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FIZIKA A 5 (1996) 1, 41-47
 
DIAMAGNETIC ANISOTROPY AND MOLECULAR STRUCTURE OF ISOMORPHOUS
TRIHALOGENBENZENIC CRYSTALS
MOHAMED GAAFAR
Physics Department, Faculty of Science, Alexandria University, Egypt
Received 18 April 1995
Revised manuscript received 5 October 1995
Measurements of the crystal diamagnetic susceptibilities of isomorphous
trihalogenbenzenic crystals C6H3X3 (X = Cl, Br) of
orthorhombic structure are reported. Molecular components, as diagonal values in crystal
molecular tensor relation are deduced and their variancies are discussed. The measurements
show that the molecular structure of these related crystals is of layer type, the
molecules being planar in the vicinity of the (001) plane. Effects of partial substitution
of halogen ions on the magnetic properties and on the packing forces of these crystals are
also discussed. Reduction of the molecular anisotropies were observed and reduction of the
molecular orbital areas were expected.
UDC 538.955
PACS 75.20.-g, 75.30.Gw
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