Dixenite Mineral Data +

Mineral of the Month Club

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
IMA Status:	Valid Species (Pre-IMA) 1920
Locality:	Langbanshyttan, Vermland, Sweden. Link to MinDat.org Location Data.
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
X Ray Diffraction:	By Intensity(I/Io): 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
Diaphaniety:	Translucent to subtranslucent to opaque
Habit:	Foliated - Two dimensional platy forms.
Hardness:	3-4 - Calcite-Fluorite
Luster:	Vitreous (Glassy)
Optical Properties of Dixenite
Optical Data:	Uniaxial (-), e=1.73, w=1.97, bire=0.2400.
Calculated Properties of Dixenite
Electron Density:	relectron=4.07 gm/cc note: rDixenite =4.36 gm/cc.
Fermion Index	Fermion Index = 0.0021 Boson Index = 0.9979
Photoelectric:	PEDixenite = 29.17 barns/electron U=PEDixenite x relectron= 118.84 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Dixenite is Not Radioactive
Dixenite Classification
Dana Class:	46.2.8.1 (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites
	(46.2)with miscellaneous formulae
	(46.2.8)Dana Group
	46.2.8.1 Dixenite CuMn14Fe(AsO3)5(SiO4)2(AsO4)(OH)6 R 3 3
	46.2.8.2 Arakiite! (Zn,Mn)(Mn,Mg)12(Fe,Al)2(AsO3)(AsO4)2(OH)23 Cc m
Strunz Class:	VIII/B.11-10 VIII - Silicates
	VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6]
	VIII/B.11 - Dixenite - Kraisslite series
	VIII/B.11-10 Dixenite CuMn14Fe(AsO3)5(SiO4)2(AsO4)(OH)6 R 3 3
	VIII/B.11-15 Turtmannite! (Mn,Mg)25.5[(V,As)O4]3(SiO4)3[AsO3]xO5-5x(OH)20x R 3c 3 2/m
	VIII/B.11-20 Mcgovernite Mn9Mg4Zn2As2Si2O17(OH)14 R 3c 3 2/m
	VIII/B.11-30 Kraisslite (Mn,Mg)24Zn3Fe(AsO3)2(AsO4)3(SiO4)6(OH)18 P 6322 6 2 2
	VIII/B.11-40 Asbecasite Ca3(Ti,Sn)As6Si2Be2O20 P 3c 3m
Other Dixenite Information
References:	NAME( Ford32) 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Dixenite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Dixenite : AA Mineral Specimens B & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Dixenite Mineral Data : 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: 46.2.8.1 Strunz No: VIII/B.11-10 Locality:   Notes: