کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1236532 968870 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A vibrational spectroscopic study of hydrated Fe3+ hydroxyl-sulfates; polymorphic minerals butlerite and parabutlerite
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
A vibrational spectroscopic study of hydrated Fe3+ hydroxyl-sulfates; polymorphic minerals butlerite and parabutlerite
چکیده انگلیسی

Raman and infrared spectra of two polymorphous minerals with the chemical formula Fe3+(SO4)(OH)·2H2O, monoclinic butlerite and orthorhombic parabutlerite, are studied and the spectra assigned. Observed bands are attributed to the (SO4)2− stretching and bending vibrations, hydrogen bonded water molecules, stretching and bending vibrations of hydroxyl ions, water librational modes, Fe–O and Fe–OH stretching vibrations, Fe–OH bending vibrations and lattice vibrations. The O–H⋯O hydrogen bond lengths in the structures of both minerals are calculated from the wavenumbers of the stretching vibrations. One symmetrically distinct (SO4)2− unit in the structure of butlerite and two symmetrically distinct (SO4)2− units in the structure of parabutlerite are inferred from the Raman and infrared spectra. This conclusion agrees with the published crystal structures of both mineral phases.

Raman and infrared spectra of two polymorphous minerals with the chemical formula Fe3+(SO4)(OH)·2H2O, monoclinic butlerite and orthorhombic parabutlerite, are studied and the spectra assigned. One symmetrically distinct (SO4)2− unit in the structure of butlerite and two symmetrically distinct (SO4)2− units in the structure of parabutlerite are inferred from the Raman and infrared spectra.Figure optionsDownload as PowerPoint slideHighlights
► Parabutlerite and butlerite both have a chemical formula Fe3+(SO4)(OH)·2H2O.
► Fe3+ hydroxyl-sulfates butlerite and parabutlerite and bands are assigned.
► One symmetrically distinct (SO4)2− unit is in the structure of butlerite.
► Two symmetrically distinct (SO4)2− units is in the structure of parabutlerite.
► O–H⋯O hydrogen bond lengths are between 2.87 and 2.69 Å.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 79, Issue 5, September 2011, Pages 1356–1363
نویسندگان
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