From the theoretical calculations of the spin-lattice coupling coefficients \G11\ and \G44\ for Fe3+ replacing an Al3+ ion of the (AlO4)5- group with the cubic symmetry approximation, we find that the observed values of \G11\ and \G44\ for the Fe3+ ion in an andalusite crystal show good agreement with these calculated values. Hence, we think that the Fe3+ ion occupies a distorted fourfold coordinated site in this crystal. This opinion supports a recent reinvestigation of the andalusite crystal structure in which, unlike in previous studies, a fourfold coordinated site of the Al3+ ion was proposed. It appears that the investigation of spin-lattice coupling coefficients are sometimes capable of determining the substitution position of 3d5 ions in crystals and detecting errors in crystal structure determinations.
部门归属
sichuan univ,dept mat sci,chengdu 610064,peoples r china. acad sinica,int ctr mat phys,shenyang 110015,peoples r china.;zheng, wc (reprint author), china ctr adv sci & technol,pob 8730,beijing 100080,peoples r china
W. C. Zheng. DETERMINATION OF THE SUBSTITUTION POSITION OF THE FE3+ ION IN AN ANDALUSITE CRYSTAL FROM THE SPIN-LATTICE COUPLING-COEFFICIENTS[J]. Physics Letters A,1992,166(2):145-147.
APA
W. C. Zheng.(1992).DETERMINATION OF THE SUBSTITUTION POSITION OF THE FE3+ ION IN AN ANDALUSITE CRYSTAL FROM THE SPIN-LATTICE COUPLING-COEFFICIENTS.Physics Letters A,166(2),145-147.
MLA
W. C. Zheng."DETERMINATION OF THE SUBSTITUTION POSITION OF THE FE3+ ION IN AN ANDALUSITE CRYSTAL FROM THE SPIN-LATTICE COUPLING-COEFFICIENTS".Physics Letters A 166.2(1992):145-147.
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