Montmorillonite, Bentonite

Description

Montmorillonite is a primary constituent of bentonite, a clay mineral recognized for its exceptional plasticity and extremely fine particle size. Classified within the smectite group as a 2:1 phyllosilicate, its structure consists of an octahedral alumina sheet positioned between two tetrahedral silica sheets. These microscopic, plate-like crystals typically possess a diameter of roughly 1 μm and a thickness of approximately 0.96 nm. Geologically, these deposits often originate from the long-term alteration of volcanic ash that accumulated in layers following historical volcanic events, transitioning from a glassy state into claystone. In ceramic applications, bentonite is frequently incorporated into porcelain and clay bodies at concentrations between 1% and 5% to significantly enhance workability and plastic properties. Beyond ceramics, the material's unique physical characteristics make it a versatile additive across various industrial sectors, including the production of paper, paints, rubber, detergents, and drilling fluids.