Determine the lattice parameter of Tetragonal system

In summary, the conversation discusses the determination of the lattice parameter for a tetragonal system using XRD peak data. The speaker initially obtained a=b=2.295 and c=3.7469, but doubts the accuracy due to extra peaks. It is suggested to use software such as FullProf or GSAS for more precise results and to simulate the XRD pattern for comparison.
  • #1
ralden
85
0
As a part of our exercise we need to determine the lattice parameter of the given xrd peaks (http://bama.ua.edu/~mweaver/courses/MTE481/Lab2_PP.pdf . the last page of the link), here's the peak data:

2theta
23.73
39.23
46.36
56.69
62.31
71.1
76.15
84.35
89.2
97.29
102.21
110.83
115.9

luckily its a tetragonal system, i tried to determine, the lattice parameter, and i got a=b=
2.295, and c =3.7469, but i doubt that's correct because when i tried to simulate it, there are extra peaks. so guys please help me what to do thanks.
 
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  • #2
To determine the lattice parameters accurately, you should use a software package such as FullProf or GSAS. These programs have optimization algorithms which will help to refine the parameters and give more accurate results than manual calculations. Once you have the optimized parameters, you can then use the software to simulate the XRD pattern for comparison with the experimental data.
 

FAQ: Determine the lattice parameter of Tetragonal system

What is the lattice parameter of a Tetragonal system?

The lattice parameter of a Tetragonal system is the length of the unit cell in the crystal structure. It is typically denoted by the symbol "a" and is measured in units of length, such as angstroms or nanometers.

How is the lattice parameter of a Tetragonal system determined?

The lattice parameter of a Tetragonal system can be determined through various experimental techniques, such as X-ray diffraction or electron microscopy. These methods involve analyzing the diffraction patterns or images produced by the crystal structure to calculate the length of the unit cell.

What factors influence the lattice parameter of a Tetragonal system?

The lattice parameter of a Tetragonal system can be affected by factors such as temperature, pressure, and the presence of impurities. Changes in these conditions can cause the unit cell to expand or contract, resulting in a different lattice parameter.

How does the lattice parameter of a Tetragonal system relate to its crystal structure?

The lattice parameter is an important structural property of a crystal system and is directly related to the arrangement of atoms in the crystal structure. In a Tetragonal system, the lattice parameter is the length of the unit cell in the direction perpendicular to the base, and twice the length of the unit cell in the direction parallel to the base.

Why is it important to determine the lattice parameter of a Tetragonal system?

Knowing the lattice parameter of a Tetragonal system is crucial for understanding its crystal structure and properties. It can also provide valuable information for materials science and engineering applications, as the lattice parameter can affect the strength, stability, and other properties of the material.

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