Investigation of Fe-based oxyhydroxy-fluoride with hollandite-type structure
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DEMOURGUES, Alain | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | WATTIAUX, Alain | |
| dc.date.issued | 2011 | |
| dc.identifier.issn | 0022-1139 | |
| dc.description.abstractEn | Well crystallized Fe-based oxyhydroxy-fluoride with the FeO(OH<sub>0.2</sub>F<sub>0.8</sub>)*0.2H<sub>2</sub>O chemical composition has been prepared from hydrolysis of Fe trifluoride under supercritical CO<sub>2</sub> conditions. Investigation by Mössbauer spectroscopy and neutron diffraction show that this compound crystallize in the monoclinic symmetry (SG: <i>I</i>2/<i>m</i>, <i>a</i> = 10.447(7) Å, <i>b</i> = 3.028(2) Å, <i>c</i> = 10.445(4) Å, <i>β</i> = 90.00(3)°). Taking into account the Fe-O(F) bond distances, F<sup>−</sup> anions are mainly located on the common vertices of Fe octahedra whereas OH<sup>−</sup> groups occupy mainly the shared edges of the Fe octahedra. Two various highly distorted octahedral sites have been identified with Fe-O/F bond distances varying from 1.90 Å to 2.31 Å. One Fe site is more distorted than in FeO<sub>0.8</sub>OH<sub>1.2</sub>*0.2Cl akaganeite because of the random distribution of F<sup>−</sup>/OH<sup>−</sup>/O<sup>2−</sup> in the vicinity of this Fe cation. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject | Akaganeite | |
| dc.subject | Hollandite | |
| dc.subject | Iron | |
| dc.subject | Oxyhydroxyfluorides | |
| dc.subject | Structure determination | |
| dc.subject | Powder neutron diffraction | |
| dc.subject | Mössbauer spectroscopy | |
| dc.title.en | Investigation of Fe-based oxyhydroxy-fluoride with hollandite-type structure | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.jfluchem.2011.04.005 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of Fluorine Chemistry | |
| bordeaux.page | 690-697 | |
| bordeaux.volume | 132 | |
| bordeaux.issue | 10 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00617194 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00617194v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Fluorine%20Chemistry&rft.date=2011&rft.volume=132&rft.issue=10&rft.spage=690-697&rft.epage=690-697&rft.eissn=0022-1139&rft.issn=0022-1139&rft.au=DEMOURGUES,%20Alain&WATTIAUX,%20Alain&rft.genre=article |
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