Transformation of amorphous calcium phosphate to crystalline dahillite in the radular teeth of chitons.
A comparison of infrared spectra from individual teeth along the radula of a chiton (Polyplacophora, Mollusca) shows that the first-formed calcium phosphate mineral is amorphous. Over a period of weeks the mineral transforms to dahllite. The c axes of the dahllite crystals are aligned approximately perpendicular to the tooth surface.
Lowenstam
H A
HA
Weiner
S
S