Kamiokite Mineral Data

Kamiokite Mineral Data +

General Kamiokite Information

Chemical Formula:

Fe2Mo3O8

Composition:

Molecular Weight = 527.51 gm

Iron 21.17 % Fe 27.24 % FeO

Molybdenum 54.56 % Mo 72.76 % MoO₂

Oxygen 24.26 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺₂Mo₃O₈

Environment:

In quartz-molybdenite stockwork veins associated with granite porphyry dikes.

IMA Status:

Approved IMA 1985

Locality:

Kamioka Ag-Pb-Zn mine, Gifu Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 61069

PDF 36-526

Kamiokite Image

Images:

Kamiokite

Comments: Dull dark gray-black sectile massive kamiokite.
Location: Krupka, Severocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kamiokite Crystallography

Axial Ratios:

a:c = 1:1.73867

Cell Dimensions:

a = 5.782, c = 10.053, Z = 2; V = 291.06 Den(Calc)= 6.02

Crystal System:

Hexagonal - Dihexagonal PyramidalH-M Symbol (6mm) Space Group: P 6₃mc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.03(1), 3.55(0.9), 2.509(0.75),

Crystal Structure:

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Kanazawa Y , Sasaki A , Acta Crystallographica, Section C , 42 (1986) p.9-11, Structure of kamiokite, Locality: Kamioka mine, Gifu Prefecture, Japan, Note: anisoB s taken from ICSD

Physical Properties of Kamiokite

Cleavage:

[0001] Perfect

Color:

Iron black.

Density:

5.96

Diaphaniety:

Opaque

Fracture:

Even - Flat surfaces (not cleavage) fractured in an even pattern.

Habit:

Hexagonal - Six-sided crystal shape in cross-section or habit.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Sub Metallic

Streak:

black

Optical Properties of Kamiokite

Optical Data:

Uniaxial (-).

NCalc= 1.31 - from Gladstone-Dale relationship (KC = 0.0512) where Ncalc=Dcalc*KC+1
NCalc= 1.31 - from Gladstone-Dale relationship (KC = 0.0512) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Strong, light brownish gray to dark greenish gray.

RL Bireflectance:

Strong, gray to olive-gray.

RL Color:

Gray with an olive tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Kamiokite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	19.00	25.40
420 nm	18.60	25.00
440 nm	18.20	24.60
460 nm	17.80	24.20
480 nm	17.40	23.80
500 nm	17.10	23.50
520 nm	16.80	23.20
540 nm	16.60	23.00
560 nm	16.40	22.70
580 nm	16.10	22.50
600 nm	15.90	22.30
620 nm	15.80	22.20
640 nm	15.80	22.30
660 nm	15.90	22.40
680 nm	16.00	22.60
700 nm	16.30	22.70

**Calculated Relative Intensity Colors of Kamiokite in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	540%
R₁
R₂

Calculated Properties of Kamiokite

Electron Density:

r_electron=5.52 gm/cc
note: r_Kamiokite=6.02 gm/cc.

Fermion Index

Fermion Index = 0.14357
Boson Index = 0.85643

Photoelectric:

PE_Kamiokite= 97.61 barns/electron
U=PE_Kamiokite x r_electron= 539.14 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Kamiokite is Not Radioactive

Kamiokite Classification

Dana Class:

7.6.3.1 (7)Multiple Oxides

(7.6)where A (B)4 X9

(7.6.3)Dana Group

7.6.3.1 Kamiokite Fe2Mo3O8 P 6₃mc 6mm

Strunz Class:

IV/C.07-30 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.07 - Högbomite - Mengxianminite series

IV/C.07-10* Magnesiohogbomite-2N2S (Al,Fe,Fe,Mg,Ti,Zn)11O15(OH) P 6₃mc 6mm

IV/C.07-10** Magnesiohogbomite-2N3S (Mg,Fe)1.4Ti0.3Al4O8 P 6₃mc 6mm

IV/C.07-10 Magnesiohogbomite-6N6S (Mg,Fe)1.4Ti0.3Al4O8 R 3m 3 2/m

IV/C.07-15 Zincohogbomite-2N2S! (Zn,Fe)(2-2x)(Ti)xAl4O8 P 6₃mc 6mm

IV/C.07-17 Ferrohogbomite-2N2S! (Fe,Zn,Mg,Al)6Al14(Ti,Fe)2O30(OH)2 P 6₃mc 6mm

IV/C.07-20 Freudenbergite Na2Fe2Ti6O16 C 2/m 2/m

IV/C.07-30 Kamiokite Fe2Mo3O8 P 6₃mc 6mm

IV/C.07-40 Nolanite (V,Fe,Fe,Ti)10O14(OH)2 P 6₃mc 6mm

IV/C.07-42 Rinmanite! (Zn,Mn)2Sb2Mg2Fe4O14(OH)2 P 6₃mc 6mm

IV/C.07-45 Magnesionigerite-2N1S (Mg,Zn,Fe,Al)4(Sn,Fe)2Al10O22(OH)2 P 3m 3 2/m

IV/C.07-45* Magnesionigerite-6N6S (Mg,Zn,Fe,Al)4(Sn,Fe)2Al10O22(OH)2 Unk Trig

IV/C.07-50 Ferronigerite-2N1S (Zn,Mg,Fe)(Sn,Zn)2(Al,Fe)12O22(OH)2 P 3m or P 3m1 3 2/m

IV/C.07-50* Ferronigerite-6N6S (Fe,Zn)4Sn2(Al,Fe)15O30(OH)2 R 3m 3 2/m

IV/C.07-60 Mengxianminite* (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 Unk Ortho

Other Kamiokite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Kamiokite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Kamiokite Specimen Label here :

Kamiokite

Fe2Mo3O8
Dana No: 7.6.3.1 Strunz No: IV/C.07-30
Locality:

Notes: