Crystal structure of ABPO5 and optical study of Pr3+ embedded in these compounds

被引:5
作者
Ben Ali, A
Antic-Fidancev, E
Viana, B
Aschehoug, P
Taibi, M
Aride, J
Boukhari, A
机构
[1] Lab Physicochim Mat, LAF 502, Rabat, Morocco
[2] ENSCP 11, CNRS, UMR 7574, LCAES, F-75231 Paris 05, France
[3] Fac Sci Rabat, Lab Chim Solide Appl, LAF 501, Rabat, Morocco
关键词
D O I
10.1088/0953-8984/13/42/323
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The crystal structure of borophosphates ABPO(5) (A = alkaline earth or Pb) Was resolved on a polycrystalline sample using the Rietveld method. The x-ray diffraction patterns data show that ABPO(5) crystallize in a centrosymmetric space group P3(1)21 and their structure is related to the borogermanates REBGeO5 with a stillwellite-type structure. Pr3+, ion was used as a local structural probe to corroborate the structural resolution results. Absorption and fluorescence spectra of A(1-x)Pr(x)BP(1-x)Ge(x)O(5) (A = alkaline earth or Pb; x = 0.05) have been investigated at different temperatures. At 9 K the H-3(4) --> (3)p(0) transition of trivalent praseodymium ion (42 configuration) is observed as a Single line. This indicates a unique crystallographic site for the rare earth ion in these compounds replacing the divalent cation. Energy level schemes were deduced from the low-temperature spectroscopic measurements. Comparing the electronic level splittings of studied compounds with the already reported data on REBGeO5 doped with Pr3+ ion, it is possible to dispel the doubt existing about structural determination. Moreover, under 460 nm. excitation, intense red emission of trivalent praseodymium is observed corresponding to D-1(2) --> H-3(4) transition. The lifetime measurements of D-1(2) level have been performed for all the title compounds.
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页码:9663 / 9671
页数:9
相关论文
共 28 条
[1]   THE OPTICAL-PROPERTIES OF EU3+ EMBEDDED IN THE RARE-EARTH BOROGERMANATE MATRIX - REBGEO5 [J].
ANTICFIDANCEV, E ;
SERHAN, K ;
TAIBI, M ;
LEMAITREBLAISE, M ;
PORCHER, P ;
ARIDE, J ;
BOUKHARI, A .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1994, 6 (34) :6857-6864
[2]  
ANTICFIDANCEV E, 1998, J ALLOY COMPD, V424, P275
[3]   UBER EINE REIHE ISOTYPER ERDALKALIBORATPHOSPHATE UND -ARSENATE VOM TYPUS 2MEO.X2O5.B2O3 [J].
BAUER, H .
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1965, 337 (3-4) :183-&
[4]   UBER EINE REIHE ISOTYPER ERDALKALIBORATPHOSPHATE UND -ARSENATE VOM TYPUS 2MEO.X2O5.B2O3 .2. DIE VERBINDUNGEN 2BAO.P2O5.B2O3 UND 2BAO.AS2O5.B2O3 [J].
BAUER, H .
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1966, 345 (5-6) :225-&
[5]  
Baykal A, 2000, CRYST RES TECHNOL, V35, P247, DOI 10.1002/1521-4079(200003)35:3<247::AID-CRAT247>3.0.CO
[6]  
2-9
[7]  
Belokonova E. L., 1991, IAN SSSR NEORG MATER, V27, P556
[8]  
BENALI A, 2001, J ALLOY COMPD, V673, P323
[9]  
Blasse G., 1994, Luminescence Material
[10]  
CALLEGARI A, 1992, NEUE JAHRBUCH MINERA, V49, P1