Belendorffit
| Belendorffit | |
|---|---|
| General and classification | |
| other names |
IMA 1989-024 |
| chemical formula | Cu 7 Hg 6 |
|
Mineral class (and possibly department) |
Elements - metals and intermetallic alloys |
|
System no. to Strunz and to Dana |
1.AD.10 ( 8th edition : I / A.02) 01.01.09.02 |
| Similar minerals | dimorph with Kolymite |
| Crystallographic Data | |
| Crystal system | trigonal |
| Crystal class ; symbol | 3 m |
| Space group | R 3 m |
| Lattice parameters | a = 9.402 Å, α = 90.5 °; Please complete the source as an individual reference |
| Formula units | Z = 4 Please complete the source as an individual reference |
| Physical Properties | |
| Mohs hardness | 3 to 3.5 |
| Density (g / cm 3 ) | 13.2 |
| Cleavage | Please complete |
| colour | silver-white, quickly turning black-brown |
| Line color | silvery white |
| transparency | opaque |
| shine | metallic |
Belendorffit is a very rare mineral from the mineral class of elements, more precisely metals and intermetallic compounds. It crystallizes in the trigonal crystal system with the chemical composition Cu 7 Hg 6 and forms massive nuggets .
Etymology and history
Belendorffit was first found in 1992 by Klaus Belendorff in the type locality , the Moschellandsberg near Obermoschel in Rhineland-Palatinate ( Germany ). It is named after its discoverer.
classification
In the Strunz system , Belendorffit is counted among the metals and intermetallic compounds, a subgroup of the elements. After the 8th edition , it forms a group with lead amalgam , eugenite , gold amalgam , kolymite , luanheit , moschellandsbergite , paraschachnerite , potarite , mercury , schachnerite and weishanite . In the 9th edition it forms a subgroup of the mercury amalgam family with kolymite.
In the Dana systematics , it forms a subgroup with Kolymite (copper amalgam alloys of the metallic elements except for the platinum metals ).
Education and Locations
Belendorffit can be found in mercury deposits; it is also associated with mercury.
So far (status: 2010) the mineral could only be detected in the two Hungarian mines "Adolf" and "Andrássy I." near Rudabánya, apart from its type locality in Moschellandsberg in Germany .
Crystal structure
Belendorffit crystallizes in the trigonal crystal system in the space group R 3 m with the lattice parameters a = 9.402 Å and α = 90.5 ° and four formula units per unit cell .
See also
Individual evidence
- ^ The New IMA List of Mineral Names. (PDF; 1.5 MB). 2012.
- ^ Minerals Arranged by the New Dana Classification.
literature
- Belendorffite. In: Anthony et al.: Handbook of Mineralogy. 1990, 1, 101 ( PDF ).
Web links
- Mineral Atlas: Belendorffit
- Belendorffite. At: mindat.org. (Engl.).