Patronite
| Patronite | |
|---|---|
 |
|
| General and classification | |
| chemical formula | VS 4 |
|
Mineral class (and possibly department) |
Sulfides and sulfosalts |
|
System no. to Strunz and to Dana |
2.EC.10 ( 8th edition : II / F.01) 02.16.21.01 |
| Crystallographic Data | |
| Crystal system | monoclinic |
| Crystal class ; symbol | 2 / m |
| Space group | I 2 / c |
| Lattice parameters |
a = 6.78 Å ; b = 10.42 Å; c = 12.11 Å β = 100.8 ° Please complete the source as an individual reference |
| Formula units | Z = 8 Please complete the source as an individual reference |
| Physical Properties | |
| Mohs hardness | 2 |
| Density (g / cm 3 ) | 2.82 |
| Cleavage | Please complete |
| colour | dark gray |
| Line color | black |
| transparency | opaque |
| shine | metallic |
Patrónite is a rarely occurring mineral from the mineral class of sulfides and sulfosalts . It crystallizes in the monoclinic crystal system with the chemical formula VS 4 and forms aggregates of columnar crystals of dark gray color.
Etymology and history
Patrónit was first found in 1906 by Hewett in the type locality Minas Ragra near Cerro de Pasco in Peru . The mineral is named after the Peruvian metallurgist Antenor Rizo-Patrón .
classification
In the Strunz system , patronite is classified as sulfides and sulfosalts. In the 8th edition it formed its own subgroup of non-metallic sulfides. In the 9th edition , it is assigned to the metal sulfides with a ratio of metal to sulfur of greater than 1: 2.
In the system of minerals according to Dana , patronite forms a separate subgroup of sulfides with different formulas.
Education and Locations
Patrónite forms in fissures that were formed in shale and that are filled with asphalt-like hydrocarbon. It is mixed with various other vanadium minerals. It is often strongly associated with sulfur , coal , clay and bravoite . Other associated minerals are pyrite , minasragrite , stanleyite , dwornikite and quartz .
Patrónit is known almost exclusively from the Ragra mine in Peru. In this largest known deposit of vanadium ores, patronite is one of the main ores. Other occurrences are only known from the Tsumeb mine in Namibia .
Crystal structure
Patrónite crystallizes in the monoclinic crystal system in the space group I 2 / c , the lattice parameters a = 6.78 Å , b = 10.42 Å, c = 12.11 Å and β = 100.8 ° and eight formula units per unit cell .
use
For a long time, patrónite was the most important source of vanadium. In the meantime, however, it has been replaced by magnetite ores, from which vanadium can be extracted as a by-product.
See also
Individual evidence
literature
- Patrónit in: Anthony et al .: Handbook of Mineralogy , 1990, 1, 101 ( pdf )
- Paul Ramdohr , Hugo Strunz : Textbook of Mineralogy. 16th edition. Ferdinand Enke Verlag, Stuttgart 1978, ISBN 3-432-82986-8 , p. 482.
Web links
- Mineral Atlas: Patrónit (Wiki)
- mindat.org - patronite (Engl.)