Dixenite Mineral Data

General Dixenite Information

Chemical Formula:

Cu+Mn++14Fe+++(As+++O3)5(SiO4)2(As+++++O4)(OH)6

Composition:

Molecular Weight = 1,928.25 gm

Manganese 39.89 % Mn 51.50 % MnO

Iron 2.90 % Fe 4.14 % Fe₂O₃

Copper 3.30 % Cu 3.71 % Cu₂O

Silicon 2.91 % Si 6.23 % SiO₂

Arsenic 23.31 % As 25.65 % As₂O₃ / 5.96 % As₂O₅

Hydrogen 0.31 % H 2.80 % H₂O

Oxygen 27.38 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CuMn²⁺₁₄Fe³⁺(AsO₃)₅(SiO₄)₂(AsO₄)(OH)₆

Environment:

In a metamorphosed Fe-Mn orebody in serpentine.

IMA Status:

Valid Species (Pre-IMA) 1920

Locality:

Langbanshyttan, Vermland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek di, for two, and xenos, for stranger, in reference to the then unique association of silica and arsenious oxide in the mineral.

Name Pronunciation:

Dixenite

Synonym:

ICSD 30787

PDF 35-520

Dixenite Image

Images:

Dixenite

Comments: Deep red translucent crystalline grains of dixenite.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Dixenite Crystallography

Axial Ratios:

a:c = 1:4.55362

Cell Dimensions:

a = 8.233, c = 37.49, Z = 3; V = 2,200.71 Den(Calc)= 4.36

Crystal System:

Trigonal - PyramidalH-M Symbol (3) Space Group: R 3

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

By Intensity(I/I_o): 2.927(1), 3.435(0.44), 2.965(0.36),

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

Araki T , Moore P B , American Mineralogist , 66 (1981) p.1263-1273, Dixenite, CuMn14Fe(OH)6(AsO3)5(SiO4)2(AsO4): Metallic [As4Cu] clusters, in an oxide matrix

Physical Properties of Dixenite

Cleavage:

{001} Perfect

Color:

Bronze, Black.

Density:

4.2

Diaphaneity:

Translucent to subtranslucent to opaque

Habit:

Foliated - Two dimensional platy forms.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Optical Properties of Dixenite

Gladstone-Dale:

CI meas= 0.061 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.096 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.195,KPDmeas= 0.2024,KC= 0.2156
Ncalc = 1.91 - 1.94

Optical Data:

Uniaxial (-), e=1.73, w=1.97, bire=0.2400.

Calculated Properties of Dixenite

Electron Density:

Bulk Density (Electron Density)=3.93 gm/cc
note: Specific Gravity of Dixenite =4.20 gm/cc.

Fermion Index:

Fermion Index = 0.002106299
Boson Index = 0.997893701

Photoelectric:

PE_Dixenite= 29.17 barns/electron
U=PE_Dixenite x rElectron Density= 114.48 barns/cc.

Radioactivity:

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

Dixenite Classification

Dana Class:

46.02.08.01 (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

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 Dixenite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Dixenite :
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
15 - WWW-MINCRYST

Search for Dixenite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Dixenite :

A Bijoux Google Search for Dixenite
Adam's Minerals Google Search for Dixenite
Cape Minerals Google Search for Dixenite
Dakota Matrix Minerals Google Search for Dixenite
Excalibur Mineral Corp. Google Search for Dixenite
Exceptional Minerals Google Search for Dixenite
John Betts Fine Minerals Search for Dixenite
McDougall Minerals Google Search for Dixenite
Mineral News Website Link
Rock and Mineral Shows Google Search for Dixenite
Weinrich Minerals, Inc. Google Search for Dixenite

Ask about Dixenite 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 Dixenite Specimen Label here :

Dixenite

Cu+Mn++14Fe+++(As+++O3)5(SiO4)2(As+++++O4)(OH)6
Dana No: 46.02.08.01 Strunz No: 08.BE.45
Locality:

Notes: