The title compounds FeHg(SCN)(4) and MnHg(SCN)(4) were synthesized and thei
r structures were determined by single crystal X-ray diffraction analysis.
Irradiated with a 1064 nm Nd: YAG laser beam, the powdered crystals of FeHg
(SCN)(4) show a 532 nm second harmonic intensity of 0.6 times that of urea
which was taken as standard sample, whereas the powdered crystals of MnHg(S
CN)(4) show a second harmonic intensity of 18 times that of urea. The latte
r shows a quite promising application value as a useful nonlinear optical m
aterials.