CRYSTAL-STRUCTURE AND MAGNETIC-PROPERTIES OF COR(BO2)(5) (R-Y, GD) AND NIR(BO2)(5) (R-ND, GD)

被引：9
|
作者：
CAMPA, JA
CASCALES, C
PUEBLA, EG
MIRA, J
MONGE, MA
RASINES, I
RIVAS, J
VALERO, CR
机构：
[1] CSIC,INST CIENCIA MAT,E-28006 MADRID,SPAIN
[2] UNIV COMPLUTENSE MADRID,FAC CIENCIAS GEOL,E-28040 MADRID,SPAIN
[3] UNIV COMPLUTENSE MADRID,FAC CIENCIAS QUIM,DIFRACC RAYOS X & CRISTALOG LAB,E-28040 MADRID,SPAIN
[4] UNIV SANTIAGO COMPOSTELA,FAC FIS,DEPT FIS APLICADA,E-15706 SANTIAGO,SPAIN
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 1995年 / 225卷 / 1-2期
关键词：
RARE-EARTH BORATES; NICKEL BORATES; COBALT BORATES; CRYSTAL STRUCTURE; MAGNETIC SUSCEPTIBILITY;
D O I：
10.1016/0925-8388(94)07071-7
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Single crystals of the title berates were grown from mixtures of R(2)O(3), NiO or Co3O4 and a large excess of B2O3. Single-crystal X-ray diffraction showed them to be monoclinic, centrosymmetric space group P2(1)/n (No. 14), Z=4, with cell parameters (in angstroms) a=8.494(2) and 8.560(4), b=7.574(2) and 7.578(2), c=9.364(6) and 9.370(2), and beta=94.03(3)degrees and 93.35(3)degrees for Co berates and R=Y and Gd respectively; the parameters were a=8.617(2) and 8.514(6), b=7.565(3) and 7.554(3), c=9.472(2) and 9.4329(6), and beta=93.46(1)degrees and 93.81(2)degrees for Ni berates and R=Nd and Gd respectively. The crystals studied by X-ray diffraction were analyzed using energy-dispersive X-ray spectroscopy. Magnetic measurements were taken from 300 to 4 K for the four borates.
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页码：225 / 229
页数：5
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