Putoranite
Putoranite | |
---|---|
Putoranite and Talnakhite from Talnach near Norilsk in Russia | |
General and classification | |
other names |
IMA 1979-054 |
chemical formula | Cu 16-18 (Fe, Ni) 18-19 S 32 |
Mineral class (and possibly department) |
Sulfides and sulfosalts |
System no. to Strunz and to Dana |
2.CB.10 ( 8th edition : II / C.04) 02.09.07.01 |
Crystallographic Data | |
Crystal system | cubic |
Crystal class ; symbol | m 3 m |
Space group | Pn 3 m |
Lattice parameters | a = 5.30 Å Please complete the source as an individual reference |
Formula units | Z = 3 Please complete the source as an individual reference |
Twinning | polysynthetic |
Physical Properties | |
Mohs hardness | 4.5 |
Density (g / cm 3 ) | 6.14 |
Cleavage | Please complete |
colour | brass colored |
Line color | White |
transparency | opaque |
shine | metallic |
Putoranite 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 16-18 (Fe, Ni) 18-19 S 32 and rarely forms crystals , mostly brass-colored grains up to 0.1 mm in size, which are fused with Mooihoekite .
Etymology and history
The mineral was found for the first time in 1980 by AA Filimonowa, TL Evstigneewa and IP Laputina in Russia at Talnach, located on the northwestern edge of the Putorana Mountains (since 2004 part of the southwestern Norilsk ) in the Oktyabr mining area . They named it after the mountains.
classification
In the Strunz system , putoranite is classified among the sulfides and sulfosalts. It is counted among the sulphides with a ratio of metal to sulfur, selenium or tellurium of 1: 1. In the eighth edition , it formed a group with haycockite , isocubanite , mooihoekite , orickite , talnakhite and wilhelmramsayit . In the ninth edition , the sulfides are also subdivided into cations, where putoranite with chalcopyrite , eskebornite , haycockite, laforêtite , lenaite , mooihoekite, gallite , roquesite and talnakhite forms a subgroup of metal sulfides with a metal to sulfur, selenium or tellurium ratio of 1 : 1 and zinc , iron , copper or silver .
In the systematics of minerals according to Dana , it forms its own subgroup of sulfides - including selenides and tellurides - with the composition Am Bn Xp, with (m + n): p = 1: 1.
Education and Locations
Putoranite forms in copper-nickel deposits. It is associated with mooihoekite, talnakhite, cabriite , cubanite , pentlandite , magnetite , galena , sphalerite , platinum group minerals, silver , alabandite , valleriite , mackinawit , manganese shadlunite and djerfisherite .
In addition to the type locality in Russia, finds are only known from the Dağküplü and Kavak mines near Eskişehir in Turkey .
Crystal structure
Putoranite crystallizes in the cubic crystal system in the space group Pn 3 m with the lattice parameter a = 5.30 Å and three formula units per unit cell .
See also
Individual evidence
literature
- Putoranite in: Anthony et al .: Handbook of Mineralogy , 1990, 1, 101 ( pdf )