Finnemanite Mineral Data + Say FINNEMANITE


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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: Långban mine, Bergslagen ore district, Filipstad, Värmland (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 Synonym: Synonym: ICSD 100168
  PDF 14-1887
 

Finnemanite Image

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Finnemanite

Comments: Black, prismatic, twinned crystal of finnemanite.
Location: L?ngban, Filipstad, V?rmland, 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 - PyramidalH-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:

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Forms: [ 1 0 1] [ 0 1 0] [ 0 0 1]

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Effenberger H , Pertlik F , Tschermaks Mineralogische und Petrographische Mitteilungen , 26 (1979) p.95-107, Die kristallstruktur des finnemanits, Pb5Cl(AsO3)3, mit einem, vergleich zum strukturtyp des chlorapatits, Ca5Cl(PO4)3, Locality: Langban, Varmland, Sweden

View Additional jPOWD Structure files for Finnemanite
[1] [2]
 

Physical Properties of Finnemanite

Help on Cleavage: Cleavage: [1011] Distinct
Help on Color: Color: Gray, Black.
Help on Density: Density: 7.265
Help on Diaphaniety: Diaphaniety: 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
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:

relectron=6.26 gm/cc
note: rFinnemanite =7.54 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.15902
Boson Index = 0.84098
Help on Photoelectric: Photoelectric:

PEFinnemanite =1,342.06 barns/electron
U=PEFinnemanite x relectron=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: 46.1.1.1 (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites
  (46.1)where (A B)m (XO3)p Zq
  (46.1.1)Dana Group
 
46.1.1.1 Finnemanite Pb5(AsO3)3Cl P 63 6
Help on  Strunz Class: Strunz Class: IV/J.03-10 IV - Oxides
  IV/J - Arsenides with [AsO3]3- groups
  IV/J.03 - Finnemanite - Nealite series
 
IV/J.03-10 Finnemanite Pb5(AsO3)3Cl P 63 6
 
IV/J.03-20 Freedite Pb8Cu(AsO3)2O3Cl5 C 2/m 2/m
 
IV/J.03-30 Trigonite Pb3Mn(AsO3)2(AsO2OH) Pn m
 
IV/J.03-40 Rouseite Pb2Mn(AsO3)2·2(H2O) P1,P 1 Tri
 
IV/J.03-50 Nealite Pb4Fe(AsO4)2Cl4 P1 1
 

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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 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

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Finnemanite

Pb5(As+++O3)3Cl
Dana No: 46.1.1.1 Strunz No: IV/J.03-10
Locality:

 

Notes:

 

 
   
 
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