Klockmannite Mineral Data

General Klockmannite Information

Chemical Formula:

CuSe

Composition:

Molecular Weight = 142.51 gm

Copper 44.59 % Cu

Selenium 55.41 % Se

______

100.00 %

Empirical Formula:

CuSe

Environment:

Of hydrothermal origin.

IMA Status:

Valid Species (Pre-IMA) 1928

Locality:

Sierra de Umango, La Rioja province, Argentina. Link to MinDat.org Location Data.

Name Origin:

Named for Friedrich Klockmann (1857-1937), German mineralogist of Aachen.

Name Pronunciation:

Klockmannite + Pronunciation

Synonym:

ICSD 82331

PDF 34-171

Klockmannite Image

Images:

Klockmannite

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

Images:

Klockmannite Fischesserite

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

Axial Ratios:

a:c = 1:4.38039

Cell Dimensions:

a = 3.938, c = 17.25, Z = 6; V = 231.67 Den(Calc)= 6.13

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.88(1), 3.18(0.9), 1.967(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
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Berry L G , American Mineralogist , 39 (1954) p.504-509, The crystal structure of covellite, CuS and klockmannite, CuSe

Physical Properties of Klockmannite

Cleavage:

{0001} Perfect

Color:

Blue black, Grayish black, Dark gray.

Density:

5.99

Diaphaneity:

Opaque

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Metallic - Dull

Optical Properties of Klockmannite

RL Anisotrophism:

Strong, brownish gray to gray-white.

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**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	540%	580%
R₁
R₂

Calculated Properties of Klockmannite

Electron Density:

Bulk Density (Electron Density)=5.42 gm/cc
note: Specific Gravity of Klockmannite =6.13 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Klockmannite= 65.16 barns/electron
U=PE_Klockmannite x rElectron Density= 353.17 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Klockmannite is Not Radioactive

Klockmannite Classification

Dana Class:

02.08.12.02 (02)Sulfides - Including Selenides and Tellurides

(02.08)where Am Bn Xp, with (m+n):p=1:1

(02.08.12)Covellite Group

02.08.12.01 Covellite CuS P 6₃/mmc 6/m 2/m 2/m

02.08.12.02 Klockmannite CuSe P 6₃/mmc 6/m 2/m 2/m

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

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

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
15 - WWW-MINCRYST

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Ask about Klockmannite here :
Ask-A-Mineralogist from the Mineralogical Society of America
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Print or Cut-and-Paste your Klockmannite Specimen Label here :

Klockmannite

CuSe
Dana No: 02.08.12.02 Strunz No: 02.CA.05b
Locality:

Notes: