Klockmannite
A valid IMA mineral species - grandfathered
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About Klockmannite
Friedrich F. H. Klockmann
Formula:
CuSe
Colour:
Gray-black to black. May tarnish to blue-black.
Lustre:
Metallic, Sub-Metallic
Hardness:
2 - 2½
Specific Gravity:
5.99
Crystal System:
Hexagonal
Name:
Named in honor of Friedrich Ferdinand Hermann Klockmann (12 April 1858, Schwerin, Germany - 17 November 1937, Aachen, Germany), mineralogist Technical High School, Aachen, Germany.
The Se analogue of covellite. The Cu analogue of achávalite, freboldite, and sederholmite.
Three structural modifications are analyzed by Milman (2002). Unstable under compression (will decompose to umangite and krut'aite).
Three structural modifications are analyzed by Milman (2002). Unstable under compression (will decompose to umangite and krut'aite).
Unique Identifiers
Mindat ID:
2226
Long-form identifier:
mindat:1:1:2226:8
GUID
(UUID V4):
(UUID V4):
0bd9399f-f0bc-4815-85b6-3a26defa4fcc
IMA Classification of Klockmannite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Cu5.2Se6
First published:
1928
Classification of Klockmannite
2.CA.05b
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
A : With Cu
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
A : With Cu
2.8.12.2
2 : SULFIDES
8 : AmXp, with m:p = 1:1
2 : SULFIDES
8 : AmXp, with m:p = 1:1
3.1.14
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
1 : Sulphides etc. of Cu
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
1 : Sulphides etc. of Cu
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Kl | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Kl | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Klockmannite
Metallic, Sub-Metallic
Transparency:
Opaque
Colour:
Gray-black to black. May tarnish to blue-black.
Comment:
Metallic luster when freshly exposed. May become dull.
Streak:
Gray to black
Hardness:
2 - 2½ on Mohs scale
Cleavage:
Perfect
{0001}
{0001}
Density:
5.99 g/cm3 (Measured) 6.12 g/cm3 (Calculated)
Optical Data of Klockmannite
Anisotropism:
Strong; brownish gray to gray-white
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 16.2% | 38.9% |
| 420nm | 16.6% | 40.2% |
| 440nm | 16.9% | 40.8% |
| 460nm | 17.0% | 40.6% |
| 480nm | 17.0% | 40.2% |
| 500nm | 17.0% | 39.6% |
| 520nm | 16.8% | 38.9% |
| 540nm | 16.4% | 38.0% |
| 560nm | 15.8% | 37.0% |
| 580nm | 15.0% | 36.0% |
| 600nm | 14.3% | 34.7% |
| 620nm | 13.9% | 33.6% |
| 640nm | 13.9% | 32.5% |
| 660nm | 14.5% | 31.5% |
| 680nm | 15.8% | 30.5% |
| 700nm | 17.7% | 29.9% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 40.8%.
R1 shown in black, R2 shown in red
Chemistry of Klockmannite
Mindat Formula:
CuSe
Elements listed:
Common Impurities:
Ag
Crystallography of Klockmannite
Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mmc
Setting:
P63/mmc
Cell Parameters:
a = 3.94 Å, c = 17.25 Å
Ratio:
a:c = 1 : 4.378
Unit Cell V:
231.91 ų (Calculated from Unit Cell)
Z:
6
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000066 | Klockmannite | Berry L G (1954) The crystal structure of covellite, CuS and klockmannite, CuSe American Mineralogist 39 504-509 |  | 1954 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.35 Å | (60) |
| 3.18 Å | (90) |
| 2.94 Å | (10) |
| 2.88 Å | (100) |
| 2.19 Å | (30) |
| 2.15 Å | (4) |
| 2.00 Å | (40) |
| 1.967 Å | (80) |
| 1.913 Å | (4) |
| 1.819 Å | (60) |
| 1.785 Å | (4) |
| 1.698 Å | (10) |
| 1.676 Å | (10) |
| 1.622 Å | (50) |
| 1.537 Å | (6) |
| 1.471 Å | (6) |
| 1.439 Å | (6) |
| 1.423 Å | (6) |
| 1.401 Å | (10) |
| 1.334 Å | (30) |
| 1.287 Å | (6) |
| 1.278 Å | (10) |
| 1.258 Å | (4) |
| 1.235 Å | (4) |
| 1.208 Å | (4) |
| 1.176 Å | (6) |
| 1.158 Å | (40) |
| 1.138 Å | (20) |
| 1.105 Å | (30) |
| 1.0855 Å | (6) |
| 1.0780 Å | (6) |
| 1.0550 Å | (10) |
| 0.9990 Å | (30) |
| 0.9840 Å | (10) |
| 0.9790 Å | (6) |
| 0.9460 Å | (30) |
| 0.9320 Å | (6) |
Comments:
ICDD 6-427
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-𝑇 alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Klockmannite
Place of Conservation of Type Material:
n.d.
Associated Minerals at Type Locality:
Reference:
Ramdohr, P. (1928) Klockmannit, ein neues natürliches kupferselenid. Centralblatt für Mineralogie, Geologie und Paläontologie: 1928: 225-232.
