[PDF] Top 20 A vibrational spectroscopic study of the phosphate mineral lulzacite Sr2 Fe

... The lulzacite sample studied in this work forms part of the collection of the Geology Department of the Federal University of Ouro Preto, Minas Gerais, ... See full document

... to study the vibrational spectroscopy of sido- renkite as there have been very few studies of this mineral as is evidenced in the ...part of a complex paragenesis ... See full document

... for the study of minerals ...for the study of diagenetically related minerals where iso- morphic substitution may occur as with wardite, cyrilovite and minyulite, as often occurs ... See full document

... for the study of minerals, especially minerals containing oxyanions such as phos- ...for the study of diagenetically related minerals where isomorphic substitution may occur as ... See full document

... series of solid solutions. Either of the two minerals can occur in various proportions in a series of solid solutions in the wardite mineral ...accessory mineral in some ... See full document

... Fragments of single crystals of fluellite were placed on a pol- ished metal surface on the stage of an Olympus BHSM microscope, which is equipped with 10, 20, and 50 ...objectives. ... See full document

... The mineral occurs as a fibrous green to black/brown ...to the literature [7,8], variation in the chemical compo- sition may occur with irrational amounts of ferrous ...in the ... See full document

... this study was analyzed with the performance of five spots. The chemical analysis was carried out with a Jeol JXA8900R spectrometer from the Phys- ics Department of the ... See full document

... concerning the mineralogy of phosphates of the fairfiel- dite group minerals are rare in literature [25] and to the best knowledge of the authors, data about ... See full document

... a study of the tellurite mineral sonorite using electron microscopy with EDX com- bined with vibrational ...dominance of Te, Fe, Ce and In with minor amounts of ... See full document

... because of their stability properties and their potential as index minerals ...members of the lazulite–scorzalite so- lid-solution series are synthesized in compositional steps of ... See full document

... pegmatites, of these wide range of minerals are the phosphate minerals of which qingheiite is an ...Al phosphate mineral. The studied sample was collected from ... See full document

... phate of Y and RE elements and has monoclinic symmetry with space group ...spectra of churchite-(Y) were published by Sejk- ora et ...[7]. The Raman spectrum and structural analysis of a ... See full document

... units. The two sharp shoulder bands may be attrib- uted to the Al–OH–Fe groups, ...i.e. the cyrilovite part of the solid ...some of the component bands are due to ... See full document

... interpret the spectra of the phosphate because of complexity and no detailed assignments were ...reported the combined vibrational spectra of a natural ...array ... See full document

... shows the peak position and the relative intensities of the Raman ...parts of the spectrum where no intensity is ob- served and therefore, the spectrum is subdivided into ... See full document

... sphericules. The mineral was named after the Greek for ‘‘fibers,’’ ines, in reference to its common crystal ...habit. The mineral has outstanding colours from pink to orange or ... See full document

... Crystals of ushkovite were placed on a polished metal surface on the stage of an Olympus BHSM microscope, which is equipped with 10, 20, and 50 ...objectives. The microscope is part ... See full document

... Crystals of poldervaartite were placed on a polished metal sur- face on the stage of an Olympus BHSM microscope, which is equipped with 10, 20, and 50 ...objectives. The microscope is part ... See full document

... The mineral khademite contains both sulphate and fluoride an- ions, and therefore, the presence of these anions may be observed using vibrational ...that the fluoride anion and ... See full document