Arakiite Mineral Data

Arakiite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About


Desert Winds Gems and Minerals
[Mineral Galleries] [About Me] [e-Bay Items] [Latest News] [How to Order]
A Diverse Selection of Beautifully Unique Gem & Mineral Specimens
Desert Winds Gems & Minerals • For All Levels of Collectors Worldwide
Aesthetic & Rare Mineral Specimens • Regular Updates


General Arakiite Information

Help on Chemical Formula: Chemical Formula: (Zn,Mn++)(Mn++,Mg)12(Fe+++,Al)2(AsO3)(AsO4)2(OH)23
Help on Composition: Composition: Molecular Weight = 1,452.97 gm
   Magnesium   7.86 %  Mg   13.04 % MgO
   Manganese  27.60 %  Mn   35.64 % MnO
   Aluminum    1.30 %  Al    2.46 % Al2O3
   Zinc        3.74 %  Zn    4.65 % ZnO
   Iron        5.00 %  Fe    7.14 % Fe2O3
   Arsenic    15.47 %  As    6.81 % As2O3 / 15.82 % As2O5
   Hydrogen    1.60 %  H    14.26 % H2O
   Oxygen     37.44 %  O
             ______        ______ 
             100.00 %       99.81 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn0.83Mn2+7.3Mg4.7Fe3+1.3Al0.7(AsO3)(AsO4)2(OH)23
Help on Environment: Environment: Megascopically indistinguishable from hematolite or dixenite.
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Found on a museum specimen, previously identified as dixenite from Langban, Varmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Dr. Takaharu Araki (1929-), University of Chicago, for his numerous crystal-structure contributions to the science of mineralogy.
Help on Synonym: Synonym: ICSD 87742
  IMA1998-062
  PDF 89-821
 

Arakiite Image

Click Here for Larger Arakiite Image in a New Browser Window Images:
Click Here for Larger Arakiite Image

Arakiite

Comments: Deep red massive arakiite between grains.
Location: Nordmark, Sweden. Scale: See Image.
© Rruff Database

Arakiite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.7316:1:2.9448
Help on Cell Dimensions: Cell Dimensions: a = 14.248, b = 8.228, c = 24.23, Z = 4; beta = 93.62° V = 2,834.88 Den(Calc)= 3.40
Help on Crystal System: Crystal System: Monoclinic - DomaticH-M Symbol (m) Space Group: Cc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 12.07(1), 6.046(1), 4.04(0.9),1.552(0.7), 3.03(0.7), 2.411(0.4), 3.148(0.3),
Click Here for Large Arakiite Structure Window 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


Cooper M A , Hawthorne F C , The Canadian Mineralogist , 37 (1999) p.1471-1482, The effect of differences in coordination on ordering of, polyvalent cations in close-packed structures: The crystal, structure of arakiite and comparison with hematolite

 

Physical Properties of Arakiite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Reddish brown, Orange brown.
Help on Diaphaneity: Diaphaneity: Opaque to translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Resinous - Metallic
Help on Streak: Streak: pale brown
 

Optical Properties of Arakiite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2174,KC= 0.2213
Ncalc = 1.75
Help on Optical Data: Optical Data: Biaxial (-), a=1.723, b=1.744, g=1.75, bire=0.0270, 2V(Calc)=54, 2V(Meas)=40-44. Dispersion r > v medium.
 

Calculated Properties of Arakiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.28 gm/cc
note: Specific Gravity of Arakiite =3.40 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEArakiite = 21.07 barns/electron
U=PEArakiite x rElectron Density= 69.08 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Arakiite is Not Radioactive
 

Arakiite Classification
Help on Dana Class: Dana Class: 46.02.08.02 (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites
  (46.02)with miscellaneous formulae
  (46.02.08)Dixenite Group
 
46.02.08.01 Dixenite CuMn14Fe(AsO3)5(SiO4)2(AsO4)(OH)6 R 3 3
 
46.02.08.02 Arakiite! (Zn,Mn)(Mn,Mg)12(Fe,Al)2(AsO3)(AsO4)2(OH)23 Cc m
Help on Strunz Class: Strunz Class: 08.BE.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BE -With only medium-sized cations, (OH, etc.):RO4 > 2:1
 
08.BE.45 Dixenite CuMn14Fe(AsO3)5(SiO4)2(AsO4)(OH)6 R 3 3
 
08.BE.45 Hematolite (Mn,Mg,Al)15(AsO3)(AsO4)2(OH)23 R 3 3
 
08.BE.45 Kraisslite (Mn,Mg)24Zn3Fe(AsO3)2(AsO4)3(SiO4)6(OH)18 P 6322 6 2 2
 
08.BE.45 Mcgovernite Mn9Mg4Zn2As2Si2O17(OH)14 R 3c 3 2/m
 
08.BE.45 Turtmannite! (Mn,Mg)25.5[(V,As)O4]3(SiO4)3[AsO3]xO5-5x(OH)20x R 3c 3 2/m
 
08.BE.45 Arakiite! (Zn,Mn)(Mn,Mg)12(Fe,Al)2(AsO3)(AsO4)2(OH)23 Cc m
 

Other Arakiite Information
Help on References: References: NAME( MinRec, V31, p253) PHYS. PROP.(MinRec, V31, p253) OPTIC PROP.(MinRec, V31, p253)
Help on See Also: See Also: Links to other databases for Arakiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - Handbook of Mineralogy (MinSocAm)
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Arakiite using:

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

Visit our Advertisers for Arakiite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Arakiite Mineral Data :

Ask about Arakiite 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 Espaņol

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

Arakiite

(Zn,Mn++)(Mn++,Mg)12(Fe+++,Al)2(AsO3)(AsO4)2(OH)23
Dana No: 46.02.08.02 Strunz No: 08.BE.45
Locality:

 

Notes: