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, Ray Leslie FROST, Sara PALMER and Eloise C. KEEFFE. A Raman spectroscopic study of bukovskýite Fe2(AsO4)(SO4)(OH) . 7H2O, a mineral phase with significant role in arsenic migration. Journal of Raman Spectroscopy. 2011, vol. 42, No 7, p. 1596-1600. ISSN 0377-0486. Available from: https://dx.doi.org/10.1002/jrs.2900.

Basic information

• Original name: A Raman spectroscopic study of bukovskýite Fe2(AsO4)(SO4)(OH) . 7H2O, a mineral phase with significant role in arsenic migration
• Authors: LOUN, Jan (203 Czech Republic, belonging to the institution), Jiří ČEJKA (203 Czech Republic), Jiří SEJKORA (203 Czech Republic, guarantor), Jakub PLÁŠIL (203 Czech Republic), Milan NOVÁK (203 Czech Republic, belonging to the institution), Ray Leslie FROST (36 Australia), Sara PALMER (36 Australia) and Eloise C. KEEFFE (36 Australia).
• Edition: Journal of Raman Spectroscopy, 2011, 0377-0486.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10500 1.5. Earth and related environmental sciences
• Country of publisher: United States of America
• Confidentiality degree: is not subject to a state or trade secret
• Impact factor: Impact factor: 3.087
• RIV identification code: RIV/00216224:14310/11:00055985
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.1002/jrs.2900
• UT WoS: 000293001000017
• Keywords in English: bukovskyite; Raman spectroscopy; arsenate; sulfate; hydroxyl ions; molecular water
• Tags: AKR, rivok

Abstract

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.

Links

• MSM0021622412, plan (intention): Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)

Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)