Catamarcaite
| Catamarcaite | |
|---|---|
| General and classification | |
| other names |
IMA 2003-020 |
| chemical formula | Cu 6 GeWS 8 |
|
Mineral class (and possibly department) |
Sulfides and sulfosalts |
|
System no. to Strunz and to Dana |
2.CB.35b ( 8th edition : II / C.09) 02.09.14.02 |
| Crystallographic Data | |
| Crystal system | hexagonal |
| Crystal class ; symbol | 6 mm |
| Space group | P 6 3 mc |
| Lattice parameters | a = 7.524 Å ; c = 12.39 Å Please complete the source as an individual reference |
| Formula units | Z = 2 Please complete the source as an individual reference |
| Physical Properties | |
| Mohs hardness | 3.5 |
| Density (g / cm 3 ) | 4.892 |
| Cleavage | Please complete |
| colour | Gray |
| Line color | Please complete |
| transparency | opaque |
| shine | metallic |
Catamarcaite is a very rarely occurring mineral from the mineral class of sulfides and sulfosalts . It crystallizes in the hexagonal crystal system with the chemical composition Cu 6 GeWS 8 and forms thin margins and up to one millimeter large, gray aggregates on chalcosine and bornite ores .
Etymology and history
The mineral was first found in 2003 by Hubert Putz, Werner H. Paar, Dan Topa, Emil Makovicky and Andrew C. Roberts in sample material from the La Rosario vein of the Capillitas mine in the Argentine province of Catamarca . They named it after the province in which it was found.
classification
In Strunz's system , catamarcaite is counted among the metal sulfides with a ratio of metal to sulfur, selenium or tellurium of 1: 1. In the 9th edition , it forms a subgroup of sulphides with zinc , iron , copper or silver with Vinciennite , Hemusite , Kiddcreekite , Morozeviczit , Polkovicit and Renierite .
In the Dana systematics , it forms with Idait a subgroup of sulfides, selenides and tellurides with a general formula A m B n X p and a ratio of (m + n) to p of 1: 1.
Education and Locations
Catamarcaite is formed in epithermal ores containing bornite. It is associated with Bornite , Digenite , Chalkosin , Covellin , Sphalerite , Huebnerite , Luzonite , Wittichenite , germanium-containing sulphides such as Putzite and quartz .
So far only the type locality is known as the location.
Crystal structure
Catamarcaite crystallizes in the hexagonal crystal system in the space group P 6 3 mc with the lattice parameters a = 7.524 Å and c = 12.39 Å as well as two formula units per unit cell .
See also
Individual evidence
literature
- Hubert Putz, Werner H. Paar, Dan Topa, Emil Makovicky and Andrew C. Roberts: Catamarcaite, Cu 6 GeWS 8 , a new species of germanium – tungsten sulfide from Capillitas, Catamarca, Argentina: description, paragenesis and crystal structure. In: Canadian Mineralogist. 2006, 44, 6, pp. 1481-1497, doi : 10.2113 / gscanmin . 44.6.1481 .