Rudashevskyit
| Rudashevskyit | |
|---|---|
| General and classification | |
| other names |
IMA 2005-017 |
| chemical formula | (Fe, Zn) S |
|
Mineral class (and possibly department) |
Sulfides and sulfosalts |
|
System no. to Strunz and to Dana |
2.CB.05a ( 8th edition : not awarded) 02.08.02.07 |
| Crystallographic Data | |
| Crystal system | cubic |
| Crystal class ; symbol | 4 3 m |
| Space group | F 4 3 m |
| Lattice parameters | a = 5.426 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 | Please complete |
| Density (g / cm 3 ) | 3.79 (calculated) |
| Cleavage | no |
| Break ; Tenacity | brittle |
| colour | black |
| Line color | Brown black |
| transparency | opaque |
| shine | Resin to semi-metallic gloss |
Rudashevskyite is a very rare mineral from the mineral class of sulfides and sulfosalts . It crystallizes in the cubic crystal system with the chemical composition (Fe, Zn) S and forms polycrystalline, 5-120 μm large grains of black color.
Etymology and history
The mineral was first found in 2005 by Sergey N. Britvin, Alla N. Bogdanova, Maya M. Boldyreva and Galina Y. Aksenova in the Indarch meteorite near Şuşa in Azerbaijan ( Nagorno Karabakh ). They named it after the Russian mineralogist NS Rudashevsky.
classification
In the Strunz system , rudashevskyite is a metal sulfide with a ratio of metal to sulfur, selenium or tellurium of 1: 1. After the 8th edition forms the sphalerite group together with Coloradoite , Stilleit , Hawleyite , Polhemusite , Sphalerite , Metacinnabarite and Tiemannite . In the 9th edition it forms with these minerals and sakuraiite a subgroup of the sulfides with zinc , iron , copper or silver .
In the Dana systematics , with Coloradoite, Stilleit, Hawleyite, Sphalerite, Metacinnabarite and Tiemannite, it forms the sphalerite subgroup of sulfides, selenides and tellurides with the composition A m B n X p , with (m + n): p = 1: 1.
Education and Locations
Rudashevskyit formed in an accompanying phase of the Indarch meteorite. It is associated with Klinoenstatite , Kamacite , Troilite , Oldhamite , Niningerite , Schreibersite and Roedderite .
Only the type locality is known as the location.
Crystal structure
Rudashevskyite crystallizes in the cubic crystal system in the space group with the lattice parameter a = 5.426 Å and four formula units per unit cell . The structure thus corresponds to the sphalerite structure.
See also
Individual evidence
literature
Sergey N. Britvin, Alla N. Bogdanova, Maya M. Boldyreva, Galina Y. Aksenova: Rudashevskyite, the Fe-dominant analogue of sphalerite, a new mineral: Description and crystal structure. In: American Mineralogist. 2008, 93, pp. 902-909 ( abstract ; PDF; 114 kB).