The crystal structure of cesium chloride (CsCl) is shown in the figure below. The dark spheres represent atoms of Cl.
Identify the crystal system:
Cubic
Tetragonal
Orthorhombic
Rhombohedral
Hexagonal
Monoclinic
Triclinic
Identify the Bravais lattice:
Simple cubic
Body CenteredCubic
Face Centered Cubic
Hexagonal
Identify the basis of the crystal structure:
Simple CubicBody
Centered Cubic
Cs+
Cs+Cl−pair
Cl−
Cubic
Simple cubic
Cs+Cl−pair
Thank you!
How exactly did you work this out? I managed to get the first 2 right, but I could not work out the basis of the crystal structure.
P.S this question is copied word for word in an Edx online course. I do not mind if someone asked HOW to do it, but asking for the answer is a bit lazy. next time, could you please not go and as such a question in such a way? and also, to any OTHER Edx students reading this, please don't cheat. the answers to the question are in the video if you look hard enough, and think hard enough.
To identify the crystal system, Bravais lattice, and basis of the cesium chloride (CsCl) crystal structure, we can follow these steps:
1. Crystal System: The crystal system refers to the symmetry of the crystal structure. To determine the crystal system, we need to analyze the arrangement of atoms within the unit cell. In the case of CsCl, it has a face-centered cubic (FCC) unit cell, which indicates a cubic crystal system.
2. Bravais Lattice: The Bravais lattice represents the translation symmetry of the crystal structure. To determine the Bravais lattice, we need to consider the positioning of lattice points within the unit cell. In the case of CsCl, it has a body-centered cubic (BCC) arrangement of lattice points. Therefore, the Bravais lattice of CsCl is body-centered cubic.
3. Basis: The basis refers to the arrangement of atoms or groups of atoms within the unit cell. For CsCl, the basis consists of two types of ions: Cs+ and Cl-. The Cs+ ion is located at the body center of the unit cell, while the Cl- ion is positioned at the center of each face of the cube. The Cs+ and Cl- ions together form the basis.
To summarize:
- The crystal system of CsCl is cubic.
- The Bravais lattice of CsCl is body-centered cubic.
- The basis of CsCl consists of Cs+ ions at the body center and Cl- ions at the face centers.