MAURELIA, R.R.MAURELIAZAMORA, R.R.ZAMORAGUEVARA, M.M.GUEVARAROJAS, M.M.ROJASROJAS, L.L.ROJAS2026-10-192026-10-192000-12MAURELIA, R.; ZAMORA, R.; GUEVARA, M.; ROJAS, M.; ROJAS, L. (2000-12). Characterization and isolation of a natural stilbite from Atacama region, Chile. BOLETIN DE LA SOCIEDAD CHILENA DE QUIMICA, 45 (4), 569-575. https://doi.org/10.4067/s0366-164420000004000070366-1644https://hdl.handle.net/20.500.12740/25211The properties of natural stilbite from the Atacama region of Chile are described in this work. This mineral shows colorless, white and honey-brownish shades, and it presents pearly and vitreous luster with a radial crystallization form. The results from the physical and chemical characterization are the following: Mohs hardness = 3-4, specific gravity = 2.05, mass loss by heating = 17.4% and mass loss by HCl dissolution = 35.5%. The chemical composition is Na (0.59%), Ca (5.64%),Al (9.40%), Si+O (66.93%), H2O (17.44%).The X-ray diffraction patterns match also very well with stellerite, a Na-free orthorhombic zeolite (stilbite is recognized as monoclinic), suggesting the presence of two different crystal growing sectors. The IR spectrum shows the characteristic O-H stretching and bending and the symmetric and asymmetric T-O (T: Si, Al) stretching absorption bands. Gravitational combined with magnetic separation methods seems to be appropriated for separating the stilbite from the associated gangue.esnatural zeolitestilbitecharacterizationisolationArticulohttps://doi.org/10.4067/s0366-16442000000400007