Twinned aragonite crystals found in the bivalvian crossed lamellar shell structure

Abstract

More than ten morphological types of internal microstructure are known to be present in mollusc shells. One of them, crossed lamellar shell structure is widely distributed among bivalves and gastropods. The purpose of this study is to restudy the fine structures of crystals of the crossed lamellar structure by transmission electron microscopy and to find their crystallographic characteristics of the banded structure in the third order lamellae by electron diffraction. -from Authors