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Nealite-(H2O) Mineral Data

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General Nealite-(H2O) Information

Help on Chemical  Formula: Chemical Formula: Pb4Fe++(As+++O3)2Cl4•2(H2O)
Help on Composition: Composition: Molecular Weight = 1,308.33 gm
   Iron       4.27 %  Fe    5.49 % FeO
   Arsenic   11.45 %  As   15.12 % As2O3
   Hydrogen   0.31 %  H     2.75 % H2O
   Lead      63.35 %  Pb   68.24 % PbO
   Chlorine  10.84 %  Cl   10.84 % Cl
               -   %   Cl   -2.45 % -O=Cl2   
   Oxygen     9.78 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb4Fe2+(AsO3)2Cl4•2(H2O)
Help on Environment: Environment: Weathered lead slag.
Help on IMA Status: IMA Status: Not Approved IMA 1980
Help on Locality: Locality: Laurion, Greece. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Neal Yedlin (1908-1977), U. S. Mineralogist, who discovered the mineral.
Help on Name Pronunciation: Name Pronunciation: Nealite-(H2O) Say NEALITE-(H2O)

Nealite-(H2O) Image

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Comments: Orange crystals of nealite-(H2O) on matrix.
Location: Laurium, Greece. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Nealite-(H2O) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6392:1:0.5454
Help on Cell Dimensions: Cell Dimensions: a = 6.548, b = 10.243, c = 5.587, Z = 1; alpha = 96.2°, beta = 89.6°, gamma = 97.7° V = 369.17 Den(Calc)= 5.88
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.54(1), 6.48(0.8), 4.24(0.7),2.78(0.6), 3.25(0.6), 10.09(0.6), 2.97(0.5), 3.92(0.5),

Physical Properties of Nealite-(H2O)

Help on Cleavage: Cleavage: None
Help on Color: Color: Bright orange.
Help on Density: Density: 5.89
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: pale orange

Optical Properties of Nealite-(H2O)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.058 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.056 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1701,KPDmeas= 0.1698,KC= 0.1802
Ncalc = 2.06
Help on Optical Data: Optical Data: Biaxial (?), b=2

Calculated Properties of Nealite-(H2O)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.00 gm/cc
note: Specific Gravity of Nealite-(H2O) =5.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.14
Boson Index = 0.86
Help on Photoelectric: Photoelectric: PENealite-(H2O) =1,155.13 barns/electron
U=PENealite-(H2O) x rElectron Density=5,772.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nealite-(H2O) is Not Radioactive

Nealite-(H2O) 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
  (46.01.06)Dana Group Nealite-(H2O)* Pb4Fe(AsO3)2Cl4•2(H2O) P1 1
Help on  Strunz Class: Strunz Class: 04.JD.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JD -Arsenites, antimonites, bismuthites; with additional anions, with H2O
04.JD.05 Nealite Pb4Fe(AsO4)2Cl4 P1 1
04.JD.05 Nealite-(H2O)* Pb4Fe(AsO3)2Cl4•2(H2O) P1 1

Other Nealite-(H2O) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Nealite-(H2O) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 04.JD.05





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