Mineralogy Database

Yarrowite Mineral Data

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General Yarrowite Information

Help on Chemical  Formula: Chemical Formula: Cu9S8
Help on Composition: Composition: Molecular Weight = 828.44 gm
   Copper  69.03 %  Cu
   Sulfur  30.97 %  S
          100.00 % 
Help on Empirical Formula: Empirical Formula: Cu9S8
Help on Environment: Environment: As weathering-produced lamellar replacements of other copper sulfides in stratabound re-bed copper deposits (Yarrow and Spionkop Creeks, Canada).
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Yarrow Creek, southwestern Alberta, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Yarrowite + Pronunciation Say YARROWITE
Help on Synonym: Synonym: IMA1978-022

Yarrowite Image

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  Spionkopite   Yarrowite

Comments: Blue-black metallic granular spionkopite, intermixed with yarrowite altering, with quartz.
Location: Yarrow Creek, Alberta, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Yarrowite   Spionkopite

Comments: Blue-gray metallic yarrowite grains in granular quartz rock with spionkopite.
Location: Yarrow Creek, Alberta, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Yarrowite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:17.7
Help on Cell Dimensions: Cell Dimensions: a = 3.8, c = 67.26, Z = 3; V = 841.11 Den(Calc)= 4.91
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: P 3m1 ?
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.899(1), 3.061(0.55), 2.767(0.35),

Physical Properties of Yarrowite

Help on Cleavage: Cleavage: {0001} Distinct
Help on Color: Color: Black, Blue.
Help on Density: Density: 4.89
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Stellate - Occurs as spherical, radial aggregates radiating from a "star" like point.
Help on Habit: Habit: Tarnishes - Freshly fractured surfaces form a surface oxidation film
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Metallic

Optical Properties of Yarrowite

Help on RL Anisotrophism: RL Anisotrophism: Strong, orange-red.
Help on RL Color: RL Color: Blue, blue with a slight violet tint in oil.
Help on RL Pleochroism: RL Pleochroism: Blue to bluish white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Yarrowite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   19.20   32.90 
 420 nm   18.60   32.30 
 440 nm   17.90   31.40 
 460 nm   16.90   30.50 
 480 nm   15.60   29.50 
 500 nm   14.20   28.20 
 520 nm   12.40   27.00 
 540 nm   10.70   25.60 
 560 nm    9.08   24.30 
 580 nm    7.51   23.10 
 600 nm    6.15   22.20 
 620 nm    5.02   22.20 
 640 nm    4.33   23.00 
 660 nm    4.38   23.60 
 680 nm    5.96   23.40 
 700 nm    9.44   23.00 
Calculated Relative Intensity Colors of Yarrowite in Air
   0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 1000%

Calculated Properties of Yarrowite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.61 gm/cc
note: Specific Gravity of Yarrowite =4.91 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0023223835
Boson Index = 0.9976776165
Help on Photoelectric: Photoelectric: PEYarrowite = 32.63 barns/electron
U=PEYarrowite x rElectron Density= 150.45 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yarrowite is Not Radioactive

Yarrowite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.07)where Am Bn Xp, with (m+n):p=9:8
  (02.07.03)Dana Group Yarrowite Cu9S8 P 3m1 ? 3m
Help on  Strunz Class: Strunz Class: 02.CA.05d 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.C - Metal Sulfides, M:S = 1:1 (and similar)
  02.CA -With Cu
02.CA.05d Yarrowite Cu9S8 P 3m1 ? 3m

Other Yarrowite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Yarrowite :
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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Dana No: Strunz No: 02.CA.05d





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