Mineralogy Database

Damaraite Mineral Data

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General Damaraite Information

Help on Chemical  Formula: Chemical Formula: Pb3O2(OH)Cl
Help on Composition: Composition: Molecular Weight = 706.06 gm
   Hydrogen   0.14 %  H     1.28 % H2O
   Lead      88.04 %  Pb   94.84 % PbO
   Chlorine   5.02 %  Cl    5.02 % Cl
               -   %   Cl   -1.13 % -O=Cl2   
   Oxygen     6.80 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb3O2(OH)Cl
Help on Environment: Environment: Oxidized zone.
Help on IMA Status: IMA Status: Approved IMA 1990
Help on Locality: Locality: Kombat mine, 49 km S of Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Damara sequence, the dolostones that host the deposit at the type locality.
Help on Name Pronunciation: Name Pronunciation: Damaraite + Pronunciation Say DAMARAITE
Help on Synonym: Synonym: IMA1989-013
 

Damaraite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8399:1:2.195
Help on Cell Dimensions: Cell Dimensions: a = 5.813, b = 6.921, c = 15.192, Z = 4; V = 611.20 Den(Calc)= 7.67
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pmc2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.766(1), 2.902(1), 3.164(0.6),
 

Physical Properties of Damaraite

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Colorless.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white
 

Optical Properties of Damaraite

Help on Optical Data: Optical Data: NCalc= 2.12 - from Gladstone-Dale relationship (KC = 0.1463) where Ncalc=Dcalc*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Bireflectance: RL Bireflectance: Weak.
Help on RL Color: RL Color: Gray with white to colorless internal reflections.
Help on RL Pleochroism: RL Pleochroism: Very weak, gray to slightly bluish gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Damaraite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   19.10   20.80 
   
 420 nm   18.60   23.10 
 440 nm   17.90   21.10 
 460 nm   17.40   19.40 
 480 nm   16.90   18.50 
 500 nm   16.60   17.90 
 520 nm   16.20   17.40 
 540 nm   16.00   17.00 
 560 nm   15.80   16.70 
 580 nm   15.60   16.50 
 600 nm   15.50   16.30 
 620 nm   15.40   16.20 
 640 nm   15.20   16.00 
 660 nm   15.20   15.90 
 680 nm   15.10   15.80 
 700 nm   15.00   15.60 
Calculated Relative Intensity Colors of Damaraite in Air
Relative
Intensity
   0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540% 560%
R1                        
R2                        
 

Calculated Properties of Damaraite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.26 gm/cc
note: Specific Gravity of Damaraite =7.67 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.19
Boson Index = 0.81
Help on Photoelectric: Photoelectric: PEDamaraite =1,657.01 barns/electron
U=PEDamaraite x rElectron Density=10368.20 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Damaraite is Not Radioactive
 

Damaraite Classification

Help on  Dana Class: Dana Class: 10.05.10.01 (10)Oxyhalides and Hydroxyhalides
  (10.05)where Am (O,OH)p Xq
  (10.05.10)Dana Group
 
10.05.10.01 Damaraite Pb3O2(OH)Cl Pmc2 mm2
Help on  Strunz Class: Strunz Class: 03.DC.75 03 - HALIDES
  03.D - Oxyhalides, Hydroxyhalides and Related Double Halides
  03.DC -With Pb (As,Sb,Bi), without Cu
 
03.DC.75 Damaraite Pb3O2(OH)Cl Pmc2 mm2
 

Other Damaraite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.77, p671, Vol 87, p 183) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Damaraite :
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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Print or Cut-and-Paste your Damaraite Specimen Label here :

Damaraite

Pb3O2(OH)Cl
Dana No: 10.05.10.01 Strunz No: 03.DC.75
Locality:

 

Notes:

 

 
   
 


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