title: Vibrational spectroscopic study of the mineral creaseyite Cu2Pb2(Fe,Al)2(Si5O17)·6H2O - A zeolite mineral?
abstract: Vibrational spectroscopy has been used to characterise the mineral creaseyite Cu(2)Pb(2)(Fe,Al)(2)(Si(5)O(17))·6H(2)O. The mineral is found in the oxidised zone of base metal deposits and interestingly is associated with copper silicate minerals including ajoite, kinoite, chrysocolla as well as wulfenite, willemite, mimetite and wickenburgite. Creaseyite is a mineral with zeolitic properties. A Raman band at 998cm(-1) is assigned to the SiO stretching vibration of SiO(3) units. The Raman band at 1071cm(-1) is assigned to the SiO stretching vibrations of the Si(2)O(5) units. Raman bands are found at 2750, 2902, 3162, 3470 and 3525cm(-1). The band at 3525cm(-1) is attributed to zeolitic water. Other bands are assigned to water coordinated to the metal cations. Vibrational spectroscopy enables aspects of the molecular structure of creaseyite to be determined.
authors.affiliation: School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia. r.frost@qut.edu.au
authors.forename: Ray L
authors.initials: RL
authors.lastname: Frost
authors.forename: Yunfei
authors.initials: Y
authors.lastname: Xi
mesh_terms: D008670:Metals / Q000737:chemistry*; D012828:Silicones / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman; D014732:Vibration; D017641:Zeolites / Q000737:chemistry*
chemical_list: D008670:Metals; D012828:Silicones; D017641:Zeolites