Basinit

Basinit is a mineral that belongs to the serpentine group. Its chemical formula is Mg3Si2O5(OH)4, which is the same as the more common mineral serpentine. However, basinit has a different crystal structure, meaning the atoms are arranged in a different way. This difference in atomic arrangement gives basinit distinct physical properties compared to serpentine minerals.

Basinit is known for its fibrous or acicular (needle-like) crystal habit. It typically forms in metamorphic rocks, often associated with the alteration of ultramafic rocks, which are rich in magnesium and iron. The formation of basinit usually occurs under specific temperature and pressure conditions during metamorphism.

While chemically similar to serpentine, basinit is generally considered less common. Its identification and distinction from other serpentine group minerals often require detailed mineralogical analysis, including X-ray diffraction. The study of basinit contributes to understanding the complex geological processes that occur deep within the Earth's crust.