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Kamiokite

A valid IMA mineral species
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07732920017480506175136.png
Kamiokite, etc.

Vrchoslav fluorite deposit, Vrchoslav, Krupka, Teplice District, Ústí nad Labem Region, Czech Republic
06844560017812477737569.jpg
Kamiokite, etc.

Tochibora deposit, Kamioka Mine, Hida City, Gifu Prefecture, Japan
03767140017759604941199.png
Kamiokite

Vrchoslav fluorite deposit, Vrchoslav, Krupka, Teplice District, Ústí nad Labem Region, Czech Republic
08477120017478568548396.png
Kamiokite, etc.

Vrchoslav fluorite deposit, Vrchoslav, Krupka, Teplice District, Ústí nad Labem Region, Czech Republic
05861390017812355252294.jpg
Kamiokite, etc.

Tochibora deposit, Kamioka Mine, Hida City, Gifu Prefecture, Japan
01019170017271924173956.png
Kamiokite

Vrchoslav fluorite deposit, Vrchoslav, Krupka, Teplice District, Ústí nad Labem Region, Czech Republic
09327260017479199086096.png
Kamiokite, etc.

Vrchoslav fluorite deposit, Vrchoslav, Krupka, Teplice District, Ústí nad Labem Region, Czech Republic
06844560017812477737569.jpg
Kamiokite, etc.

Tochibora deposit, Kamioka Mine, Hida City, Gifu Prefecture, Japan
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About KamiokiteHide

00628710017271924274556.jpg
Distant view of Nijyuugoyama and Kamioka adit

Nijuugoyama, Kamioka Mine, Hida City, Gifu Prefecture, Japan
Formula:
Fe2Mo3O8
Colour:
Black, grey with olive tint in reflected light
Lustre:
Metallic, Sub-Metallic
Hardness:
4½
Specific Gravity:
5.96
Crystal System:
Hexagonal
Name:
Named by D. Picot and Z. Johan in 1977 for the type locality, Kamioka mine, Japan.
Isostructural with:
Iseite
The iron analogue of iseite and majindeite.


Unique IdentifiersHide

Mindat ID:
2147
Long-form identifier:
mindat:1:1:2147:6

IMA Classification of KamiokiteHide

Classification of KamiokiteHide

Strunz-mindat (2026):
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
Dana 8th ed.:
7.6.3.1

7 : MULTIPLE OXIDES
6 : (AB)5X8
Hey's CIM Ref.:
27.3.13

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
KmkIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of KamiokiteHide

Lustre:
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:
Uniaxial (-)
Anisotropism:
Strong - light brownish gray to dark greenish gray
Colour in reflected light:
grey, olive tint
Internal Reflections:
None

Chemistry of KamiokiteHide

Mindat Formula:
Fe2Mo3O8
Element Weights:
Element% weight
Mo54.568 %
O24.262 %
Fe21.171 %

Calculated from ideal end-member formula.
Elements listed:
Fe, Mo, O - search for minerals with similar chemistry

Crystallography of KamiokiteHide

Crystal System:
Hexagonal
Class (H-M):
6mm - Dihexagonal Pyramidal
Space Group:
P63mc
Cell Parameters:
a = 5.781(1) Å, c = 10.060(1) Å
Ratio:
a:c = 1 : 1.74
Unit Cell V:
291.16 ų (Calculated from Unit Cell)
Z:
2

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0010022KamiokiteKanazawa Y, Sasaki A (1986) Structure of kamiokite Acta Crystallographica C42 9-111986Kamioka mine, Gifu Prefecture, Japan0293
0016631Kamiokitele Page Y, Strobel P (1982) Structure of Iron(II) Molybdenum(IV) Oxide Fe2 Mo3 O8 _cod_database_code 1008752 Acta Crystallographica B38 1265-126719820293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.03 Å(100)
3.55 Å(90)
2.509 Å(75b)
2.430 Å(55)
2.006 Å(40)
2.785 Å(35)
1.5678 Å(35)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)
Stage 5: Initiation of plate tectonics<3.5-2.5
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)

Type Occurrence of KamiokiteHide

Type Locality:
ⓘ Tochibora deposit, Kamioka Mine, Hida City, Gifu Prefecture, Japan
General Appearance of Type Material:
thick tabular hexagonal crystals to 3 mm
Place of Conservation of Type Material:
Geology Museum (Geological Survey of Japan)
Geological Setting of Type Material:
Vein in a skarn
Associated Minerals at Type Locality:
FluoriteIlmeniteK FeldsparMolybdeniteQuartz
Scheelite
Reference:
Picot, P. and Johan, Z. (1977) Atlas des Minéraux Métalliques. Atlas des Minéraux Métalliques. Mémoires du Bureau de Recherches Géologiques et Minières: 90, 406 pp.p.219 - (Kamiokite)

