Jørspallonite

Jørspallonite is a rare mineral belonging to the silicate group. Its chemical formula is typically represented as (Ca,REE)2(Na,Ca)2(Si4O10)2(OH,F)2·nH2O, although variations exist. It is characterized by the presence of calcium, sodium, and rare earth elements (REE), along with silicon, oxygen, hydroxyl, and fluorine. The presence of water molecules within its structure is also notable.

The mineral was first discovered in the Jørspall mine located in Norway, from which it derives its name. Jørspallonite typically forms in pegmatitic environments and is often associated with other rare minerals. Its crystal habit is usually described as prismatic or acicular, occurring in aggregates. The color of jørspallonite can range from pale pink to reddish-brown, and it possesses a vitreous luster.

Geologically, jørspallonite is considered a post-magmatic alteration product. Its rarity makes it a subject of interest for mineral collectors and researchers studying the complex geochemistry of certain ore deposits. Analysis of jørspallonite has provided insights into the conditions under which these rare silicate minerals form. Due to its limited occurrence, detailed studies on its physical and chemical properties are still ongoing.