Mineralogy Database

Criddleite Mineral Data

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General Criddleite Information

Help on Chemical  Formula: Chemical Formula: TlAg2Au3Sb10S10
Help on Composition: Composition: Molecular Weight = 2,549.18 gm
   Thallium   8.02 %  Tl
   Silver     8.46 %  Ag
   Antimony  47.76 %  Sb
   Gold      23.18 %  Au
   Sulfur    12.58 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: TlAg2Au3Sb10S10
Help on Environment: Environment: Primary hydrothermal mineral in a complex gold deposit.
Help on IMA Status: IMA Status: Approved IMA 1988
Help on Locality: Locality: Hemlo gold deposit, near Marathon, Ontario, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Alan J. Criddle (1944-2002), English mineralogist.
Help on Synonym: Synonym: IMA1987-037
 

Criddleite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Criddleite   Aurostibite

Comments: B&W polished section image of criddleite (grey) surrounding and penetrating aurostibite (white) within quartz gangue. (MinMag, v52:691).
Location: Hemlo gold deposit, Hemlo, Ontario, Canada. Scale: See Image.
© Mineralogical Magazine

Criddleite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.4773:1:0.9692
Help on Cell Dimensions: Cell Dimensions: a = 19.96, b = 8.057, c = 7.809, Z = 2; beta = 92.08° V = 1,255.00 Den(Calc)= 6.75
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/m ?
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.813(1), 5.63(0.9), 2.86(0.7),
 

Physical Properties of Criddleite

Help on Color: Color: Black.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Criddleite

Help on Optical Data: Optical Data: NCalc= 1.42 - from Gladstone-Dale relationship (KC = 0.0615) where Ncalc=Dcalc*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Distinct to moderate, from buff to slate gray.
Help on RL Color: RL Color: Gray-blue.
Help on RL Pleochroism: RL Pleochroism: Weak, from gray-blue to slightly greenish gray-blue.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Criddleite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   40.60   41.80 
   
 420 nm   40.10   41.00 
 440 nm   39.40   40.10 
 460 nm   38.60   39.40 
 480 nm   38.10   39.20 
 500 nm   37.60   39.10 
 520 nm   37.30   38.90 
 540 nm   36.70   38.40 
 560 nm   36.10   38.00 
 580 nm   35.60   37.60 
 600 nm   35.00   37.20 
 620 nm   34.40   36.60 
 640 nm   33.70   36.00 
 660 nm   33.10   35.30 
 680 nm   32.60   34.60 
 700 nm   32.50   34.10 
Calculated Relative Intensity Colors of Criddleite in Air
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 260%
R1                      
R2                      
 

Calculated Properties of Criddleite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.73 gm/cc
note: Specific Gravity of Criddleite =6.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0009434213
Boson Index = 0.9990565787
Help on Photoelectric: Photoelectric: PECriddleite = 699.30 barns/electron
U=PECriddleite x rElectron Density=4,007.03 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Criddleite is Not Radioactive
 

Criddleite Classification

Help on  Dana Class: Dana Class: 03.09.01.01 (03)Sulfides - Sulfosalts
  (03.09)where z/y = 1 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.09.01)Dana Group
 
03.09.01.01 Criddleite TlAg2Au3Sb10S10 A2/m ? 2/m
Help on  Strunz Class: Strunz Class: 02.LA.25 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.L - Unclassified Sulfosalts
  02.LA -Without essential Pb
 
02.LA.25 Criddleite TlAg2Au3Sb10S10 A2/m ? 2/m
 

Other Criddleite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.75,p706-713,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Criddleite :
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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Criddleite

TlAg2Au3Sb10S10
Dana No: 03.09.01.01 Strunz No: 02.LA.25
Locality:

 

Notes:

 

 
   
 


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