Stibiocolusite
| Stibiocolusite | |
|---|---|
| General and classification | |
| other names |
IMA 1991-043 |
| chemical formula | Cu 26 V 2 (Sb, Sn, As) 6 S 32 |
|
Mineral class (and possibly department) |
Sulfides and sulfosalts |
|
System no. to Strunz and to Dana |
2.CB.30 ( 8th edition : II / C.10) 01/03/01/04 |
| Crystallographic Data | |
| Crystal system | cubic |
| Crystal class ; symbol | 4 3 m |
| Space group | P 4 3 n |
| Lattice parameters | a = 10.705 Å Please complete the source as an individual reference |
| Formula units | Z = 1 Please complete the source as an individual reference |
| Physical Properties | |
| Mohs hardness | 4 to 4.5 |
| Density (g / cm 3 ) | 4.66 |
| Cleavage | Please complete |
| Break ; Tenacity | shell-like |
| colour | dark gray |
| Line color | Gray |
| transparency | opaque |
| shine | metallic |
Stibiocolusite is a very rare mineral from the mineral class of sulfides and sulfosalts . It crystallizes in the cubic crystal system with the chemical composition Cu 26 V 2 (Sb, Sn, As) 6 S 32 and forms up to 40 μm large round grains of dark gray color.
Etymology and history
The mineral was first found in 1992 by EM Spiridonov, AS Badalov and VV Kovachev in the Khayragatsch gold deposit in the Chatkal and Qurama mountains (eastern Uzbekistan ) and the Chelopech-Au-Cu mine near Panagyurishte in Bulgaria . They named it after the similarity to the mineral colusite and the element antimony it contained (lat. Stibium).
classification
In the Strunz system , stibiocolusite is a metal sulfide with a ratio of metal to sulfur, selenium or tellurium of 1: 1. After the 8th edition, it forms a group together with colusite , germanite , maikainite , morozeviczite , germanocolusite , ovamboite , polkovicit , renierite , nekrasovite , sulvanite and vinciennite . In the 9th edition , it forms a subgroup of sulfides with zinc , iron , copper or silver with colusite, germanite, maikainite, germanocolusite, ovamboite and nekrasovite .
In the Dana systematics , it forms the colusite group with colusite, germanocolusite and nekrasovite, a subgroup of sulfosalts with the composition (A + ) i (A 2+ ) j [B y C z ] (A: metals, B: semi-metals, C . Non-metals) and the ratio of z / y> 4.
Education and Locations
Stibiocolusite forms in gold-bearing quartz sulphide veins. It is associated with nekrasovite , mawsonite , luzonite , enargite , bornite and goldfieldite .
Only three sites (as of July 2010) are known of the very rare mineral. In addition to the two type localities, stibiocolusite was only found near Sapporo in Japan .
Crystal structure
Stibiocolusite crystallizes in the cubic crystal system in the space group with the lattice parameter a = 10.705 Å and one formula unit per unit cell .
See also
Individual evidence
literature
- EM Spiridonov, AS Badalov, VV Kovachev: Stibiocolusite, Cu 26 V 2 (Sb, Sn, As) 6 S 32 , A: new mineral. In: Doklady Akad. Nauk. 1992, 324, 2, pp. 411-414 (Russian), Abstract in: John Jambor, Edward Grew: New Mineral Names . In: American Mineralogist. 1994, 79, pp. 186-187 ( pdf ).