Ileyite

Ileyite is a rare mineral belonging to the zeolite group, known for its distinctive crystal structure and chemical composition. It was first described in the early 20th century and has since been identified in limited localities worldwide. The mineral typically forms translucent to transparent crystals exhibiting a skeletal or tabular habit.

Chemically, ileyite is a hydrated alkali calcium aluminum silicate, with the approximate formula Ca2Al3Si3O12·3H2O. Its composition includes calcium, aluminum, silicon, and water molecules, which contribute to its porosity and ability to undergo ion exchange processes, characteristics common to zeolites.

Ileyite's crystal system is orthorhombic, and it usually occurs as fine-grained aggregates or well-formed crystals, often embedded in volcanic or metamorphic rocks. Its physical properties include a vitreous luster, a Mohs hardness of approximately 4, and a calculated specific gravity around 2.3 to 2.4.

Due to its rarity, ileyite has limited industrial applications and is primarily of interest to mineral collectors and researchers studying zeolite mineralogy. Its structural features make it of interest in studies related to molecular sieves, catalysis, and ion exchange technologies.

Because of its limited geographic distribution and scarcity, ileyite remains a mineral of scientific interest rather than a commercially significant material. It is often housed in mineral collections and research institutions, contributing to the understanding of zeolite mineralogy and geochemical processes in volcanic environments.

---