Other Language Names for Klockmannite
Common Associates
Associated Minerals Based on Photo Data:
| 94 photos of Klockmannite associated with Clausthalite | PbSe |
| 59 photos of Klockmannite associated with Krut'aite | CuSe2 |
| 40 photos of Klockmannite associated with Umangite | Cu3Se2 |
| 37 photos of Klockmannite associated with Penroseite | (Ni,Co,Cu)Se2 |
| 30 photos of Klockmannite associated with Petrovicite | Cu3HgPbBiSe5 |
| 28 photos of Klockmannite associated with Calcite | CaCO3 |
| 27 photos of Klockmannite associated with Quijarroite | Cu6HgPb2Bi4Se12 |
| 25 photos of Klockmannite associated with Eldragónite | Cu6BiSe4(Se2) |
| 15 photos of Klockmannite associated with Hansblockite | (Cu,Hg)(Bi,Pb)Se2 |
| 13 photos of Klockmannite associated with Cerromojonite | CuPbBiSe3 |
Related Minerals - Strunz-mindat Grouping
| 2.CA.05a | Covellite | CuS |
| 2.CA.05c | Spionkopite | Cu39S28 |
| 2.CA.05d | Yarrowite | Cu9S8 |
| 2.CA.10 | Nukundamite | Cu3.33Fe0.66S4 |
| 2.CA.15 | Calvertite | Cu5Ge0.5S4 |
| 2.CA.20 | Erazoite | Cu4SnS6 |
| 2.CA.25 | Grokhovskyite | CuCrS2 |
Fluorescence of Klockmannite
Not fluorescent in UV
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Klockmannite
mindat.org URL:
https://www.mindat.org/min-2226.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Klockmannite
Localities for Klockmannite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Argentina | |
| Paar (1996) |
| M.K. de Brodtkorb (ed.) |
| Anthony et al. (1990) | |
| Paar et al. (2004) |
| Economic Geology (1997) |
| Grundmann et al. (2018) | |
| de Brodtkorb et al. (2010) +1 other reference | |
| Milka K. de BRODTKORB and Sabrina CROSTA (2010) +1 other reference | |
| DE BRODTKORB +3 other references |
| Milka K. de BRODTKORB and Sabrina CROSTA (2010) | |
| Grundmann et al. (2018) | |
| Milka K. de Brodtkorb (2002) +3 other references | |
| Ramdohr (1928) +2 other references | |
| Recursos Minerales de la Republica ... +3 other references | |
| Anthony et al. (1990) +2 other references |
| Ahlfeld Friedrich and Angelelll ... +1 other reference |
Australia | |
| Segnit +1 other reference |
Austria | |
| Kolitsch (2014) |
Bolivia | |
| doi:10.3390/min7050068 +2 other references |
Brazil | |
| Berni et al. (2016) |
Canada | |
| Sparkes et al. (2016) |
| Richard Gunter Collection |
| J. A. Mandarino (1965) |
| ontariominerals.com +1 other reference |
| Sabina (2003) |
| Can Min 10:787-796 +1 other reference |
| J. Traill (1952) | |
| ROBINSON et al. (1952) |
| Tremblay (1978) +1 other reference | |
| Anthony et al. (1990) +1 other reference | |
Chile | |
| Atlas of Ore Minerals (1982) |
China | |
| Caixia Feng et al. (2002) +3 other references |
| Jiayong Pan et al. (2009) |
| Zhi Li et al. (1973) +1 other reference |
Czech Republic | |
| Škácha et al. (2017) |
| Kopecký et al. (2010) |
| Sejkora et al. (2012) +1 other reference |
| Anthony et al. (1990) +1 other reference |
| Kvaček +1 other reference |
| Kvaček +1 other reference | |
| Vavřín +1 other reference |
| Anthony et al. (1990) +1 other reference | |
| Kvaček | |
DR Congo | |
| Econ Geol (1997) |
Finland | |
| en.gtk.fi (2010) |
France | |
| Agrinier et al. (1967) |
| Hohl: "Minéraux et Mines du Massif Vosgien" (Mulhouse) |
| Econ Geol (1997) |
Germany | |
| Walenta (1992) |
| DILL et al. (1986) +1 other reference |
| Dill et al. (2010) |
| Kopp et al. (2012) |
| Wittern (2001) |
| Cabral et al. (2018) |
| Koch et al. (2018) |
| Weiß (1990) |
| Weiß (1990) |
| Heider (2014) |
| Schaarschmidt (2007) +1 other reference |
| Tischendorf (1969) +1 other reference |
| Forster et al. (2004) |
| Forster et al. (2004) |
| T. Witzke & F. Rüger: Lapis 1998 (7/8) |
Kazakhstan | |
| Lobanov et al. (2012) |
Kenya | |
| Waweru (2020) |
Mexico | |
| Panczner (1987) +3 other references |
Poland | |
| Pringle et al. (1980) +3 other references |
| Galuskin E. & Szełęg E. 2003: The first finding of Ag-amalgamates in rodingites (Nasławice, Lower Silesia, Poland) |
Romania | |
| Popescu et al. (2010) |
Russia | |
| Distler et al. (2005) |
| Kalinin (2021) |
| Кокорин et al. (2000) |
| Safonov et al. (2003) |
Sweden | |
| Econ Geol (1997) +1 other reference |
| |
Switzerland | |
| Stalder et al. (1998) |
Tajikistan | |
| Badalov et al. (1975) |
UK | |
| Stanley et al. (1990) +1 other reference |
Zambia | |
| Southwood et al. (2019) |
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Bukov Mine, Rožná deposit, Rožná, Žďár nad Sázavou District, Vysočina Region, Czech Republic