Belendorffite
A valid IMA mineral species
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About Belendorffite
Formula:
Cu7Hg6
Colour:
Silvery
Lustre:
Metallic
Hardness:
2½ - 4
Specific Gravity:
13.2
Crystal System:
Trigonal
Name:
Named in honor of Klaus Belendorff (1956– ), mineral collector from Münster, Germany, who discovered the mineral.
Type Locality:
Dimorph of:
This page provides mineralogical data about Belendorffite.
Unique Identifiers
Mindat ID:
608
Long-form identifier:
mindat:1:1:608:2
GUID
(UUID V4):
(UUID V4):
1b7fcafb-30cb-4f62-a669-600344cb077e
IMA Classification of Belendorffite
Approved
First published:
1992
Classification of Belendorffite
1.AD.10
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
D : Mercury-amalgam family
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
D : Mercury-amalgam family
Dana 7th ed.:
1.1.13.2
1.1.9.2
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Bdf | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Belendorffite
Metallic
Transparency:
Opaque
Colour:
Silvery
Comment:
Tarnishing rapidly to blackish brown
Streak:
Silvery
Hardness:
2½ - 4 on Mohs scale
Hardness:
VHN4=340(8) kg/mm2 - Vickers
Tenacity:
Brittle
Density:
13.2(1) g/cm3 (Measured) 13.15 g/cm3 (Calculated)
Optical Data of Belendorffite
Anisotropism:
Very weak.
Reflectivity:
Wavelength | R |
---|---|
400nm | 66.2% |
420nm | 67.0% |
440nm | 67.6% |
460nm | 68.3% |
480nm | 69.7% |
500nm | 70.2% |
520nm | 71.0% |
540nm | 71.9% |
560nm | 72.8% |
580nm | 73.4% |
600nm | 74.1% |
620nm | 74.7% |
640nm | 75.3% |
660nm | 76.0% |
680nm | 76.4% |
700nm | 76.9% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 76.9%.
Colour in reflected light:
tin white; bright white with a yellowish tint
Chemistry of Belendorffite
Mindat Formula:
Cu7Hg6
Elements listed:
Crystallography of Belendorffite
Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Cell Parameters:
a = 9.4024(4) Å
Unit Cell V:
0.00 ų (Calculated from Unit Cell)
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) |
---|---|---|---|---|---|---|---|
0011912 | Belendorffite | Lindahl T, Westman S (1969) The structure of the rhombohedral gamma brass like phase in the copper-mercury system Acta Chemica Scandinavica 23 1181-1190 | 1969 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.523 Å | (100) |
2.227 Å | (100) |
2.221 Å | (100) |
2.208 Å | (100) |
2.983 Å | (80) |
2.966 Å | (80) |
6.68 Å | (60) |
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 Belendorffite
General Appearance of Type Material:
Massive
Place of Conservation of Type Material:
Institute for Mineralogy, Ruhr University, Bochum, Germany
Associated Minerals at Type Locality:
Reference:
Bernhardt, H.-J. and K. Schmetzer (1992) Belendorffite, a new copper amalgam dimorphous with kolymite. Neues Jahrbuch für Mineralogie, Monatshefte: 1992: 21–28.
Synonyms of Belendorffite
Other Language Names for Belendorffite
German:Belendorffit
Spanish:Belendorffita
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
1.AD. | Aurihydrargyrumite | Au6Hg5 |
1.AD.05 | Mercury | Hg |
1.AD.10 | Kolymite | Cu7Hg6 |
1.AD.15c | Eugenite | Ag11Hg2 |
1.AD.15b | Luanheite | Ag3Hg |
1.AD.15d | Moschellandsbergite | Ag2Hg3 |
1.AD.15a | Paraschachnerite | Ag3Hg2 |
1.AD.15a | Schachnerite | Ag1.1Hg0.9 |
1.AD.20a | Weishanite | (Au,Ag,Hg) |
1.AD.20b | Goldamalgam (of Chen et al.) | (Au,Ag)Hg |
1.AD.20c | Yiyangite | Au3Hg |
1.AD.25 | Potarite | PdHg |
1.AD.30 | Leadamalgam | Pb0.7Hg0.3 |
1.AD.35 | Shosanbetsuite | Ag3Sn |
1.AD.40 | Unnamed (Au2Hg) | Au2Hg |
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 Belendorffite
mindat.org URL:
https://www.mindat.org/min-608.html
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Please feel free to link to this page.
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References for Belendorffite
Reference List:
Localities for Belendorffite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Germany (TL) | |
| Bernhardt (1992) +1 other reference |
Hungary | |
| www.minerals- of-the- carpathians.eu (Editor:Szakáll) |
GEODA 2010/1 +1 other reference | |
Peter Kolesar / Rolf Luetcke specimen +1 other reference |
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Landsberg, Obermoschel, Nordpfälzer Land, Donnersbergkreis, Rhineland-Palatinate, Germany