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The Mineral rheniite

Rheniite

Rheniite is the only known mineral with the extremely rare element rhenium as its primary metallic constituent, and as such is a fascinating and exotic species. However, Rheniite is too rare to be mined as an ore of rhenium. All rhenium is extracted from Molybdenite, which contains traces of rhenium in certain localities. Rheniite is named after its rhenium content, and rhenium is named after the Rhine River in Europe. Rheniite is a relatively new mineral, and was only accepted as an individual mineral species in 2004.

Chemical Formula

ReS2

Color

Silver-gray

Crystal System

Triclinic

Properties

Streak
Black
Hardness
1.5
Transparency
Opaque
Specific Gravity
7.5
Luster
Metallic
Cleavage
NA
Fracture
NA
Tenacity
NA

Crystal Habits

In groups of tiny wedge-shaped or platy crystals and crusty or flaky grains.

Additional Information

Composition
Rhenium disulfide
In Group
Sulfides; Simple Sulfides
Striking Features
Mode of occurence
Environment
In fumarole in active volcanos. Also in epithermal veins in porphyry.
Rock Type
Igneous

Uses

As an extremely rare collectors mineral.

Noteworthy Localities

Rheniite was first discovered in the Kudriavy Volcano, on Iturup Island in the Kurile Islands, Russia. It has subsequently been found in several other deposits, but the Kudriavy Volcano has been the only specimen-producer.

Common Mineral Associations

Quartz, Molybdenite

rheniite Photos



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