Mineralogy Database

Akatoreite Mineral Data

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General Akatoreite Information

Help on Chemical  Formula: Chemical Formula: (Mn++,Fe++)9Al2Si8O24(OH)8
Help on Composition: Composition: Molecular Weight = 1,282.75 gm
   Calcium     0.16 %  Ca    0.22 % CaO
   Magnesium   0.17 %  Mg    0.28 % MgO
   Manganese  36.88 %  Mn   47.61 % MnO
   Aluminum    4.40 %  Al    8.31 % Al2O3
   Iron        0.83 %  Fe    1.06 % FeO
   Silicon    16.97 %  Si   36.30 % SiO2
   Hydrogen    0.69 %  H     6.20 % H2O
   Oxygen     39.91 %  O
             ______        ______ 
             100.00 %       99.99 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+8.61Fe2+0.19Mg0.09Ca0.05Al2.09Si7.75O23.17(OH)8.83
Help on Environment: Environment: In a manganiferous metachert and carbonate lens in schists (Akatore Creek, New Zealand); in a manganiferous potassium-rich felsic metavolcanics (Norberg, Sweden).
Help on IMA Status: IMA Status: Approved IMA 1971
Help on Locality: Locality: In New Zealand, three km south of Akatore Creek, east Otago, South Island. From Norberg, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Akatoreite + Pronunciation Say AKATOREITE
Help on Synonym: Synonym: ICSD 41243
  PDF 25-533

Akatoreite Image

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  Akatoreite   Rhodonite

Comments: Brown akatoreite in pink rhodonite.
Location: Akatore Creek, Eastern Otago Peninsula, South Island, New Zealand. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Akatoreite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8041:1:0.7358
Help on Cell Dimensions: Cell Dimensions: a = 8.337, b = 10.367, c = 7.629, Z = 1; alpha = 104.96°, beta = 93.81°, gamma = 104.18° V = 616.25 Den(Calc)= 3.46
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.665(1), 3.31(0.9), 2.214(0.8),

Physical Properties of Akatoreite

Help on Cleavage: Cleavage: {010} Perfect, {021} Good
Help on Color: Color: Orange, Brown.
Help on Density: Density: 3.48
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellow white

Optical Properties of Akatoreite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2033,KPDmeas= 0.2033,KC= 0.2106
Ncalc = 1.73
Help on Optical Data: Optical Data: Biaxial (+), a=1.698, b=1.704, g=1.72, bire=0.0220, 2V(Calc)=64, 2V(Meas)=65.5.

Calculated Properties of Akatoreite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.38 gm/cc
note: Specific Gravity of Akatoreite =3.48 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0084648605
Boson Index = 0.9915351395
Help on Photoelectric: Photoelectric: PEAkatoreite = 10.46 barns/electron
U=PEAkatoreite x rElectron Density= 35.35 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Akatoreite is Not Radioactive

Akatoreite Classification

Help on  Dana Class: Dana Class: (57)Sorosilicate Insular Si3O10 and Larger Noncyclic Groups
  (57.02)with [Si4O13] groups
  (57.02.03)Akatoreite Group Akatoreite (Mn,Fe)9Al2Si8O24(OH)8 P1 1 Hubeite! Ca2MnFeSi4O12(OH)(H2O)2 P1 1 Cassagnaite! (Ca,Mn)4(Fe,Mn,Al)4(OH)4(V,Mg,Al)2(O,OH)4(Si3O10)(SiO4)2 C mcm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.BH.15 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BH -Sorosilicates with Si3O10, Si4O11, etc
09.BH.15 Akatoreite (Mn,Fe)9Al2Si8O24(OH)8 P1 1

Other Akatoreite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Akatoreite :
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: 09.BH.15





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