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Titolo:
ANALYSIS OF THE ENERGY-LEVELS OF MN2+ IN HALO APATITE STRUCTURES
Autore:
WORTMAN DE; MORRISON CA;
Indirizzi:
USA,RES LAB ADELPHI MD 20783
Titolo Testata:
Optical materials
fascicolo: 4, volume: 4, anno: 1995,
pagine: 487 - 505
SICI:
0925-3467(1995)4:4<487:AOTEOM>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
CALCIUM FLUOROPHOSPHATE; IONS; PHOSPHORS; LOCATION; CENTERS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
45
Recensione:
Indirizzi per estratti:
Citazione:
D.E. Wortman e C.A. Morrison, "ANALYSIS OF THE ENERGY-LEVELS OF MN2+ IN HALO APATITE STRUCTURES", Optical materials, 4(4), 1995, pp. 487-505

Abstract

Reported optical spectra of Mn2+-doped halo apatites are analyzed in octahedral, cubic, and C-3 symmetries. Specifically the apatites dopedwith Mn2+ are Ca10F2(PO4)(6), Cd10Cl2(PO4)(6), Ca10F1.8Cl0.2(PO4)(6),and Sr10F1.8Cl0.2(PO4)6. The cubic approximation was assisted by the use of Tanabe-Sugano-like plots, and the experimental data were averaged for a best analysis where the Slater parameters F-(2) and F-(4) andthe crystal-field parameter B-40 were varied. A point charge calculation of the crystal-field parameters for the C-3 sites in each of the apatites and the resulting crystal-field parameters, B-20, B-40, and B-43, were used as starting values in fitting the reported energy levelsin C-3 symmetry. The parameters that best fit both the cubic approximation and the C-3 symmetry are given for each of the apatite host crystals.

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Documento generato il 01/12/20 alle ore 08:24:09