title: SEM, EDX, infrared and Raman spectroscopic characterization of the silicate mineral yuksporite.
abstract: The mineral yuksporite (K,Ba)NaCa2(Si,Ti)4O11(F,OH)⋅H2O has been studied using the combination of SEM with EDX and vibrational spectroscopic techniques of Raman and infrared spectroscopy. Scanning electron microscopy shows a single pure phase with cleavage fragment up to 1.0 mm. Chemical analysis gave Si, Al, K, Na and Ti as the as major elements with small amounts of Mn, Ca, Fe and REE. Raman bands are observed at 808, 871, 930, 954, 980 and 1087 cm(-1) and are typical bands for a natural zeolite. Intense Raman bands are observed at 514, 643 and 668 cm(-1). A very sharp band is observed at 3668 cm(-1) and is attributed to the OH stretching vibration of OH units associated with Si and Ti. Raman bands resolved at 3298, 3460, 3562 and 3628 cm(-1) are assigned to water stretching vibrations.
authors.affiliation: School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia. Electronic address: r.frost@qut.edu.au.
authors.forename: Ray L
authors.initials: RL
authors.lastname: Frost
authors.affiliation: School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia.
authors.forename: Andrés
authors.initials: A
authors.lastname: López
authors.affiliation: Geology Department, School of Mines, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG 35,400-00, Brazil.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Scholz
authors.affiliation: School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia.
authors.forename: Frederick L
authors.initials: FL
authors.lastname: Theiss
authors.affiliation: Geology Department, Federal University of Minas Gerais, Belo Horizonte, MG 31,270-901, Brazil.
authors.forename: Antônio Wilson
authors.initials: AW
authors.lastname: Romano
mesh_terms: D000535:Aluminum / Q000032:analysis; D008855:Microscopy, Electron, Scanning; D008903:Minerals / Q000032:analysis / Q000737:chemistry*; D011188:Potassium / Q000032:analysis; D017640:Silicates / Q000737:chemistry*; D012964:Sodium / Q000032:analysis; D013052:Spectrometry, X-Ray Emission; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman; D014025:Titanium / Q000032:analysis
chemical_list: D008903:Minerals; D017640:Silicates; D012964:Sodium; D000535:Aluminum; D014025:Titanium; D011188:Potassium
keywords: EDX; Infrared spectroscopy; Raman spectroscopy; SEM; Silicate; Yuksporite