title: Investigations of kinetics and mechanism of chloropinnoite in boric acid aqueous solution at 303 K by Raman spectroscopy.
abstract: Raman spectroscopy of dissolution and transformation of chloropinnoite in 4.5% (wt.%) boric acid aqueous solution at 303 K has been recorded. The Raman spectra of kinetics process have been obtained. The phase transformation product is 2MgO.3B2O3.15H2O (kurnakovite). The main polyborate anions and their interaction in aqueous solution have been proposed according to the Raman spectrum. Some assignments were tentatively given and the relations between the existing forms of polyborate anions and the crystallizing solid phases have been gained. A mechanism of dissolution and crystallization reactions and the formation condition of kurnakovite in Qinghai-Tibet plateau were proposed and discussed.
authors.affiliation: College of Tourism and Environment, Shaanxi Normal University, No. 1 ShiDa Road, Xi'an, Shaanxi 710062, PR China. lixp320@sohu.com
authors.forename: Li
authors.initials: L
authors.lastname: Xiaoping
authors.forename: Gao
authors.initials: G
authors.lastname: Shiyang
authors.forename: Xia
authors.initials: X
authors.lastname: Shuping
mesh_terms: D001881:Borates / Q000737:chemistry*; D001888:Boric Acids; D007700:Kinetics; D008277:Magnesium Oxide / Q000737:chemistry*; D008956:Models, Chemical; D012996:Solutions; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman; D014867:Water; D014961:X-Ray Diffraction
chemical_list: D001881:Borates; D001888:Boric Acids; D012996:Solutions; C475672:chloropinnoite; D014867:Water; D008277:Magnesium Oxide; C032688:boric acid