Synonyms of KamiokiteHide

Other Language Names for KamiokiteHide

Dutch:Kamiokiet
German:Kamiokit
Spanish:Kamiokita

Relationship of Kamiokite to other SpeciesHide

Member of:
Kamiokite Group > Nolanite Supergroup
Other Members of Kamiokite Group:
IseiteMn2Mo3O8Hex. 6mm : P63mc
MajindeiteMg2Mo3O8Hex. 6mm : P63mc

Common AssociatesHide

Associations Based on Photo Data:
5 photos of Kamiokite associated with MolybdeniteMoS2
2 photos of Kamiokite associated with JordisiteMoS2
2 photos of Kamiokite associated with IlsemanniteMo3O8 · nH2O
2 photos of Kamiokite associated with FerrimolybditeFe2(MoO4)3 · nH2O
2 photos of Kamiokite associated with FluoriteCaF2
1 photo of Kamiokite associated with MonipiteMoNiP
1 photo of Kamiokite associated with TugarinoviteMoO2
1 photo of Kamiokite associated with 'Apatite'Ca5(PO4)3A
1 photo of Kamiokite associated with MagnetiteFe2+Fe3+2O4
1 photo of Kamiokite associated with SpinelMgAl2O4

Related Minerals - Strunz-mindat GroupingHide

4.CB.Magnesiohögbomite-6N12SMg5Al11TiO23(OH)Trig. 3m(32/m) : R3m
4.CB.KidoditeBaMg2Fe16O27Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CB.Ferrohögbomite-2N2S[(Fe2+,Mg,Zn,Al)3(Al,Ti,Fe3+)8O15(OH)]2Hex. 6mm : P63mc
4.CB.Zhenruite(MoO3)2 · H2OMon. 2/m : P21/m
4.CB.FuyuaniteMg7Nb6O18(OH)8Trig. 3 : P3
4.CB.VirgilluethiteMoO3 · H2OMon. 2/m : P21/b
4.CB.Pengite(Pb8Sb3+3)Σ11Sb5+9O35Trig. 3m(32/m) : R3m
4.CB.05BrizziiteNaSb5+O3Trig. 3 : R3
4.CB.05TistariteTi3+2O3Trig. 3m(32/m) : R3c
4.CB.05HematiteFe2O3Trig. 3m(32/m) : R3c
4.CB.05EcandrewsiteZnTiO3Trig. 3 : R3
4.CB.05MelanostibiteMn2+2Fe3+Sb5+O6Trig. 3 : R3
4.CB.05'UM1998-11-O-AuHSb'Au+2Sb3+O2(OH)
4.CB.05KarelianiteV3+2O3Trig. 3m(32/m) : R3c
4.CB.05CorundumAl2O3Trig. 3m(32/m) : R3c
4.CB.05EskolaiteCr2O3Trig. 3m(32/m) : R3c
4.CB.05GeikieliteMgTiO3Trig. 3 : R3
4.CB.05AkimotoiteMgSiO3Trig. 3 : R3
4.CB.05'Unnamed (Fe-Cr Oxide)'FeCrO3Trig. 3 : R3
4.CB.05'Auroantimonate'AuSbO3
4.CB.05HemleyiteFe2+SiO3Trig. 3 : R3
4.CB.05IlmeniteFe2+TiO3Trig. 3 : R3
4.CB.05PyrophaniteMn2+TiO3Trig. 3 : R3
4.CB.10Bixbyite-(Fe)(Fe,Mn)2O3Iso.
4.CB.10Bixbyite-(Mn)Mn3+2O3Iso. m3(2/m3) : Ia3
4.CB.10AvicenniteTl3+2O3Iso. m3(2/m3) : Ia3
4.CB.15ArmalcoliteMgTi4+2O5Orth. mmm(2/m2/m2/m)
4.CB.15FerropseudobrookiteFe2+Ti4+2O5Orth. mmm(2/m2/m2/m) : Cmcm
4.CB.15GriffiniteAl2Ti4+O5Orth. mmm(2/m2/m2/m) : Cmcm
4.CB.15Pseudobrookite Group
4.CB.15SassiteTi3+2Ti4+O5Orth. mmm(2/m2/m2/m) : Cmcm
4.CB.15PseudobrookiteFe3+2Ti4+O5Orth. mmm(2/m2/m2/m) : Cmcm
4.CB.20Zincovelesite-6N6SZn3(Fe3+,Mn3+,Al,Ti)8O15(OH)Trig. 3m(32/m) : P3m1
4.CB.20Magnesiohögbomite-2N4S(Mg8.43Fe2+1.57)Σ=10Al22Ti4+2O46(OH)2Hex. 6mm : P63mc
4.CB.20Magnesiobeltrandoite-2N3S(Mg6Al2)(Al18Fe3+2)O38(OH)2 Trig. 3m : P3m1
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(32/m) : R3m
