2011
A Raman spectroscopic study of bukovskýite Fe2(AsO4)(SO4)(OH) . 7H2O, a mineral phase with significant role in arsenic migration
LOUN, Jan; Jiří ČEJKA; Jiří SEJKORA; Jakub PLÁŠIL; Milan NOVÁK et al.Základní údaje
Originální název
A Raman spectroscopic study of bukovskýite Fe2(AsO4)(SO4)(OH) . 7H2O, a mineral phase with significant role in arsenic migration
Autoři
LOUN, Jan; Jiří ČEJKA; Jiří SEJKORA; Jakub PLÁŠIL; Milan NOVÁK; Ray Leslie FROST; Sara PALMER a Eloise C. KEEFFE
Vydání
Journal of Raman Spectroscopy, 2011, 0377-0486
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10500 1.5. Earth and related environmental sciences
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 3.087
Označené pro přenos do RIV
Ano
Kód RIV
RIV/00216224:14310/11:00055985
Organizační jednotka
Přírodovědecká fakulta
UT WoS
Klíčová slova anglicky
bukovskyite; Raman spectroscopy; arsenate; sulfate; hydroxyl ions; molecular water
Změněno: 14. 3. 2012 08:15, prof. RNDr. Milan Novák, CSc.
Anotace
V originále
The Raman spectrum of bukovskyite [Fe2(3+)(OH)(SO4)(AsO4) . 7H2O] has been studied and compared with that of an amorphous gel containing specifically Fe, As and S, which is understood to be an intermediate product in the formation of bukovskyite. The observed bands are assigned to the stretching and bending vibrations of (SO4)2- and (AsO4)3- units, stretching and bending vibrations and vibrational modes of hydrogen-bonded water molecules, stretching and bending vibrations of hydrogen-bonded (OH)- ions and Fe3+ -(O,OH) units. The approximate range of O-H ... O hydrogen bond lengths was inferred from the Raman spectra. Raman spectra of crystalline bukovskyite and of the amorphous gel differ in that the bukovskyite spectrum is more complex, the observed bands are sharp and the degenerate bands of (SO4)2- and (AsO4)3- are split and more intense. Lower wavenumbers of delta H2O bending vibrations in the spectrum of the amorphous gel may indicate the presence of weaker hydrogen bonds compared to those in bukovskyite.
Návaznosti
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