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 % Fe2 O3
Copper 3.30 % Cu 3.71 % Cu2 O
Silicon 2.91 % Si 6.23 % SiO2
Arsenic 23.31 % As 25.65 % As2 O3 / 5.96 % As2 O5
Hydrogen 0.31 % H 2.80 % H2 O
Oxygen 27.38 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
CuMn2+ 14 Fe3+ (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 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 - Pyramidal H-M Symbol (3) Space Group: R 3
X Ray Diffraction:
By Intensity(I/Io ): 2.927(1), 3.435(0.44), 2.965(0.36),
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:
PEDixenite = 29.17 barns/electronU=PEDixenite x r Electron 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 63 22 6 2 2
08.BE.45 Mcgovernite Mn9Mg4Zn2As2Si2O17(OH)14 R 3 c 3 2/m
08.BE.45 Turtmannite ! (Mn,Mg)25.5[(V,As)O4]3(SiO4)3[AsO3]xO5-5x(OH)20x R 3 c 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
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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:
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