查询词典 crystallographic

Based on the complexes Nd3 2H2O, the crystal of [Nd32] (HMPA = hexamethylphosphoric triamide) has been prepared and its structure has been unequivocally established by an X-ray crystallographic study.

结果显示稀土元素Nd位于配合物分子的中心，分别与六个硫原子和两个氧原子结合，组成了具有扭曲十二面体构型的配合物。

The coordination geometry of the Eu atom is best described as a strongly distorted square-antipyrism.. The two Eu atoms are bridged by two N-oxide oxygen atoms forming a dimeric unit with crystallographic inversions centre. The Eu……Eu distance is 4.2137(9)〓. The two europium atoms and two bridging oxygen atoms is coplanar. The angles of Eu(1)-O(7)-Eu(1A) and O(7)-Eu(1)-O(7A) are 117.82(14)° and 62.18(14)°, respectively. 15 is the first dinuclear triboluminescent lanthanide complex reported.

同时还测定了其摩擦发光光谱与其光致发光光谱，并讨论了晶体结构和摩擦发光活性之间的关系。X-射线结构分析表明，15为有对称中心结构的配合物，每个Eu与三个HTTA的六个O原子和两个PyO的两个O原子形成八配位的四方反锥几何构型，2个N-Oxide O原子桥联两个Eu，形成了一个双核配合物，Eu。。。。

Presents the microstructure evolution in aluminum a nd copper after deformation by cold rolling in the strain range of 10 to 50%red uction using TEM and points out three types of dislocation structures are typica l and two of them are common for both materials and these two common types are f ound in non-cube grains and can be distinguished by crystallographic orientatio n of dislocation boundaries in the grains and the third type of structure is obs erved in cube grains, and concludes that grain orientation is important in deter mining the structure type but some other metallurgical parameters also have a ro le to play.

采用TEM对冷轧多晶铜与多晶铝的形变显微组织演变进行了对比研究。结果发现：多晶铜及多晶铝形变显微组织中均含有三类典型的位错结构类型，其中的两种结构特征在两种材料中是相似的，这两种类型结构存在于非立方取向晶粒，可通过晶粒中位错边界的晶体学取向加以区别，另一类型结构存在于立方取向晶粒；晶粒的晶体学取向决定了其形变显微组织类型，但其它冶金学因素对显微组织也有影响。

It is found that the occupancies of three crystallographic distinct O sites O(1), O(2) and O(3) are 100%, 91.7% and 25%, respectively, consistent with experiments. Each Mo cation is surrounded by four or five O-ions.

研究首次发现结构中Mo有MoO4和MoO5 2种形式的多面体，并且O(1)、O(2)和0(3)3 种氧位置的占有率分别为100%、91.7%和25%，与实验相符。

The emission spectrum of Eu complex in solid state indi-cates the absence of any symmetric element around Eu ion, consistentwith the crystallographic results.

Eu化合物固态荧光光谱表明在Eu离子配位环境是缺乏任何对称元素，这与晶体结构是一致的。

Benzoyl chloride was treated with potassium selenocyanate in dichioromethane by using polyethylene glycal-400 as the solid-liquid phase transfer catalyst to yield the corresponding benzoyl isoselenocyanate. This intermediate did not need to be isolated and directly reacted with arylamines, affording the N-benzoyl-N'-arylselenoureas 2a~2p. These compounds were characterized by IR, 1H NMR spectra and elemental analysis and the single crystal structure of 2k has been confirmed by X-ray crystallographic analysis.

以PEG-400为固液相转移催化剂，通过苯甲酰氯与硒氰酸钾反应合成了中间体苯甲酰基异硒氰酸酯，该中间体不需分离，直接与芳胺反应，得到N-苯甲酰基－N'-芳基硒脲(2a~2p)，这些化合物用1H NMR，IR及元素分析进行了表徵，并用X射线单晶衍射确定了化合物2k的单晶结构。

By use of photoconductive switches triggered by the ultrafast femtosecond pulses in the terahertz time-domain spectroscopy system,the optical phonon oscillation characteristics of isomorphs KTiOPO4 and its crystallographic isomorphs RbTiOPO4 crystals are studied in the 0.5-2.0 THz range.

采用超快半导体光电导开关的宽带太赫兹时域频谱系统，研究了同族的KTiOPO4晶体与RbTiOPO4晶体在0.5-2.0 THz波段的光学声子振荡特性。

More accurate crystallographic parameters and improved mathematical model were used in simulating the formations of 3D plate-shaped or 2D lenticular-shaped Ni4Ti3 variants.

与二维模型相比，本研究采用了准确的晶体学参数及改进的数学模型，获得了更为直观及合理的三维盘状变体及二维透镜状变体； Ni4Ti3沉淀相的长度、宽度和面积分数随时间的变化分别遵循指数、线性和对数关系；且其长度与宽度的比值并非恒定值，在生长初期该比值有较大的增速而随后逐渐减慢，能很好地解释沉淀相盘状及透镜状形貌特征形成的原因并与相关实验结果吻合。

The method is completed at a room temperature, and does not require subsequent heating treatment; and the tungsten trioxide (WO3) nano film prepared is strongly oriented along the [002] crystallographic direction, namely the WO3 nano film is spread along an ab plane and a c- shaft is the film thickness direction.

本发明的方法在室温下完成，无需后续加热处理，所得的三氧化钨(WO 3 )纳米薄膜沿[002]晶向强烈取向，即所得的WO 3 纳米薄膜沿ab平面铺展，c-轴为膜厚方向。

The method takes an ethanol suspension of monocrystal tungsten trioxide (WO3) nano-plates as a precursor, and utilizes the habit that the nano-plate with high diameter-thickness ratio tends to be parallel to a substrate and the principle that solvent volatilization causes the oriented self-assembly of the nano-plate to prepare the tungsten oxide (WO3) nano film which is formed by overlapping the tungsten trioxide (WO3) nano-plates and oriented along the [002] crystallographic direction.

本发明涉及一种取向氧化钨纳米薄膜的制备方法，该方法以单晶三氧化钨(WO 3 )纳米片的乙醇悬浮液为前驱物，利用高径厚比的纳米片趋向平趟于基底的习性，以及溶剂挥发诱发纳米片取向自组装的原理，制得由三氧化钨(WO 3 )纳米片叠加而成的沿[002]晶向取向的三氧化钨(WO 3 )纳米薄膜。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。