Mineralogy Database

Klockmannite Mineral Data

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General Klockmannite Information

Help on Chemical  Formula: Chemical Formula: CuSe
Help on Composition: Composition: Molecular Weight = 142.51 gm
   Copper    44.59 %  Cu
   Selenium  55.41 %  Se
            100.00 % 
Help on Empirical Formula: Empirical Formula: CuSe
Help on Environment: Environment: Of hydrothermal origin.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1928
Help on Locality: Locality: Sierra de Umango, La Rioja province, Argentina. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Friedrich Klockmann (1857-1937), German mineralogist of Aachen.
Help on Name Pronunciation: Name Pronunciation: Klockmannite + Pronunciation Say KLOCKMANNITE
Help on Synonym: Synonym: ICSD 82331
  PDF 34-171

Klockmannite Image

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Comments: Klockmannite intergrown with covellite on quartz.
Location: Lichtenberg Mine, Ronneburg U Deposit, Gera district, Thuringia, Germany. Scale: Picture size 7.5 mm.
© Thomas Witzke / Abraxas-Verlag

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  Fischesserite   Klockmannite

Comments: Pinkish-grey fischesserite (Fl) with fine-grained bluish-grey klockmannite (Kl) and grey clausthalite (Cl). Polished section from microprobe analysis in reflected light, parallel nicols.
Location: Predborice, Bohemia, Czech Republic. Scale: Picture size 0.7 mm.
© Thomas Witzke

Klockmannite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:4.38039
Help on Cell Dimensions: Cell Dimensions: a = 3.938, c = 17.25, Z = 6; V = 231.67 Den(Calc)= 6.13
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.88(1), 3.18(0.9), 1.967(0.8),

Physical Properties of Klockmannite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Blue black, Grayish black, Dark gray.
Help on Density: Density: 5.99
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Metallic - Dull

Optical Properties of Klockmannite

Help on RL Anisotrophism: RL Anisotrophism: Strong, brownish gray to gray-white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Klockmannite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   17.20   43.70 
 420 nm   17.20   42.80 
 440 nm   17.20   41.90 
 460 nm   17.00   41.00 
 480 nm   16.90   40.00 
 500 nm   16.60   39.20 
 520 nm   16.20   38.30 
 540 nm   15.80   37.40 
 560 nm   15.10   36.60 
 580 nm   14.40   35.80 
 600 nm   13.80   35.00 
 620 nm   13.60   34.20 
 640 nm   13.80   33.20 
 660 nm   14.70   32.40 
 680 nm   16.20   31.60 
 700 nm   18.80   30.80 
Calculated Relative Intensity Colors of Klockmannite in Air
   0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540% 580%

Calculated Properties of Klockmannite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.42 gm/cc
note: Specific Gravity of Klockmannite =6.13 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEKlockmannite = 65.16 barns/electron
U=PEKlockmannite x rElectron Density= 353.17 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Klockmannite is Not Radioactive

Klockmannite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.08)where Am Bn Xp, with (m+n):p=1:1
  (02.08.12)Covellite Group Covellite CuS P 63/mmc 6/m 2/m 2/m Klockmannite CuSe P 63/mmc 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.CA.05b 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.05b Klockmannite CuSe P 63/mmc 6/m 2/m 2/m

Other Klockmannite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Klockmannite :
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.05b





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