查询词典 compound crystal

Since the atomic radius of cerium or yttrium is at the border between the Th〓Ni〓-type and the rhombohedral Th〓Zn〓type structure, the influence of different annealing temperatures on the crystal structure of Ce〓Co〓 and Y〓Co〓 compound was clarified.

测量并获得了这些化合物的晶体结构类型、点阵常数、晶胞体积、居里温度、在5K和300K时化合物的饱和磁化强度和每个Co原子的平均磁矩、各向异性场、各向异性常数、自旋重取向温度以及补偿温度等，并获得了相应化合物的磁相图。

Chemistry the existence of different kinds of crystal of the same chemical compound.

不同种的晶体拥有同一化学组成。

Content The basic concepts of atomic, molecular and crystal structure and coordination compound structure; Macroscopic rule of chemical changes: the first law of thermodynamics, the second law of thermodynamics, the third law of thermodynamics, chemical equilibrium and the rate of chemical reaction; redox reaction

课程目标：无机化学是化工、材料、生物工程等专业学生入校后的第一门化学基础课。通过本课程的学习，使学生掌握无机化学的基本原理和重要元素及其化合物的性质、典型反应等基本知识，并为本专业的其它后继课程提供必要的理论和知识。

Transition metal nitrides belong to a class of interstitial compounds, have the properties of covalence compound, ion crystal and transitional metals.

过渡金属氮化物是一类金属间充型化合物，兼具有共价化合物、离子晶体和过渡金属的性质。

A solid compound containing water molecules combined in a definite ratio as an integral part of the crystal.

水合物结晶中有一定比例水分子成分的固体化合物，其中水分子与晶体的含量为一固定比例

A solid compound containing water molecules combined in a definite ratio as an integral part of the crystal .

水合物结晶中有一定比例水分子成分的固体化合物，其中水分子与晶体的含量为一固定？

In brief, the process involves growing uniform crystals to a certain diameter, thinly slicing the crystal to very precise tolerances, edge rounding the form factors, polishing them into smooth wafers, then carefully packaging the wafers in a class 100/1000 room for shipping to customers. The main advantages of the VGF process include its scalability, low stress, high mechanical strength, and a defect rate that is orders of magnitude lower than conventional compound semiconductor crystal growth processes.

简言之，过程包括成长统一的晶体到某一个直径，薄薄的限制晶体到非常精确的公差，边缘圆整到形态要素，抛光他们成光滑的晶片，然后包装晶体在一个100/1000级别的空间为运输到顾客，VGF过程的主要优点包括，可测量性，低压力，高机械强度和一个比常规化合半导体晶体成长过程数量级低的过失率。

Both were measured using X-ray single crystal diffraction. For the crystal in MeOH, X-ray in compound. In an ansymmetry unit, there are two Cu atoms, two ligands and twosolvent methanol molecules. The tetranuclear complex contains two kinds of Cucenter.

本文在MeOH中得到了阶梯型四核铜骨架配合物；在THF中得到了扭曲的立方烷型四核铜骨架配合物，经晶体结构分析表明，阶梯型四核铜骨架配合物是由两个Cu2被μ~3-剪刀撑二个醇羟基O所连接形成中心对称的二铜二聚体结构。

A chiral phase transfer catalyst, N-benzyl quinine bromide, was synthesized from natural chiral compound. And 2,5-bimethyl-4-(3-nitrobenzene)-1,4-bihydrogenation pyridine-3--4-methyl formate (viz. nitrendipine) was synthesized by this chiral phase transfer catalysis, and characterized by elemental analysis, infrared spectrum,1H nuclear magnetic resornace, and X-ray single-crystal diffraction.Key words: ammonium; chiral phase transfer catalyser; crystal structure

通过对天然手性物质进行修饰合成手性相转移催化剂N-苄基溴化奎宁，并对目标分子2，5-二甲基-4-(3-硝基苯)-1，4-二氢吡啶-3-甲酸乙酯-5-甲酸甲酯进行不对称催化合成，并通过红外光谱和核磁共振氢谱对化合物进行了表征，用X射线单晶衍射法测定了该化合物的晶体结构。

Crystal Data and Data Collection Condition of Ternary Layer Chalcogenides Compound 〓 Formular weight 554.01 553.55 681.15 612.48 874.10 403.95 Crystal system Orth. Orth. Mono. Mono. Mono. Mono.Space group Pnma Pnma 〓〓/m C2/m 〓/c a 17.75(1) 6.480(1) 7.473(2) 7.385(2) 12.821(4) 7.3012(9)b 6.597(4) 3.5638(6) 3.708 (1) 3.750(1) 3.4913(4) 6.3126(6)c 6.567(3) 16.994(4) 10.074(2) 9.988(3) 16.444(2) 8.0023(10)β 106.78(2) 105.74 (2) 91.34 (2) 92.46 (1)V 769.2 (8) 392.5 (1) 267.3 (1) 266.2 (1) 735.9 (2) 368.48 (8)F(000) 1848 932 570 525.26 1488 684Z 8 4 2 2 4 4T 296 296 296 296 296 296Dc. 9.57 9.37 8.46 7.65 7.89 7.28Crystal dimension 0.30×0.25 0.30×0.20 0.20×0.12 0.30×0.10 0.15×0.10 0.15×0.20 × 0.09 × 0.08 × O.05 × 0.06 × 0.04 × 0.23Linear abs.

初步提出碘在相对较低的反应温度下，在富金属层状化合物的合成中可能起着表面传输剂的作用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。