Canfieldite Mineral Data + Say CANFIELDITE


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General Canfieldite Information

Help on Chemical  Formula: Chemical Formula: Ag8SnS6
Help on Composition: Composition: Molecular Weight = 1,174.05 gm
   Silver  73.50 %  Ag
   Tin     10.11 %  Sn
   Sulfur  16.39 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: Ag8SnS6
Help on Environment: Environment: Forms a series with argyrodite,
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1894
Help on Locality: Locality: Aullagas near Chayanta, northwest of Colquechaca, Bolivia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Frederick A. Canfield (1849-1926), American mining engineer and mineral collector.
Help on Synonym: Synonym: ICSD 42533
  PDF 38-434
 

Canfieldite Image

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Canfieldite

Comments: Dull, black pseudo-octahedral crystals of canfieldite.
Location: Gallofa vein, Colquechaca, Chayanta, Potosi, Bolivia. Scale: Crystal size 2 cm.
© Dave Barthelmy

Canfieldite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.0267:1:1.4174
Help on Cell Dimensions: Cell Dimensions: a = 15.298, b = 7.548, c = 10.699, Z = 4; V = 1,235.41 Den(Calc)= 6.31
Help on Crystal System: Crystal System: Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P na21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.02(1), 1.863(0.5), 2.66(0.4),
Help on Forms: Forms:

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Help on Above

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

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Physical Properties of Canfieldite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 6.28
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Pseudo Cubic - Crystals show a cubic outline.
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Metallic
Help on Streak: Streak: grayish black
 

Optical Properties of Canfieldite

Help on RL Color: RL Color: Gray white with violet tint.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Canfieldite in Air
λ R  ∑ R(λ) 
 400 nm   29.70   
 420 nm   28.60 
 440 nm   27.50 
 460 nm   26.70 
 480 nm   26.10 
 500 nm   25.60 
 520 nm   25.30 
 540 nm   25.10 
 560 nm   24.90 
 580 nm   24.80 
 600 nm   24.90 
 620 nm   25.00 
 640 nm   25.10 
 660 nm   25.20 
 680 nm   25.20 
 700 nm   25.20 
Calculated Relative Intensity Colors of Canfieldite in Air
Relative
Intensity
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 350%
R                      
 

Calculated Properties of Canfieldite

Help on Electron Density: Electron Density:

relectron=5.61 gm/cc
note: rCanfieldite =6.31 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01803
Boson Index = 0.98197
Help on Photoelectric: Photoelectric:

PECanfieldite = 220.66 barns/electron
U=PECanfieldite x relectron=1,238.14 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Canfieldite is Not Radioactive

 

Canfieldite Classification

Help on  Dana Class: Dana Class: 2.5.6.2 (2)Sulfides - Including Selenides and Tellurides
  (2.5)where Am Bn Xp, with (m+n):p=3:2
  (2.5.6)Dana Group
 
2.5.6.1 Argyrodite Ag8GeS6 Pna2 mm2
 
2.5.6.2 Canfieldite Ag8SnS6 P na21 mm2
Help on  Strunz Class: Strunz Class: II/B.08-20 II - Sulfides and sulphosalts
  II/B - Sulfides with metal: sulfur, selenium and tellurium > 1:1, Sulfides, Selenides and Tellurides with predominant Copper and Silver/Gold
  II/B.08 - Argyrodite - Canfieldite series
 
II/B.08-05 Putzite! (Cu4.7Ag3.3)GeS6 F43m 4 3m
 
II/B.08-10 Argyrodite Ag8GeS6 Pna2 mm2
 
II/B.08-20 Canfieldite Ag8SnS6 P na21 mm2
 

Other Canfieldite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Canfieldite :
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 -École des Mines de Paris

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Print or Cut-and-Paste your Canfieldite Specimen Label here :

Canfieldite

Ag8SnS6
Dana No: 2.5.6.2 Strunz No: II/B.08-20
Locality:

 

Notes:

 

 
   
 
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