Bavenite

Bavenite is a relatively rare hydrated calcium barium aluminum silicate mineral with the chemical formula BaCa₂Al₂Si₉O₂₆(OH)₂. It crystallizes in the orthorhombic system, typically forming as radiating aggregates of thin, bladed or fibrous crystals. The mineral is usually colorless, white, or light yellow.

Bavenite is a secondary mineral, often found in cavities and fractures in altered igneous rocks, particularly granites and pegmatites. It's often associated with other secondary minerals such as albite, quartz, calcite, and various zeolites.

The name "bavenite" originates from Baveno, Italy, where it was first discovered.

Identifying bavenite can be challenging due to its rarity and similarity to other silicate minerals. Identification typically requires X-ray diffraction or other analytical techniques. Its optical properties, including its birefringence and refractive indices, can also aid in its identification.

Bavenite has no significant industrial applications. Its primary interest lies within the scientific community as a mineralogical specimen and for research purposes related to mineral formation and geochemistry.