优质和大截面的KDP单晶,利用实验室常规的Lang貌术,一般检测不到任何层状分布的衍射衬度。本文叙述应用双晶衍射的(n,-n)几何排列对弱生长层及其相应的点阵参数相对变化的测量结果。从一对(100)晶片的(600)晶面的对称反射双晶形貌图证实...优质和大截面的KDP单晶,利用实验室常规的Lang貌术,一般检测不到任何层状分布的衍射衬度。本文叙述应用双晶衍射的(n,-n)几何排列对弱生长层及其相应的点阵参数相对变化的测量结果。从一对(100)晶片的(600)晶面的对称反射双晶形貌图证实,呈弱而弥散的层状衬度分布是垂直于 c 轴向的弱生长层,而生长层的点阵参数相对变化的最大范围为0.2～4.5×10~5。展开更多
本文叙述有机物邻苯二甲酸氢钾(KAP)单晶中堆垛层错的 X 射线衍射形貌观测和鉴定结果。层错平面为(1(?)2),正常情况下,它不以自然面显露在单晶外围,当晶体沿正负α轴向的生长速率相差悬殊时,着陆在慢速生长轴端的一对不太发育的(1(?)1)...本文叙述有机物邻苯二甲酸氢钾(KAP)单晶中堆垛层错的 X 射线衍射形貌观测和鉴定结果。层错平面为(1(?)2),正常情况下,它不以自然面显露在单晶外围,当晶体沿正负α轴向的生长速率相差悬殊时,着陆在慢速生长轴端的一对不太发育的(1(?)1)和(11(?))锥面上将偶尔分别显露(1(?)2)和(1(?)2)及(12(?))和(11(?))平面,只有(1(?)2)平面才满足实验观测结果。层错矢量 R 为±1/3〔20(?)〕,恰好位于层错面上。同时简要讨论了松散结构(Open structure)对层错形成的作用。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
The organic crystals of potassium hydrogen phthalate(KAP)(or rubidium hydrogen phthalate(RAP))and thallium hydrogen phthalate(TAP)crystallize out in the same space group of P2_(1)ab.The growth morphological change bet...The organic crystals of potassium hydrogen phthalate(KAP)(or rubidium hydrogen phthalate(RAP))and thallium hydrogen phthalate(TAP)crystallize out in the same space group of P2_(1)ab.The growth morphological change between them has been studied via defective observation and growth theoretical calculation,which indicates that the crystals of KAP and RAP grow through the 2D mechanism and the growth mechanism of(001)faces in TAP changes to defect mechanism.The theoretical results are in good agreement with the experimental ones.展开更多
Imperfections in the(001) plate of rubidium hydrogen phthalate(RAP, RbC8H5O4) crystals have been studied by means of X-ray topography. The main defects are the grown-in dislocations, inclusions, growth layers and the ...Imperfections in the(001) plate of rubidium hydrogen phthalate(RAP, RbC8H5O4) crystals have been studied by means of X-ray topography. The main defects are the grown-in dislocations, inclusions, growth layers and the thermal strain lobes caused by heat. The large thermal strain nature was determined by an Inclusion Probed Method (IPM), which is due to the gradient of the interplanar spacing formed by atomic displacement to <110> directions.展开更多
文摘优质和大截面的KDP单晶,利用实验室常规的Lang貌术,一般检测不到任何层状分布的衍射衬度。本文叙述应用双晶衍射的(n,-n)几何排列对弱生长层及其相应的点阵参数相对变化的测量结果。从一对(100)晶片的(600)晶面的对称反射双晶形貌图证实,呈弱而弥散的层状衬度分布是垂直于 c 轴向的弱生长层,而生长层的点阵参数相对变化的最大范围为0.2～4.5×10~5。
文摘本文叙述有机物邻苯二甲酸氢钾(KAP)单晶中堆垛层错的 X 射线衍射形貌观测和鉴定结果。层错平面为(1(?)2),正常情况下,它不以自然面显露在单晶外围,当晶体沿正负α轴向的生长速率相差悬殊时,着陆在慢速生长轴端的一对不太发育的(1(?)1)和(11(?))锥面上将偶尔分别显露(1(?)2)和(1(?)2)及(12(?))和(11(?))平面,只有(1(?)2)平面才满足实验观测结果。层错矢量 R 为±1/3〔20(?)〕,恰好位于层错面上。同时简要讨论了松散结构(Open structure)对层错形成的作用。
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。
文摘The organic crystals of potassium hydrogen phthalate(KAP)(or rubidium hydrogen phthalate(RAP))and thallium hydrogen phthalate(TAP)crystallize out in the same space group of P2_(1)ab.The growth morphological change between them has been studied via defective observation and growth theoretical calculation,which indicates that the crystals of KAP and RAP grow through the 2D mechanism and the growth mechanism of(001)faces in TAP changes to defect mechanism.The theoretical results are in good agreement with the experimental ones.
文摘Imperfections in the(001) plate of rubidium hydrogen phthalate(RAP, RbC8H5O4) crystals have been studied by means of X-ray topography. The main defects are the grown-in dislocations, inclusions, growth layers and the thermal strain lobes caused by heat. The large thermal strain nature was determined by an Inclusion Probed Method (IPM), which is due to the gradient of the interplanar spacing formed by atomic displacement to <110> directions.