4.CB.20Magnesiohögbomite-2N3S[(Mg,Fe2+,Zn)4(Al,Ti,Fe3+)10O19(OH)]2Trig. 3m(32/m) : P31m
4.CB.20Magnesiohögbomite-2N2S[(Mg,Fe2+)3[Al7(Ti,Fe3+)]O15(OH)]2Hex. 6mm : P63mc
4.CB.20'Ferrohögbomite-6N12S'[(Fe2+,Mg,Zn)5(Al,Ti,Fe3+)12O23(OH)]6Trig. 3m(32/m) : R3m
4.CB.20Zincohögbomite-2N2S[(Zn,Al,Fe2+)3(Al,Fe3+,Ti)8O15(OH)]2Hex. 6mm : P63mc
4.CB.25KleberiteFeTi6O11(OH)5Mon. 2/m : P21/b
4.CB.25PseudorutileFe3+2Ti4+3O9Hex. 622 : P6322
4.CB.30OxyvaniteV3+2V4+O5Mon. 2/m : B2/b
4.CB.30BerdesinskiiteV3+2TiO5Mon.
4.CB.30KaitianiteTi3+2Ti4+O5Mon. 2/m : B2/b
4.CB.35MachiiteAl2Ti3O9Mon. 2/m : B2/b
4.CB.35Vestaite(Ti4+Fe2+)Ti4+3O9Mon. 2/m : B2/b
4.CB.35Olkhonskite(Cr,V)2Ti3O9Mon.
4.CB.35SchreyeriteV3+2Ti4+3O9Mon. 2/m : B2/b
4.CB.40Zincorinmanite-(Zn)Zn2Sb2(Fe3+4Zn2)O14(OH)2Hex. 6mm : P63mc
4.CB.40MajindeiteMg2Mo3O8Hex. 6mm : P63mc
4.CB.40AlmagreraiteCuZnMn4+3O8Orth. mm2 : Pmn21
4.CB.40NolaniteV3+8Fe3+2O14(OH)2Hex. 6mm : P63mc
4.CB.40IseiteMn2Mo3O8Hex. 6mm : P63mc
4.CB.40RinmaniteZn2Sb2Mg2Fe4O14(OH)2Hex. 6 : P63
4.CB.45StibioclaudetiteAsSbO3Mon. 2/m : P21/m
4.CB.45ClaudetiteAs2O3Mon. 2/m
4.CB.50SenarmontiteSb2O3Iso. m3m(4/m32/m) : Fd3m
4.CB.50ArsenoliteAs2O3Iso. m3m(4/m32/m) : Fd3m
4.CB.55ValentiniteSb2O3Orth. mmm(2/m2/m2/m) : Pccn
4.CB.60BismiteBi2O3Mon. 2/m : P21/b
4.CB.65SphaerobismoiteBi2O3Tet.
4.CB.70SilléniteBi12SiO20Iso. 23 : I23
4.CB.75KyzylkumiteV3+Ti2O5(OH)Mon. 2/m : P21/b
4.CB.80'Tietaiyangite'Fe3+4Fe2+TiO9Hex.
4.CB.85LiuiteFeTiO3Orth. mmm(2/m2/m2/m) : Pnma
4.CB.90LuogufengiteFe2O3Orth. mm2 : Pna21
4.CB.95WangdaodeiteFeTiO3Trig. 3m : R3c

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.

Internet Links for KamiokiteHide

References for KamiokiteHide

Localities for KamiokiteHide

Showing 9 localities.

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.
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Locality ListHide

- 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.
Brazil
 
  • Pará
Johan et al. (1986)
China
 
  • Xinjiang
    • Hami Prefecture (Kumul Prefecture; Qumul Prefecture)
      • Yizhou District
Han et al. (2014)
Czech Republic
 
  • Ústí nad Labem Region
    • Teplice District
      • Krupka
        • Vrchoslav
Sejkora +1 other reference
Japan (TL)
 
  • Gifu Prefecture
    • Hida City
      • Kamioka Mine
SASAKI et al. (1985)
Mexico
 
  • Chihuahua
    • Pueblito de Allende
72nd Meteor.Soc. Meeting (2009)
Russia
 
  • Ryazan Oblast
Yu. Engalychev (2019)
USA
 
  • Michigan
    • Keweenaw County
      • Allouez Township
        • Ahmeek
Dunn et al. (1983)
        • Mohawk
Dunn et al. (1983)
  • Washington
    • Stevens County
      • Springdale Mining District
Wolff et al. (2014)
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