S. Constantinescu et D. Tarina, Crystal-chemistry aspects and electric-field-gradient (EFG) dispersion in Ca-gallogermanate-type structures studied by Mossbauer spectroscopy, EUR PHY J B, 13(1), 2000, pp. 75-81
The crystal field disorder in some trigonal germanates of the type X(3-y)Ln
(y)Fe(2+y)Ge(4-y)O(14) (X = Ba, Sr; Ln = La, Nd; y = 0, 1) is studied by Fe
-57 Mossbauer effect. The dispersion of the electric field gradient (EFG) a
t the octahedral sites of these compounds is investigated. A correlation of
the experimental and calculated EFG data with some crystal-chemistry aspec
ts is presented.