Mineralogy Database

Finnemanite Mineral Data

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General Finnemanite Information

Help on Chemical  Formula: Chemical Formula: Pb5(As+++O3)3Cl
Help on Composition: Composition: Molecular Weight = 1,440.21 gm
   Arsenic   15.61 %  As   20.61 % As2O3
   Lead      71.93 %  Pb   77.49 % PbO
   Chlorine   2.46 %  Cl    2.46 % Cl
               -   %   Cl   -0.56 % -O=Cl2   
   Oxygen    10.00 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb5(AsO3)3Cl
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1923
Help on Locality: Locality: L�ngban mine, Bergslagen ore district, Filipstad, V�rmland (Wermland), Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for K.J. Finneman who discovered the mineral.
Help on Name Pronunciation: Name Pronunciation: Finnemanite + Pronunciation Say FINNEMANITE
Help on Synonym: Synonym: ICSD 100168
  PDF 14-1887

Finnemanite Image

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Comments: Black, prismatic, twinned crystal of finnemanite.
Location: Långban, Filipstad, Värmland, Sweden. Scale: Crystal length 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Finnemanite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.68426
Help on Cell Dimensions: Cell Dimensions: a = 10.23, c = 7, Z = 2; V = 634.42 Den(Calc)= 7.54
Help on Crystal System: Crystal System: Hexagonal - Pyramidal H-M Symbol (6) Space Group: P 63
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.03(1), 2.88(0.9), 3.35(0.6),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 0 1) ( 0 1 0) ( 0 0 1)

Warning: this java applet does not work in some browsers because of security restrictions.


Physical Properties of Finnemanite

Help on Cleavage: Cleavage: {1011} Distinct
Help on Color: Color: Gray, Black.
Help on Density: Density: 7.265
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Subadamantine

Optical Properties of Finnemanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.115 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.074 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1711,KPDmeas= 0.1775,KC= 0.1593
Ncalc = 2.16 - 2.2
Help on Optical Data: Optical Data: Uniaxial (-), e=2.2847, w=2.2949, bire=0.0102.

Calculated Properties of Finnemanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.26 gm/cc
note: Specific Gravity of Finnemanite =7.54 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PEFinnemanite =1,342.06 barns/electron
U=PEFinnemanite x rElectron Density=8,403.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Finnemanite is Not Radioactive

Finnemanite Classification

Help on  Dana Class: Dana Class: (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites
  (46.01)where (A B)m (XO3)p Zq
  (46.01.01)Dana Group Finnemanite Pb5(AsO3)3Cl P 63 6
Help on  Strunz Class: Strunz Class: 04.JB.45 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JB -Arsenites, antimonites, bismuthites; with additional anions, without H2O
04.JB.45 Finnemanite Pb5(AsO3)3Cl P 63 6

Other Finnemanite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Finnemanite :
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

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Dana No: Strunz No: 04.JB.45





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