Kolymite
| Kolymite | |
|---|---|
| General and classification | |
| 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) 1.1.9.1 |
| Crystallographic Data | |
| Crystal system | cubic |
| Crystal class ; symbol | 3 3 m |
| Space group | I 4 3 m |
| Lattice parameters | a = 9.42 Å Please complete the source as an individual reference |
| Formula units | Z = 4 Please complete the source as an individual reference |
| Physical Properties | |
| Mohs hardness | 4th |
| Density (g / cm 3 ) | 13.1 |
| Cleavage | Please complete |
| colour | tin-white, quickly turning black-brown |
| Line color | Please complete |
| transparency | opaque |
| shine | metallic |
Kolymite is a very rare mineral from the mineral class of the elements, more precisely the metals and intermetallic compounds. It crystallizes in the cubic crystal system with the chemical composition Cu 7 Hg 6 and forms cuboctahedral crystals of up to 5 μm in size or is fused with copper in aggregates .
Etymology and history
Kolymit was first discovered in 1981 by EA Markova, NM Chernitsova, Y u. S. Borodaev, LS Dubakina and OE Yushko-Zaldrarova in the type locality , the Krokhalin- antimony -Lagerstätte in the region of Magadan in Russia found. The mineral is named after the Kolyma river on which the type locality is located.
classification
In the Strunz system , kolymite is counted among the metals and intermetallic compounds, a subgroup of the elements. After the 8th edition , together with belendorffite , lead amalgam , eugenite , gold amalgam , luanheit , moschellandsbergite , paraschachnerite , potarite , mercury , schachnerite and weishanite, one group. In the 9th edition it forms a subgroup of the mercury amalgam family with Belendorffit.
In the Dana system , it forms with Belendorffit a subgroup (copper-amalgam alloys) of the metallic elements apart from the platinum metals .
Education and Locations
Kolymite was found in the heavy metal fraction of concentrates obtained from the mining of antimony ores. It is associated with copper , stibnite , berthierite , pyrite , arsenopyrite and quartz . In addition to the type locality, other finds are known from the vicinity of Copiapó in Chile , Rudabánya in Hungary and Virginia City in the US state of Nevada .
Crystal structure
Kolymite crystallizes in the cubic crystal system in the space group with the lattice parameter a = 9.42 Å , as well as four formula units per unit cell .
See also
Individual evidence
literature
- Kolymit in: Anthony et al .: Handbook of Mineralogy , 1990, 1, 101 ( pdf )