地质学报2017，Vol.91Issue(10)：2231-2239,9.
海水鲈鱼硬体组织中羟基磷灰石的结晶特性
Crystallographic Characteristics of Hydroxylapatite in Hard Tissues of Seawater Lateolabrax Japonicus
摘要
Abstract
Biominerals exist in scale,fin and tooth of seawater Lateolabrax Japonicus.In this paper,the crystallographic characteristics of the inorganic mineral phase existing in scale,tooth and bone (fin,sphenoid,backbone) from seawater Lateolabrax Japonicus were investigated by means of X-ray micro diffractometry (XRMD),transmission electron microscopy (TEM),environmental scanning microscopy (ESEM) and energy dispersive spectrometry (EDS).XRMD can well help to obtain valuable structure information by ways of in-situ and non-destruction measurements,and hence it is a more suitable method than powder diffraction in biomineral studies.The results show that the crystal phase in these hard tissues is sole hydroxylapatite (HAP).The chemical composition characteristics of HAP in hard tissues is lack of Ca and rich in P except sphenoid.Refined lattice parameters of HAP show that in scale:a =0.94210.9461nm and c=0.6844 0.6907nm and the closer to the scale base,the value of lattice parameters is closer to that of the scale base,in bone:a=0.9438 0.9492nm and c=0.6873 0.6887nm and in tooth:a=0.9470nm and c=0.6883nm.The coherent domain sizes calculated from the Scherrer equation are Dscale =9.4～14.1nm,Dbone=16.2～18.3nm and Dtooth =15.1nm.From bone to tooth to scale it shows a crystallinity sequence from good to poor.X-ray diffraction patterns and textural index R values indicate that all HAPs in hard tissues of Lateolabrax Japonicus have a preferring orientation along crystallographic c axis.The crystallographic charateristics of biominerals (grain size,crystallinity and preferring orientation) are designed by tissue function and controlled by organic matrix to provide good mechanical performance.关键词
X射线微区衍射/羟基磷灰石/结晶度/择优取向/生物调控/机械性能Key words
X-ray micro diffraction/hydroxylapatite/crystallinity/preferring orientation/biological control/mechanical performance引用本文复制引用
苑蕾,王河锦,安佳丽..海水鲈鱼硬体组织中羟基磷灰石的结晶特性[J].地质学报,2017,91(10):2231-2239,9.基金项目
本文为国家自然科学基金(批准号:41372061,40972038)资助的成果. （批准号:41372061,40972038）
