unit cell

简明释义

单位晶格

英英释义

例句

1.In crystallography, a unit cell is the smallest repeating unit of a crystal lattice.

在晶体学中，单元胞是晶体格子中最小的重复单元。

2.A cubic unit cell has equal lengths and angles, forming a perfect cube.

立方单元胞具有相等的边长和角度，形成一个完美的立方体。

3.The dimensions of the unit cell determine the symmetry and properties of the crystal.

单元胞的尺寸决定了晶体的对称性和性质。

4.The concept of a unit cell is essential for calculating the density of a crystal.

单元胞的概念对于计算晶体的密度至关重要。

5.When studying minerals, geologists often analyze the unit cell to understand their structure.

在研究矿物时，地质学家通常分析单元胞以了解它们的结构。

作文

In the field of crystallography, understanding the concept of a unit cell is essential for analyzing the structure of crystals. A unit cell can be defined as the smallest repeating unit that reflects the symmetry and arrangement of atoms in a crystal lattice. This fundamental building block allows scientists to describe the entire crystal structure by repeating the unit cell in three-dimensional space. The unit cell encompasses the dimensions and angles between its edges, which are crucial for determining the crystal's properties. There are several types of unit cells, classified based on their geometry. The most common types include cubic, tetragonal, orthorhombic, hexagonal, monoclinic, and triclinic. Each type has unique characteristics that influence the physical properties of the material. For instance, a cubic unit cell is symmetrical and often found in metals like sodium chloride, which exhibits a simple cubic structure. The importance of the unit cell extends beyond mere structural representation; it plays a critical role in understanding how materials interact with light, heat, and electricity. For example, the arrangement of atoms within a unit cell can affect the material's optical properties, such as refractive index and absorption spectra. This relationship is particularly significant in the development of photonic devices, where precise control over light propagation is required. Moreover, the unit cell is vital in determining the mechanical properties of materials. The strength, ductility, and hardness of a material can often be traced back to the arrangement of atoms within its unit cell. By studying the unit cell, engineers and material scientists can predict how a material will behave under different stress conditions, leading to the design of stronger and more resilient materials. In addition to its applications in engineering and materials science, the concept of the unit cell is also pivotal in the field of chemistry. Understanding the unit cell helps chemists predict how molecules will interact and bond, which is fundamental in drug design and synthesis. For instance, knowing the unit cell structure of a compound can provide insights into its reactivity and stability, guiding chemists in the development of new pharmaceuticals. Furthermore, advancements in technology have allowed researchers to visualize unit cells at the atomic level using techniques such as X-ray diffraction and electron microscopy. These methods enable scientists to determine the precise arrangement of atoms within a unit cell, providing invaluable information for both theoretical studies and practical applications. In conclusion, the unit cell is a fundamental concept in crystallography that serves as the cornerstone for understanding the structure and properties of materials. Its implications stretch across various fields, from engineering and materials science to chemistry and physics. By mastering the concept of the unit cell, researchers can unlock new possibilities in material design and innovation, paving the way for future technological advancements. As we continue to explore the microscopic world, the significance of the unit cell will undoubtedly remain a focal point in scientific research and discovery.

在晶体学领域，理解“unit cell”的概念对于分析晶体结构至关重要。unit cell可以定义为反映晶体格子中原子对称性和排列的最小重复单元。这个基本构建块使科学家能够通过在三维空间中重复unit cell来描述整个晶体结构。unit cell包含了其边缘的尺寸和角度，这对于确定晶体的性质至关重要。有几种类型的unit cells，根据其几何形状进行分类。最常见的类型包括立方体、四方体、正交体、六方体、单斜体和三斜体。每种类型都有独特的特征，影响材料的物理性质。例如，立方体unit cell是对称的，通常在金属如氯化钠中发现，该金属表现出简单的立方体结构。unit cell的重要性不仅限于简单的结构表示；它在理解材料如何与光、热和电相互作用方面也发挥着关键作用。例如，unit cell内原子的排列可以影响材料的光学性质，如折射率和吸收光谱。这种关系在光子设备的开发中尤为重要，因为需要精确控制光的传播。此外，unit cell在确定材料的机械性能方面也至关重要。材料的强度、延展性和硬度往往可以追溯到其unit cell内原子的排列。通过研究unit cell，工程师和材料科学家可以预测材料在不同应力条件下的表现，从而设计出更强大和更耐用的材料。除了在工程和材料科学中的应用外，unit cell的概念在化学领域也至关重要。理解unit cell帮助化学家预测分子如何相互作用和结合，这对于药物设计和合成至关重要。例如，了解化合物的unit cell结构可以提供关于其反应性和稳定性的见解，指导化学家开发新药物。此外，技术的进步使研究人员能够利用X射线衍射和电子显微镜等技术在原子水平上可视化unit cells。这些方法使科学家能够确定unit cell内原子的精确排列，为理论研究和实际应用提供了宝贵的信息。总之，unit cell是晶体学中的一个基本概念，是理解材料结构和性质的基石。它的影响跨越多个领域，从工程和材料科学到化学和物理。通过掌握unit cell的概念，研究人员可以开启材料设计和创新的新可能性，为未来的技术进步铺平道路。随着我们继续探索微观世界，unit cell的重要性无疑将继续成为科学研究和发现的焦点。