A novel crystal characterization instrument has been built up in which a combination of X-ray multiple diffraction and X-ray topography is applied to enabling the cross-correlation between micro-crystallographic symme...A novel crystal characterization instrument has been built up in which a combination of X-ray multiple diffraction and X-ray topography is applied to enabling the cross-correlation between micro-crystallographic symmetry and its spatial dependence in relation to lattice defects. This facility is used to examine, in a self-consistent manner, growth sector-dependant changes to both the crystallographic structure and the lattice defects associated with the action of habit-modifying additives in a number of representative crystal growth systems. In addition, the new instrument can be used to probe micro-crystallographic aspects(such as distortion to crystal symmetry) and relate these in a spatially resolved manner to the crystal defect structure in crystals doped with known habit modifiers.展开更多
本文叙述具有较高 X 射线吸收能力的邻苯二甲酸氢钾(KAP)单晶位错的 X 射线形貌衬度。根据(010)晶片中(001)、(201)、(200)和(111)晶面的 X 射线形貌实验结果,提供了位错直接象、衍衬条纹(或中间象)、动力学象和位错双象等衬度、形态以...本文叙述具有较高 X 射线吸收能力的邻苯二甲酸氢钾(KAP)单晶位错的 X 射线形貌衬度。根据(010)晶片中(001)、(201)、(200)和(111)晶面的 X 射线形貌实验结果,提供了位错直接象、衍衬条纹(或中间象)、动力学象和位错双象等衬度、形态以及变化规律。这些实验事实与从结构因子虚数部分所引起的吸收效应等有关理论的计标结果比较,相当满意地符合。展开更多
基金Supported by EPSRC,the UK Research Council(No. GRIR 6 5 787)
文摘A novel crystal characterization instrument has been built up in which a combination of X-ray multiple diffraction and X-ray topography is applied to enabling the cross-correlation between micro-crystallographic symmetry and its spatial dependence in relation to lattice defects. This facility is used to examine, in a self-consistent manner, growth sector-dependant changes to both the crystallographic structure and the lattice defects associated with the action of habit-modifying additives in a number of representative crystal growth systems. In addition, the new instrument can be used to probe micro-crystallographic aspects(such as distortion to crystal symmetry) and relate these in a spatially resolved manner to the crystal defect structure in crystals doped with known habit modifiers.
文摘本文叙述具有较高 X 射线吸收能力的邻苯二甲酸氢钾(KAP)单晶位错的 X 射线形貌衬度。根据(010)晶片中(001)、(201)、(200)和(111)晶面的 X 射线形貌实验结果,提供了位错直接象、衍衬条纹(或中间象)、动力学象和位错双象等衬度、形态以及变化规律。这些实验事实与从结构因子虚数部分所引起的吸收效应等有关理论的计标结果比较,相当满意地符合。
