Fahleite Mineral Data

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


General Fahleite Information

Help on Chemical Formula: Chemical Formula: Zn5CaFe+++2(AsO4)6•14(H2O)
Help on Composition: Composition: Molecular Weight = 1,564.45 gm
   Calcium    2.56 %  Ca    3.58 % CaO
   Zinc      20.90 %  Zn   26.01 % ZnO
   Iron       7.14 %  Fe   10.21 % Fe2O3
   Arsenic   28.73 %  As   44.07 % As2O5
   Hydrogen   1.80 %  H    16.12 % H2O
   Oxygen    38.86 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn5CaFe3+2(AsO4)6•14(H2O)
Help on Environment: Environment: May be the Zn analog of smolianinovite.
Help on IMA Status: IMA Status: Approved IMA 1988
Help on Locality: Locality: Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Rolfe Fahle of Munich, Germany, a mineral dealer specializing in Tsumeb specimens.
Help on Name Pronunciation: Name Pronunciation: Fahleite Say FAHLEITE
 

Fahleite Image

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

Fahleite

Comments: Crystalline cleavage fragment of fahleite.
Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fahleite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.546:1:1.8686
Help on Cell Dimensions: Cell Dimensions: a = 6.4, b = 11.72, c = 21.9, Z = 2; V = 1,642.68 Den(Calc)= 3.16
Help on Crystal System: Crystal System: OrthorhombicSpace Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 11(1), 22(1), 3.2(0.8),
 

Physical Properties of Fahleite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Gray, Gray green, Light green, Straw yellow.
Help on Density: Density: 2.1 - 3.16, Average = 2.63
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Silky - Pearly
 

Optical Properties of Fahleite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.173 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.202,KPDmeas= 0.2427,KC= 0.207
Ncalc = 1.43 - 1.65
Help on Optical Data: Optical Data: Biaxial (+), a=1.628, b=1.631, g=1.656, bire=0.0280, 2V(Calc)=40, 2V(Meas)=39.
 

Calculated Properties of Fahleite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.04 gm/cc
note: Specific Gravity of Fahleite =3.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEFahleite = 32.29 barns/electron
U=PEFahleite x rElectron Density= 98.08 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fahleite is Not Radioactive
 

Fahleite Classification
Help on Dana Class: Dana Class: 40.05.08.02 (40)Hydrated Phosphates, etc
  (40.05)with miscellaneous formulae
  (40.05.08)Smolianinovite Group
 
40.05.08.01 Smolianinovite (Co,Ni,Mg,Ca)3(Fe,Al)2(AsO4)4•11(H2O) Unk Ortho
 
40.05.08.02 Fahleite Zn5CaFe2(AsO4)6•14(H2O) Unk Ortho
 
40.05.08.03 Barahonaite-(Fe)! (Ca,Cu,Na,Fe,Al)12Fe2(AsO4)8(OH,Cl)x•nH2O P 2/a or Pa Mono
 
40.05.08.04 Barahonaite-(Al)! (Ca,Cu,Na,Fe,Al)12Al2(AsO4)8(OH,Cl)x•nH2O P 2/a or Pa Mono
Help on Strunz Class: Strunz Class: 08.CH.55 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CH -With large and medium-sized cations, RO4:H2O < 1:1
 
08.CH.55 Fahleite Zn5CaFe2(AsO4)6•14(H2O) Unk Ortho
 
08.CH.55 Smolianinovite (Co,Ni,Mg,Ca)3(Fe,Al)2(AsO4)4•11(H2O) Unk Ortho
 
08.CH.55 IMA2008-048! Zn6(PO4)4•7H2O P1 1
 

Other Fahleite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Am.Min.,Vol.74,p501,1989)
Help on See Also: See Also: Links to other databases for Fahleite :
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

Search for Fahleite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Fahleite :

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

Ask about Fahleite 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 Fahleite Specimen Label here :

Fahleite

Zn5CaFe+++2(AsO4)6•14(H2O)
Dana No: 40.05.08.02 Strunz No: 08.CH.55
Locality:

 

Notes: