Mineralogy Database

Akaganeite Mineral Data

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General Akaganeite Information

Help on Chemical  Formula: Chemical Formula: Fe+++(O,OH,Cl)
Help on Composition: Composition: Molecular Weight = 761.37 gm
   Iron      55.75 %  Fe   79.70 % Fe2O3
   Nickel     3.08 %  Ni    3.92 % NiO
   Hydrogen   1.28 %  H    11.48 % H2O
   Chlorine   6.05 %  Cl    6.05 % Cl
               -   %   Cl   -1.37 % -O=Cl2   
   Oxygen    33.83 %  O
            ______        ______ 
            100.00 %       99.79 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+7.6Ni0.4O6.4(OH)9.7Cl1.3
Help on Environment: Environment: Apparently formed from pyrrhotite by ferric-sulfate-bearing solutions. Transforms to hematite at 290 to 310 Deg. C.
Help on IMA Status: IMA Status: Approved IMA 1961
Help on Locality: Locality: Akagane mine, Iwate Prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Akaganeite + Pronunciation Say AKAGANEITE
Help on Synonym: Synonym: ICSD 69606
  PDF 42-1315

Akaganeite Image

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Comments: Rusty brown coating of akaganeite on rock.
Location: Wells, Elko County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Akaganeite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.4927:1:3.469
Help on Cell Dimensions: Cell Dimensions: a = 10.587, b = 3.0311, c = 10.515, Z = 1; beta = 90.03° V = 337.43 Den(Calc)= 3.75
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.635(1), 3.311(1), 7.4(1),

Physical Properties of Akaganeite

Help on Color: Color: Brown, Rusty brown.
Help on Density: Density: 3
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Powdery - Forms a loose, poorly-coherent pulverulent mass.
Help on Luster: Luster: Adamantine - Metallic
Help on Streak: Streak: brownish yellow

Optical Properties of Akaganeite

Help on Optical Data: Optical Data: Biaxial (?)
  NCalc= 2.19 - from Gladstone-Dale relationship (KC = 0.3161) where Ncalc=Dcalc*KC+1
NCalc= 1.95 - from Gladstone-Dale relationship (KC = 0.3161) where Ncalc=Dmeas*KC+1

Calculated Properties of Akaganeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.64 gm/cc
note: Specific Gravity of Akaganeite =3.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEAkaganeite = 18.39 barns/electron
U=PEAkaganeite x rElectron Density= 66.91 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Akaganeite is Not Radioactive

Akaganeite Classification

Help on  Dana Class: Dana Class: (06)Hydroxides and Oxides Containing Hydroxyl
  (06.01)where X+++O OH
  (06.01.06)Dana Group Akaganeite Fe(O,OH,Cl) I2/m 2/m
Help on  Strunz Class: Strunz Class: 04.DK.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DK -With large (� medium-sized) cations; tunnel structures
04.DK.05 Akaganeite Fe(O,OH,Cl) I2/m 2/m
04.DK.05 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m
04.DK.05 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m
04.DK.05 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m
04.DK.05 Manjiroite (Na,K)(Mn,Mn)8O16•n(H2O) I 4/m 4/m
04.DK.05 Mannardite BaTi6V2O16•(H2O) I 41/a 4/m
04.DK.05 Redledgeite BaTi6Cr2O16•(H2O) I 41/a 4/m
04.DK.05 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m
04.DK.05 Henrymeyerite! BaFeTi7O16 I 4/m 4/m

Other Akaganeite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(AmMin, v 88, p 782)
Help on See Also: See Also: Links to other databases for Akaganeite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 04.DK.05





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