Does (111) Plane in BCC Cut Center Atom?

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SUMMARY

The discussion centers on the (111) plane in Body-Centered Cubic (BCC) crystal structures and its relationship with the central atom. It is established that the (111) plane does not intersect the center atom, as confirmed by geometric analysis. The perpendicular distance from the center of the atom to the (111) plane is calculated to be 2/3 of the atomic radius, which is less than the radius itself. However, the consensus is that the plane does not cut through the center of the atom, leading to confusion about whether such atoms should be counted in crystal structure analysis.

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  • Understanding of crystal structures, specifically Body-Centered Cubic (BCC) lattices.
  • Basic knowledge of geometric principles related to planes and distances.
  • Familiarity with atomic radius and its significance in crystallography.
  • Ability to interpret and analyze scientific literature on crystallography.
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  • Research the geometric properties of crystal planes in BCC structures.
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u_know_who
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Hello, as i mentioned i am studying about crystal structure recently, i am facing another problem. In the book it says that :

(111) plane in BCC does not cut the center atom.

But i do some geometry and i come about that the perpendicular distance from the center of that atom to the (111) plane is 2/3 of the radius of atom. So from my point of view it should cut the atom (since the distance is less than the radius of the atom).

Can anyone help me to find out my mistakes?
 
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u_know_who said:
Hello, as i mentioned i am studying about crystal structure recently, i am facing another problem. In the book it says that :

(111) plane in BCC does not cut the center atom.

But i do some geometry and i come about that the perpendicular distance from the center of that atom to the (111) plane is 2/3 of the radius of atom. So from my point of view it should cut the atom (since the distance is less than the radius of the atom).

Can anyone help me to find out my mistakes?
I guess they meant that it doesn't pass through the center of the central atom.
 
So will i take if a plane doesn't pass through the center of the atom we will not count that atom? This thing is not clear in books.
 

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