Akatoreite Mineral Data

[Minerals] [Gems] [Sale Items] [Gold Rings] [Big Stuff] [Main Page]
Shop early for Holiday Season and get the best stuff.
You can put it on layaway for up to six weeks!

General Akatoreite Information

Chemical Formula:

(Mn++,Fe++)9Al2Si8O24(OH)8

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

Empirical Formula:

Mn²⁺_8.61Fe²⁺_0.19Mg_0.09Ca_0.05Al_2.09Si_7.75O_23.17(OH)_8.83

Environment:

In a manganiferous metachert and carbonate lens in schists (Akatore Creek, New Zealand); in a manganiferous potassium-rich felsic metavolcanics (Norberg, Sweden).

IMA Status:

Approved IMA 1971

Locality:

In New Zealand, three km south of Akatore Creek, east Otago, South Island. From Norberg, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Akatoreite + Pronunciation

Synonym:

ICSD 41243

PDF 25-533

Akatoreite Image

Images:

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

Axial Ratios:

a:b:c =0.8041:1:0.7358

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

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 4.665(1), 3.31(0.9), 2.214(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Burns P C , Hawthorne F C , The Canadian Mineralogist , 31 (1993) p.321-329, Edge-sharing MnO4 tetrahedra in the structure of akatoreite,, Mn9Al2Si8O24(OH)8

Physical Properties of Akatoreite

Cleavage:

{010} Perfect, {021} Good

Color:

Orange, Brown.

Density:

3.48

Diaphaneity:

Transparent

Habit:

Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat.

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

yellow white

Optical Properties of Akatoreite

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

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

Electron Density:

Bulk Density (Electron Density)=3.38 gm/cc
note: Specific Gravity of Akatoreite =3.48 gm/cc.

Fermion Index:

Fermion Index = 0.0084648605
Boson Index = 0.9915351395

Photoelectric:

PE_Akatoreite= 10.46 barns/electron
U=PE_Akatoreite x rElectron Density= 35.35 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Akatoreite is Not Radioactive

Akatoreite Classification

Dana Class:

57.02.03.01 (57)Sorosilicate Insular Si3O10 and Larger Noncyclic Groups

(57.02)with [Si4O13] groups

(57.02.03)Akatoreite Group

57.02.03.01 Akatoreite (Mn,Fe)9Al2Si8O24(OH)8 P1 1

57.02.03.02 Hubeite! Ca2MnFeSi4O12(OH)(H2O)2 P1 1

57.02.03.03 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

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

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Akatoreite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Akatoreite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Akatoreite Mineral Data :

Ask about Akatoreite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Akatoreite

(Mn++,Fe++)9Al2Si8O24(OH)8
Dana No: 57.02.03.01 Strunz No: 09.BH.15
Locality:

Notes: