mineral. Mineralogical Journal: 12: 393-399.
Kanazawa, Y., Sasaki, A. (1986) Structure of kamiokite. Acta Crystallographica: C42: 9-11.
Hawthorne, F.C., Burke, E.A.J., Ercit, T.S., Grew, E.S., Grice, J.D., Jambor, J.L., Puziewicz, J., Roberts, A.C., Vanko, D.A. (1988) New mineral names. American Mineralogist: 73: 189-199.

Internet Links for KamiokiteHide

Localities for KamiokiteHide

ⓘ - 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.
Brazil
 
  • Pará
Johan, Z., & Picot, P. (1986). Kamiokite, Fe 2 Mo 3 O 8, a tetravalent molybdenum oxide: New data and occurrences. Mineralogy and Petrology, 35(1), 67-75.
China
 
  • Xinjiang Autonomous Region
    • Hami Prefecture (Kumul Prefecture; Qumul Prefecture)
      • Hami Co. (Kumul Co.; Qumul Co.)
Han, C., Xiao, W., Zhao, G., Su, B., Sakyi, P. A., Ao, S., ... & Zhang, Z. (2014). Late Paleozoic metallogenesis and evolution of the East Tianshan Orogenic Belt (NW China, Central Asia Orogenic Belt). Geology of Ore Deposits, 56(6), 493-512.
Czech Republic
 
  • Ústí Region
    • Krušné Hory Mts (Erzgebirge)
      • Krupka (Graupen)
Sejkora, J., Breiter, K.: Historický rudní revír Krupka, Krušné hory. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1999, roč. 7, s. 29-45.
Japan (TL)
 
  • Honshu Island
    • Chubu Region
      • Gifu Prefecture
        • Hida City
          • Kamioka mine
Sasaki, A., Yui, S., Yamaguchi, M. (1985) Kamiokite, Fe2Mo3O8, a new mineral. Mineralogical Journal: 12: 393-399.
Mexico
 
  • Chihuahua
    • Pueblito de Allende
72nd Meteor.Soc. Meeting, Abs. 5090(2009)
USA
 
  • Michigan
    • Keweenaw Co.
      • Ahmeek
American Mineralogist,Volume 68, pages1038-1041 1983
      • Mohawk
American Mineralogist,Volume 68, pages1038-1041 1983
Mineral and/or Locality  
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