Both IS and QS are customarily given in terms of the source velocity in mm/s (Murad 2006; Gill et al. 2011).
According to Rancourt’s (1998) Mössbauer parameters
(in clay samples), IS values are in the range of ≈1.0–1.3
mm/s and QS values are in the range of ≈1.5–3.0 mm/s
for Fe+2 cations (ferrous). On the other hand, IS values are
in the range of ≈0.2–0.4 mm/s and QS values are in the
range of 0.0–1.5 mm/s for Fe+3 cations (ferric). The results
obtained from the Mössbauer parameters of E-3 talc show