University Paris-Sud, IDES - UMR8148, 91405 Orsay, France.
Micron. 2012 Feb;43(2-3):456-62. doi: 10.1016/j.micron.2011.10.027. Epub 2011 Dec 1.
Crossed-lamellar shell microstructure consists of a sophisticated arrangement of interspersed lamellae, which is very commonly found in Gastropoda or Bivalvia shell layers. Its smallest constitutive microstructural units are usually described as sub-micrometric fibers, or rods, and form very ordered and regular patterns. Atomic force microscopy (AFM) and transmission electron microscopy (TEM) imaging confirms the presence of even smaller building units in the form of organo-mineral granules, and we further investigate their internal structure within aragonite crossed-lamellar internal layer of Nerita undata (Gastropoda, Neritopsina) shell. Their coalescence may have controlled anisotropically the propagation of the crystallographic coherence through this complex microstructure, as suggested by the propagation of the microtwinning pattern between neighboring granules.
交错层状贝壳微结构由交错排列的薄片组成，这种结构在腹足纲或双壳纲贝壳层中非常常见。其最小的组成微结构单元通常被描述为亚微米纤维或棒状结构，并形成非常有序和规则的图案。原子力显微镜（AFM）和透射电子显微镜（TEM）成像证实，甚至更小的建筑单元以有机-矿物颗粒的形式存在，我们进一步研究了它们在 Nerita undata（腹足纲，Neritopsina）贝壳内的方解石交错层内部的内部结构。正如相邻颗粒之间的微孪晶图案的传播所表明的那样，它们的合并可能控制了这种复杂微结构中晶状连贯性的各向异性传播。
