Mineralogy Database

Dadsonite Mineral Data

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General Dadsonite Information

Help on Chemical  Formula: Chemical Formula: Pb21Sb23S55Cl
Help on Composition: Composition: Molecular Weight = 8,950.53 gm
   Antimony  31.29 %  Sb
   Lead      48.61 %  Pb
   Sulfur    19.70 %  S
   Chlorine   0.40 %  Cl
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb21Sb23S55Cl
Help on Environment: Environment: In hydrothermal veins with other sulfides and lead sulfosalt minerals.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Giant property, Yellowknife, NWT, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Alexander S. Dadson (1906-1958), Canadian mineralogist.
Help on Name Pronunciation: Name Pronunciation: Dadsonite + Pronunciation Say DADSONITE
Help on Synonym: Synonym: IMA1968-011
 

Dadsonite Image

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  Dadsonite

Comments: Gay metallic massive dadsonite.
Location: Wolfsberg, Harzgerode, Sachsen-Anhalt, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Dadsonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =4.635:1:4.2165
Help on Cell Dimensions: Cell Dimensions: a = 19.05, b = 4.11, c = 17.33, Z = 0.5; beta = 96.333° V = 1,348.58 Den(Calc)= 5.51
Help on Crystal System: Crystal System: Monoclinic Space Group: P 2,Pm,P 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.38(1), 2.84(0.7), 3.78(0.7),
 

Physical Properties of Dadsonite

Help on Color: Color: Lead gray, Gray.
Help on Density: Density: 5.68 - 5.76, Average = 5.72
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Dadsonite

Help on RL Anisotrophism: RL Anisotrophism: Distinct to strong, in greenish gray.
Help on RL Color: RL Color: White with a greenish tint, with blood-red internal reflections in oil.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Dadsonite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   44.00   46.60 
   
 420 nm   42.30   45.80 
 440 nm   40.80   45.10 
 460 nm   39.60   44.50 
 480 nm   39.20   44.10 
 500 nm   39.10   44.00 
 520 nm   39.10   44.00 
 540 nm   39.10   43.90 
 560 nm   38.90   43.00 
 580 nm   38.40   42.00 
 600 nm   37.90   41.30 
 620 nm   37.30   40.60 
 640 nm   36.80   39.90 
 660 nm   36.20   39.10 
 680 nm   35.70   38.10 
 700 nm   35.30   37.10 
Calculated Relative Intensity Colors of Dadsonite in Air
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240%
R1                    
R2                    
 

Calculated Properties of Dadsonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.67 gm/cc
note: Specific Gravity of Dadsonite =5.51 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEDadsonite = 990.55 barns/electron
U=PEDadsonite x rElectron Density=4,624.62 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Dadsonite is Not Radioactive
 

Dadsonite Classification

Help on  Dana Class: Dana Class: 03.06.08.01 (03)Sulfides - Sulfosalts
  (03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.06.08)Dana Group
 
03.06.08.01 Dadsonite Pb21Sb23S55Cl P 2,Pm,P 2/m Mono
Help on  Strunz Class: Strunz Class: 02.HC.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HC -With only Pb
 
02.HC.30 Dadsonite Pb21Sb23S55Cl P 2,Pm,P 2/m Mono
 

Other Dadsonite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Dadsonite :
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
15 - WWW-MINCRYST

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Dadsonite

Pb21Sb23S55Cl
Dana No: 03.06.08.01 Strunz No: 02.HC.30
Locality:

 

Notes:

 

 
   
 


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