Zvyagintsevit
| Zvyagintsevit | |
|---|---|
 |
|
| General and classification | |
| other names |
IMA 1966-006 |
| chemical formula | Pd 3 Pb |
|
Mineral class (and possibly department) |
Elements - PGE metal alloys |
|
System no. to Strunz and to Dana |
1.AG.10 ( 8th edition : I / A.16) 02/01/05/04 |
| Crystallographic Data | |
| Crystal system | cubic |
| Crystal class ; symbol | m-3m |
| Space group | Pm 3 m (No. 221) |
| Lattice parameters | a = 4.025 Å |
| Formula units | Z = 1 |
| Physical Properties | |
| Mohs hardness | 4.5 |
| Density (g / cm 3 ) | measured: 13.32 (synthetic); calculated: 13.42 |
| Cleavage | Please complete |
| colour | tin white |
| Line color | black |
| transparency | opaque |
| shine | metallic |
Zvyagintsevit is a very rare mineral from the mineral class of the elements, more precisely metals and intermetallic compounds . It crystallizes in the cubic crystal system with the chemical composition Pd 3 Pb, so it is a compound of palladium and lead . It forms irregularly shaped grains or drop-like inclusions of tin-white color up to 250 μm in size.
Etymology and history
The mineral was first found in 1975 by AD Genkin, IW Murawewa and NW Tronewa in a copper - nickel deposit near Talnach near Norilsk ( Russia ). They named it after the Russian geochemist Orest Evgenevich Swjaginzew (English Orest Evgenevich Zvyagintsev , 1894-1967), who had carried out research in the field of platinum metals .
classification
Already in the outdated, but partly still in use 8th edition of the mineral classification according to Strunz , the Zvyagintsevit belonged to the mineral class of "elements" and there to the department of "metals and intermetallic alloys (without semimetals)", where it together with atokit , niggliit , palarstanid , Plumbopalladinite , rustenburgite and stannopalladinite formed the unnamed group I / A.16 .
The 9th edition of Strunz's mineral systematics , which has been in effect since 2001 and is used by the International Mineralogical Association (IMA), also assigns the Zvyagintsevit to the “Metals and Intermetallic Compounds” section. However, this is further subdivided according to the metals predominating in the compound, which have been divided into metal families according to their related properties. According to its composition, Zvyagintsevit can be found in the sub-section " PGE metal alloys", where it is named after the "Zvyagintsevit Group" with the system no. 1.AG.10 and the other members Atokit and Rustenburgit.
The systematics of minerals according to Dana , which is mainly used in the English-speaking world , assigns the Zvyagintsevit to the class and department of the same name of "elements". Here it is together with isoferroplatinum , rustenburgit, atokit, Chengdeit and Yixunit in the " isoferroplatinum group (space group Pm3m) " with the system no. 02/01/05 to be found in the subsection "Elements: Platinum Group Metals and Alloys".
Crystal structure
Zvyagintsevit crystallizes in the cubic crystal system in the space group Pm 3 m (space group no. 221) with the lattice parameter a = 4.02 Å and one formula unit per unit cell . The atoms in Zvyagintsevit are arranged in a face-centered cubic fashion. The lead atoms are more at the corners, while the palladium atoms form the face-centered atoms.
Education and Locations
Zvyagintsevit forms in copper sulfide ores. It is associated with platinum - iron - alloys , polarity , talnakhite , Cubanit , pentlandite , magnetite , Valleriit and silver - gold alloys.
15 sites are currently (as of July 2010) known of the rare mineral. In addition to its type locality of the Zapolyarny Mine (Noril'sk Region) in western Siberia and other finds in Russia, these include the marathon in Canada , Kirakkajuppura in Finland , Kangerlussuaq in Greenland , the Bushveld complex in South Africa and the Stillwater complex in the US state of Montana .
See also
literature
- Jan T. Szymanski, Louis J. Cabri, JH Gilles Laflamme: The crystal structure and calculated powder-diffraction data for zvyagintsevite, Pd 3 Pb . In: Canadian Mineralogist . tape 35 , 1997, pp. 773-776 ( rruff.info [PDF; 309 kB ; accessed on October 23, 2017]).
Web links
Individual evidence
- ↑ a b c Jan T. Szymanski, Louis J. Cabri, JH Gilles Laflamme: The crystal structure and calculated powder-diffraction data for zvyagintsevite, Pd 3 Pb . In: Canadian Mineralogist . tape 35 , 1997, pp. 773-776 ( rruff.info [PDF; 309 kB ; accessed on October 23, 2017]).
- ↑ a b c Zvyagintsevite . In: John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, Monte C. Nichols (Eds.): Handbook of Mineralogy, Mineralogical Society of America . 2001 ( handbookofmineralogy.org [PDF; 58 kB ; accessed on October 23, 2017]).
- ↑ Michael Fleischer: New Mineral Names . In: The American Mineralogist . tape 52 , January 1967, p. 299 ( minsocam.org [PDF; 139 kB ; accessed on October 23, 2017]).
- ↑ Mindat - Zvyagintsevite (English)
- ^ Mineralienatlas: Zvyagintsevit
- ^ Mindat - Locations for Zvyagintsevit