- #1
MightyQuinn11
- 8
- 0
Hello all,
I already have the answer to my question, but what I would like to know is why. My question is: why in the question below is the plane 111 used to find ao and not another plane?
An ordered compound of NiAl has a cubic structure with one formula unit/cell. One Al atom at the origin and one Ni at 1/2 1/2 1/2. The nine lines of lowest bragg angle on a diffraction pattern have d-spacing of: 4.05, 2.86, 2.34, 2.03, 1.81, 1.65, 1.43, 1.35, 1.28.
QUESTION: Evaluate the unit cell dimensions of NiAl.
the formula to use is: dhkl=ao/sqrt(h^2+k^2+l^2)
The answer is: ao= sqrt(3)*2.34= 4.05A
Thank you for any clarification on this topic.
I already have the answer to my question, but what I would like to know is why. My question is: why in the question below is the plane 111 used to find ao and not another plane?
An ordered compound of NiAl has a cubic structure with one formula unit/cell. One Al atom at the origin and one Ni at 1/2 1/2 1/2. The nine lines of lowest bragg angle on a diffraction pattern have d-spacing of: 4.05, 2.86, 2.34, 2.03, 1.81, 1.65, 1.43, 1.35, 1.28.
QUESTION: Evaluate the unit cell dimensions of NiAl.
the formula to use is: dhkl=ao/sqrt(h^2+k^2+l^2)
The answer is: ao= sqrt(3)*2.34= 4.05A
Thank you for any clarification on this topic.