chabasiitti

Chabazite is a naturally occurring zeolite mineral. Zeolites are tectosilicate minerals containing a framework of (AlO4)5- and (SiO4)4- tetrahedra linked by shared oxygen atoms. This structure forms a complex network of interconnected channels and cavities. Chabazite specifically belongs to the gmelinite group of zeolites and has a crystal structure that allows it to absorb and release water, cations, and molecules within these pores. Its chemical formula is typically (Ca, Na2, K2, Mg) [Al2Si4O12] · 6H2O, though variations exist.

Chabazite is found in a variety of geological settings. It commonly occurs in cavities within volcanic rocks, such as basalts and andesites, where it forms as a secondary mineral during hydrothermal alteration. It can also be found in sedimentary rocks and metamorphic terrains. Its color can range from colorless to white, yellow, red, or green, depending on the presence of impurities. The crystals are often small and can be found in druses or as coatings.

Due to its porous structure, chabazite exhibits ion-exchange properties, meaning it can selectively adsorb certain ions from solutions. This characteristic has led to its investigation and application in areas such as water purification, gas separation, and as a catalyst. It is also collected by mineral enthusiasts for its aesthetic qualities and well-formed crystals. While not as extensively mined as some other zeolites, chabazite is a notable member of this important mineral group.