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Titolo:
MANGANESE IN APATITES, CHEMICAL, LIGAND-FIELD AND ELECTRON-PARAMAGNETIC RESONANCE SPECTROSCOPY STUDIES
Autore:
MAYER I; DIAB H; REINEN D; ALBRECHT C;
Indirizzi:
HEBREW UNIV JERUSALEM,DEPT INORGAN & ANALYT CHEM JERUSALEM ISRAEL UNIV MARBURG,FACHBEREICH CHEM W-3550 MARBURG GERMANY
Titolo Testata:
Journal of Materials Science
fascicolo: 9, volume: 28, anno: 1993,
pagine: 2428 - 2432
SICI:
0022-2461(1993)28:9<2428:MIACLA>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLUORAPATITE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
I. Mayer et al., "MANGANESE IN APATITES, CHEMICAL, LIGAND-FIELD AND ELECTRON-PARAMAGNETIC RESONANCE SPECTROSCOPY STUDIES", Journal of Materials Science, 28(9), 1993, pp. 2428-2432

Abstract

Hydroxapatites precipitated with different amounts of carbonate and Mn2+ were studied. infrared spectra, X-ray diffraction lattice parameters and thermal behaviour indicate that the presence of Mn2+ does not have any effect on the formation and properties of the carbonate apatites obtained. Interaction of apatite with a Mn2+-containing aqueous solution reveals that the molar uptake of Mn2+ by the apatite is higher than the Ca2+ released by it. Ligand-field and electron paramagnetic resonance spectroscopy results show that in Mn2+-doped Cd5(PO4)3Cl, Mn2replaces Ca2+ in the apatite lattice, but in precipitated carbonate apatite it is in an MnO phase. The conclusion that Mn2+, in precipitated carbonate apatites is not incorporated in the apatite crystal is discussed in the light of the size differences between Mn2+ and Ca2+.

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Documento generato il 29/09/20 alle ore 16:03:18