avujt

Avujt is a rare silicate mineral described in speculative mineralogy. It crystallizes in the monoclinic system and is notable for a layered crystal structure that yields unusual electrical properties. It was first identified in 1986 by researchers surveying ultramafic rocks in the Tanal Range. The name avujt derives from the local language term for "light-bearing stone," reflecting its pale optical glow.

Physical properties: It forms transparent to translucent prismatic crystals up to several centimeters. Color ranges from pale azure to violet. Mohs hardness about 6.5–7. It has a vitreous to pearly luster, notable dielectric constant around 25, and a weak piezoelectric response. Refractive indices around nα=1.72, nβ=1.78, nγ=1.79. It is relatively chemically stable but reacts slowly with hydrofluoric acid.

Occurrence and formation: Occurs in hydrothermal veins within ultramafic rocks and in metamorphosed serpentinites where metasomatic fluids introduce silica and alumina. Economically, it remains extremely rare and is typically recovered as small crystals during mining of associated peridotite deposits. Processing involves flotation and acid treatments to remove matrix minerals.

Applications and significance: Owing to its dielectric and piezoelectric properties, avujt has been proposed for niche electronic components, high-frequency capacitors, and as a potential material for small-scale quantum devices. However, its rarity and the difficulty of extraction limit practical use. There is ongoing research into synthetic analogs to study properties and potential manufacturing pathways.