Table 1.

Best-fit parameters used to represent the reflectivity curves in Ca²⁺-free and Ca²⁺-loaded buffer.

common parameters
σSi→HC (Å)	2.3
ρHC (e− Å−3)	0.19
dHC (Å)	26.9
free parameters	Ca2+-free	Ca2+-loaded
σHC→S (Å)	2.9	2.6
ρS (e− Å−3)	0.47	0.57
dS (Å)	10.7	7.8
Λ (Å)	34.4	15.6
h	0.30	0.68