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Kamiokite

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Formula:
Fe2Mo3O8
System:
Hexagonal
Colour:
Black, grey with olive ...
Lustre:
Metallic, Sub-Metallic
Hardness:
Member of:
Name:
Named after its type locality mine.
Isostructural with:
The iron analogue of iseite and majindeite.

Classification of Kamiokite

Approved
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
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First Recorded Occurrence of Kamiokite

Place of Conservation of First Recorded Material:
Geology Museum (Geological Survey of Japan)
Year of Discovery:
1975
Geological Setting of First Recorded Material:
Vein in a skarn

Physical Properties of Kamiokite

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

Crystallography of Kamiokite

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

Optical Data of Kamiokite

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

Chemical Properties of Kamiokite

Formula:
Fe2Mo3O8
Essential elements:
All elements listed in formula:

Relationship of Kamiokite to other Species

Member of:
Other Members of Group:
IseiteMn2Mo3O8
MajindeiteMg2Mo3O8
4.CB.05BrizziiteNaSb5+O3
4.CB.05CorundumAl2O3
4.CB.05Ecandrewsite(Zn,Fe2+,Mn2+)TiO3
4.CB.05EskolaiteCr2O3
4.CB.05GeikieliteMgTiO3
4.CB.05HematiteFe2O3
4.CB.05IlmeniteFe2+TiO3
4.CB.05KarelianiteV23+O3
4.CB.05MelanostibiteMn2+(Sb5+,Fe3+)O3
4.CB.05PyrophaniteMn2+TiO3
4.CB.05Akimotoite(Mg,Fe2+)SiO3
4.CB.05AuroantimonateAuSbO3
4.CB.05Romanite(◻,Pb,Ca)UFe22+(Ti,Fe3+)6Ti12O38
4.CB.05UM1998-11-O-AuHSbAu2+Sb3+O2(OH)
4.CB.05TistariteTi23+O3
4.CB.10AvicenniteTl2O3
4.CB.10BixbyiteMn23+O3
4.CB.15Armalcolite(Mg,Fe2+)Ti2O5
4.CB.15PseudobrookiteFe2TiO5
4.CB.20Zincohögbomite-2N2S[(Zn,Al,Fe2+)3(Al,Fe3+,Ti)8O15(OH)]2
4.CB.20Zincohögbomite-2N6S[(Zn,Mg)7(Al,Fe3+,Ti)16O31(OH)]2
4.CB.20Magnesiohögbomite-6N6S[(Mg,Fe2+)3(Al,Ti,Fe3+)8O15(OH)]6
4.CB.20Magnesiohögbomite-2N3S[(Mg,Fe2+,Zn)4(Al,Ti,Fe3+)10O19(OH)]2
4.CB.20Magnesiohögbomite-2N2S[(Mg,Fe2+)3[Al7(Ti,Fe3+)]O15(OH)]2
4.CB.20Ferrohögbomite-6N12S[(Fe2+,Mg,Zn)5(Al,Ti,Fe3+)12O23(OH)]6
4.CB.25PseudorutileFe2Ti3O9
4.CB.25KleberiteFeTi6O11(OH)5
4.CB.30BerdesinskiiteV23+TiO5
4.CB.30OxyvaniteV23+V4+O5
4.CB.35Olkhonskite(Cr,V)2Ti3O9
4.CB.35SchreyeriteV23+Ti3O9
4.CB.40Nolanite(V3+,Fe3+,Fe2+,Ti)10O14(OH)2
4.CB.40RinmaniteZn2Sb2Mg2Fe4O14(OH)2
4.CB.40IseiteMn2Mo3O8
4.CB.40MajindeiteMg2Mo3O8
4.CB.45ClaudetiteAs2O3
4.CB.45StibioclaudetiteAsSbO3
4.CB.50ArsenoliteAs2O3
4.CB.50SénarmontiteSb2O3
4.CB.55ValentiniteSb2O3
4.CB.60BismiteBi2O3
4.CB.65SphaerobismoiteBi2O3
4.CB.70SilléniteBi12SiO20
4.CB.75KyzylkumiteTi2V3+O5(OH)
4.CB.80TietaiyangiteFe43+Fe2+TiO9
27.3.1LindgreniteCu3(MoO4)2(OH)2
27.3.2PowelliteCa(MoO4)
27.3.3WulfenitePb(MoO4)
27.3.4KoechliniteBi2MoO6
27.3.5SedoviteU(MoO4)2
27.3.6MouriteUMo5O12(OH)10
27.3.7Iriginite(UO2)Mo2O7 · 3H2O
27.3.8Umohoite(UO2)MoO4 · 2H2O
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 · 12H2O
27.3.14FerrimolybditeFe2(MoO4)3 · nH2O

Other Names for Kamiokite

Name in Other Languages:
German:Kamiokit
Spanish:Kamiokita

Other Information

Other Information:
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 Kamiokite

Reference List:
Mineral.Journ.Japan (1985) 12, 393-399

American Mineralogist (1983): 68: 1038-1039.

American Mineralogist (1988): 73: 191.

Acta Crystallographica: C42: 9-11.

Internet Links for Kamiokite

Localities for Kamiokite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • 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
 
  • Honshu Island
    • Chubu Region
      • Gifu Prefecture
        • Hida City
          • Kamioka mine
Mineral.Journ.Japan (1985) 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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