BARYTE - BaSO4, Notas de estudo de Engenharia Química

Baixe BARYTE - BaSO4 e outras Notas de estudo em PDF para Engenharia Química, somente na Docsity! BARYTE Formula: BaSO4 System: Orthorhombic Colour: Colourless, white Lustre: Vitreous, Pearly Hardness: 3 - 3½ Name: Named from the Greek βάρος, weight, for Barite; and βάρσς, heavy, for Barytes, due to its unusual heaviness for a non-metallic mineral. Isostructural with: Anglesite Baryte Group. Baryte-Celestine Series. The barium analogue of Celestine. Typically found as thick to thin tabular crystals, usually in clusters with the crystals growing parallel to one another, or nearly so. Also as bladed, white masses. Baryte, or barite, (BaSO4) is a mineral consisting of barium sulfate. The barite group consists of baryte, celestite, anglesite and anhydrite. Baryte itself is generally white or colorless, and is the main source of barium. Baryte and celestite form a solid solution (Ba,Sr)SO4 together. Names and history The radiating form, sometimes referred to as Bologna Stone, attained some notoriety among alchemists for the phosphorescent specimens found in the 1600s near Bologna by Vincenzo Cascariolo. The name baryte is derived from the Greek word βαρύς (heavy). The American spelling barite is used by USGS and more often used in modern Scientific journals. The International Mineralogical Association adopted "barite" as the official spelling when it formed in 1959[citation needed], but recommended adopting the older "baryte" spelling in 1978, notably ignored by the Mineralogical Society of America.