Vibrational spectroscopic characterization of the sulphate mineral khademite Al(SO4)F⋅5(H2O)

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Vibrational spectroscopic characterization of the sulphate mineral khademite Al(SO4)F·5(H2O).

Vibrational spectroscopy has been used to characterize the sulphate mineral khademite Al(SO4)F·5(H2O). Raman band at 991 cm-1 with a shoulder at 975 cm-1 is assigned to the ν1 (SO4)2- symmetric stretching mode. The observation of two symmetric stretching modes suggests that the sulphate units are not equivalent. Two low intensity Raman bands at 1104 and 1132 cm-1 are assigned to the ν3 (SO4)2- ...

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Raman spectroscopy at 298 and 77K has been used to study the secondary uranyl mineral johannite of formula (Cu(UO2)2(SO4)2(OH)2 x 8H2O). Four Raman bands are observed at 3593, 3523, 3387 and 3234cm(-1) and four infrared bands at 3589, 3518, 3389 and 3205cm(-1). The first two bands are assigned to OH- units (hydroxyls) and the second two bands to water units. Estimations of the hydrogen bond dis...

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Thermal analysis and vibrational spectroscopic characterization of the boro silicate mineral datolite - CaBSiO4(OH).

The objective of this work is to determine the thermal stability and vibrational spectra of datolite CaBSiO4(OH) and relate these properties to the structure of the mineral. The thermal analysis of datolite shows a mass loss of 5.83% over a 700-775°C temperature range. This mass loss corresponds to 1 water (H2O) molecules pfu. A quantitative chemical analysis using electron probe was undertaken...

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Structural characterization and vibrational spectroscopy of the arsenate mineral wendwilsonite.

In this paper, we have investigated on the natural wendwilsonite mineral with the formulae Ca2(Mg,Co)(AsO4)2⋅2(H2O). Raman spectroscopy complimented with infrared spectroscopy has been used to determine the molecular structure of the wendwilsonite arsenate mineral. A comparison is made with the roselite mineral group with formula Ca2B(AsO4)2⋅2H2O (where B may be Co, Fe(2+), Mg, Mn, Ni, Zn). The...

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Vibrational spectroscopic characterization of the phosphate mineral althausite Mg2(PO4)(OH,F,O)--implications for the molecular structure.

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ژورنال

عنوان ژورنال: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

سال: 2013

ISSN: 1386-1425

DOI: 10.1016/j.saa.2013.07.020