vanadiiniionin

Vanadiiniionin is a rare and complex mineral that was first discovered in 1982 in the Kola Peninsula, Russia. It is named after its chemical composition, which includes vanadium, nickel, and iron. The mineral is characterized by its dark brown to black color and its metallic luster. Vanadiiniionin crystallizes in the orthorhombic system and typically forms small, prismatic crystals or granular masses.

The chemical formula of vanadiiniionin is (Ni,Fe)2V2O7. It is a member of the vanadium oxide group and is closely related to other minerals such as descloizite and roscoelite. The mineral's structure consists of layers of vanadium oxide octahedra and nickel-iron octahedra, which are interconnected through shared oxygen atoms.

Vanadiiniionin is relatively rare and is found in only a few locations worldwide, including its type locality in the Kola Peninsula and in the Ural Mountains of Russia. It is often associated with other vanadium-bearing minerals and is typically formed in hydrothermal veins or in skarn deposits.

The mineral's properties and occurrence make it of interest to mineralogists and geologists studying the geochemistry of vanadium and the formation of hydrothermal deposits. However, due to its rarity and the limited information available, vanadiiniionin remains a relatively little-studied mineral.