The crystal structure of the compound CeNi5Sn has been studied by time
-of-flight neutron diffraction at room temperature. The hexagonal stru
cture of this compound was confirmed and the site occupancy of the Ni
and Sn compounds was studied in more detail. The neutron diffraction d
ata show that only the 2b and 2c site are exclusively occupied by Ni a
toms whereas Ni shares the other non-rare earth sites with Sn. (C) 199
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