Home/ Questions/Q 794
Next
In Process
Saidinesh
Iron
Asked: 2020-04-18T23:55:21+05:30 In:

Is it possible base centred cubic? Justify the statement whether it is yes or no

Is it possible base centred cubic? Justify the statement whether it is yes or no
Share

    You must login to add an answer.

    Need An Account,

    5 Answers

    1. Platinum GATE Metallurgy Coaching | Faculty with 7 years of Teaching Experience | 50% of Selections in all PSUs

      Base centered Cubic does not exist for the following reasons It violates Cubic crystal symmetry (Rotational) when (111) is rotated along [111] direction (please refer our article on Crystal Selection Rules today evening) It is same as Simple Tetragonal Unit Cell as shown below (join the lattice poinRead more

      Base centered Cubic does not exist for the following reasons

      1. It violates Cubic crystal symmetry (Rotational) when (111) is rotated along [111] direction (please refer our article on Crystal Selection Rules today evening)
      2. It is same as Simple Tetragonal Unit Cell as shown below (join the lattice points in a different fashion

      3. There are a few arguments that Base centered Cubic is the same as a Simple Cubic with 2 lattice points in the Basis. However, this argument does not work if the Base Centered atoms are different from the corner atoms. However, the argument is interesting. If you pair a Red & Blue atom into one, you can see that such a basis forms a Simple Cubic

       

      See less
      • 4
    2. Platinum⭐ Gate aspirant.
      This answer was edited.

      No, a base centred cubic is not possible. There are 2 explanations for this: The unit cell method: By this if we consider a different unit cell we will end up with Primitive tetragonal system. 2) Symmtery method: The more reliable one, according to this a Cubic system must have 3-fold symmetry. If wRead more

      No, a base centred cubic is not possible.

      There are 2 explanations for this:
      The unit cell method: By this if we consider a different unit cell we will end up with Primitive tetragonal system.

      2) Symmtery method: The more reliable one, according to this a Cubic system must have 3-fold symmetry. If we rotate a base centred cubic 3-fold(120°),we can see that crystal changes and hence it doesn’t hav a 3-fold symmetry, instead it have a 4-fold symmetry which shows it is Tetragonal system.

      So cubic end centred is not possible by either two methods.

      See less
      • 3
    3. Copper

      This answer is edited Do you need further more details just go through  Dr. Rajesh Prasad nptl videos..

      This answer is edited

      Do you need further more details just go through  Dr. Rajesh Prasad nptl videos..

      See less
      • 1
    4. Platinum

      Base centered cubic is not pissible because it violates the cubic symmetry.

      Base centered cubic is not pissible because it violates the cubic symmetry.

      See less
      • 0
    5. Copper Undergrad. in Metallurgical and Materials Engineering from Malaviya National Institute of Technology, Jaipur

      Base Centered Cubes doesn't exist because it violates symmetry rules. To get better clarification you can watch https://www.youtube.com/playlist?list=PLfIFNJ1DPG4nRLP5qsXn1UWTgAyysZE6- (videos- 6,7,8,9)

      Base Centered Cubes doesn’t exist because it violates symmetry rules.

      To get better clarification you can watch https://www.youtube.com/playlist?list=PLfIFNJ1DPG4nRLP5qsXn1UWTgAyysZE6- (videos- 6,7,8,9)

      See less
      • 0