Distance b/w two miller planes

  • Thread starter afrano
  • Start date
  • Tags
    Planes
In summary, the distance between two Miller planes is the shortest distance between any two parallel planes in a crystal lattice. It is calculated using the Miller indices of the planes and the lattice parameters of the crystal. This value is always positive and affects the angle and intensity of diffracted beams in a diffraction pattern. The distance between two Miller planes can vary between materials, influencing their properties.
  • #1
afrano
10
0
I am having a hard time visualizing the distance b/w two Miller planes. I found this article that has a brief explanation:
http://www.mrl.ucsb.edu/~seshadri/2004_100A/100A_MillerBragg.pdf

which derives the common formula for the distance, which can be used for diffraction/crystallography purposes.

Can someone explain how the distance b/w two miller planes boils down to the distance from the origin to the nearest plane?

Thanks:confused:
 
Last edited by a moderator:
Physics news on Phys.org
  • #2
Because all miller planes are equally spaced, and there is always one through the origin.
 
  • #3


Hello,

Thank you for sharing your question about the distance between two Miller planes. I can offer some insight into this topic.

Miller planes are a way to describe the crystal lattice structure of a material. They are imaginary planes that pass through a set of lattice points in a crystal. These planes help us understand the arrangement of atoms in a crystal and how they contribute to the material's properties.

The distance between two Miller planes is an important factor in crystallography because it determines the spacing of the atoms in the crystal. This distance is often measured in units of length, such as nanometers or angstroms.

The article you shared discusses the Miller-Bragg equation, which is a mathematical formula that relates the distance between two Miller planes to the angle of diffraction observed in X-ray crystallography. This equation is commonly used to determine the distance between planes in a crystal.

To answer your question about how the distance between two Miller planes boils down to the distance from the origin to the nearest plane, we need to understand the concept of a unit cell. A unit cell is the smallest repeating unit of a crystal lattice, and it contains all the information about the crystal's structure.

In a crystal lattice, the origin is defined as the point where the three axes of the unit cell intersect. The distance from the origin to the nearest Miller plane is equal to the distance between the origin and the nearest lattice point in the plane. This distance is known as the lattice parameter and can be calculated using the Miller-Bragg equation.

In summary, the distance between two Miller planes is a crucial aspect of crystallography and can be determined using the Miller-Bragg equation. This distance is related to the distance from the origin to the nearest lattice point in the plane, which is known as the lattice parameter. I hope this helps clarify your understanding of the concept.
 

FAQ: Distance b/w two miller planes

1. What is the definition of distance between two Miller planes?

The distance between two Miller planes is the shortest distance between any two parallel planes in a crystal lattice. It is a measure of the spacing between the planes and is important in determining the crystal structure and properties of a material.

2. How is the distance between two Miller planes calculated?

The distance between two Miller planes can be calculated using the Miller indices of the planes and the lattice parameters of the crystal. The formula is d = a / √(h² + k² + l²), where d is the distance, a is the lattice parameter, and h, k, and l are the Miller indices of the planes.

3. Can the distance between two Miller planes be negative?

No, the distance between two Miller planes cannot be negative. It is always a positive value as it represents the physical distance between the planes in a crystal lattice.

4. How does the distance between two Miller planes affect the diffraction pattern?

The distance between two Miller planes determines the angle and intensity of the diffracted beams in a diffraction pattern. The larger the distance, the smaller the diffraction angle and the weaker the intensity of the diffracted beam. This is because a larger distance between planes means a smaller spacing between lattice planes, resulting in a smaller angle of diffraction.

5. Is the distance between two Miller planes constant for all materials?

No, the distance between two Miller planes can vary depending on the crystal structure and lattice parameters of a material. Different materials will have different distances between their Miller planes, which can affect their physical and chemical properties.

Back
Top