^1,2,3Department of Applied Science & Humanities, R.I.M.T., Bareilly (INDIA)
⁴Department. of Physics, S.I.E.M.T., Mathura (INDIA)
⁵Department of Physics, V.C.T.M., Aligarh (INDIA)
⁶Scientist, I.I.P.A., Dehradoon (INDIA)
Corresponding Author Email:- rajputrsingh@gmail.com

The vibrational constants namely, force constants, compliance constants, coriolis coupling constants and mean amplitudes of vibration have been computed for the octahedral hexa-halogeno anions of 8-10 groups belonging 3d, 4d and 5d series of transition metals using latest vibrational wave numbers. Three modified force fields such as GVFF, MUBFF and MOVFF but we are selected one of them GVFF to compute the force constants. In addition to this compliance constants have been evaluated using the force constants. The mean amplitudes of vibrations are investigated at three temperatures. The trends among the force constants are examined and the results are logically discussed and some useful conclusions are drawn.