title: Moganite in selected Polish chert samples: the evidence from MIR, Raman and X-ray studies.
abstract: The authors discuss the results of structural investigations (XRD, MIR, Raman) of Polish cherts from different geological formations. The X-ray diffraction analyses explicitly confirmed the presence of moganite, which was identified on the basis of satellite XRD peaks positioned/occurring close to the quartz reflections and the additional reflections with the dhkl values 4.456 and 3.101 Ǻ, and established its amounts as varying between about 1 and above 17 wt%. The mid-infrared and Raman spectroscopy also proved the presence of moganite, indicated by the 695 and 560-555 cm(-)(1) bands, respectively. These analytical finds allow to identify moganite in samples containing various SiO2 polymorphs.
authors.affiliation: AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Mickiewicza 30, 30-059 Cracow, Poland. Electronic address: msitarz@agh.edu.pl.
authors.forename: M
authors.initials: M
authors.lastname: Sitarz
authors.affiliation: AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Mickiewicza 30, 30-059 Cracow, Poland.
authors.forename: P
authors.initials: P
authors.lastname: Wyszomirski
authors.affiliation: AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Mickiewicza 30, 30-059 Cracow, Poland.
authors.forename: B
authors.initials: B
authors.lastname: Handke
authors.affiliation: AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Mickiewicza 30, 30-059 Cracow, Poland.
authors.forename: P
authors.initials: P
authors.lastname: Jeleń
mesh_terms: D005843:Geography; D019015:Geologic Sediments / Q000737:chemistry*; D008903:Minerals / Q000737:chemistry*; D011044:Poland; D011791:Quartz; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman; D014961:X-Ray Diffraction; D014965:X-Rays
chemical_list: D008903:Minerals; D011791:Quartz
keywords: Chert; Moganite; SiO(2) polymorphs; Spectroscopy