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# q2f04 - 4 Miller indices of a plane and a direction normal...

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Quiz 2 1. A material wherein atoms are positioned in a short range repetitive arrangement confined to first nearest neighbors only is a. amorphous b. crystalline ( a ) 2. A base centered cubic lattice unit cell is not permitted because a. it does not satisfy the translational symmetry b. it does not satisfy the rotational symmetry of a cubic system c. it exhibits no symmetry ( b ) 3. Packing efficiency is an indication of the a. volume of the unit cell b. volume of the atoms c. volume of the filled space present in the crystal ( c)
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Unformatted text preview: 4. Miller indices of a plane and a direction normal to that plane in cubic system are a. large b. same c. different ( b ) 5. The direction along which atoms touch each other in face centered cubic crystal is a. along cube edge b. along the face diagonal c. along the body diagonal ( b ) 6. Bonus: That h+k+l should be even to observe a peak in X-ray diffraction pattern of a bcc crystal is a result of a. constructive interference of the X-rays reflected from different planes b. the amplitude of the X-rays scattered by different atoms in the unit cell is not zero c. the material not to be amorphous ( b )...
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q2f04 - 4 Miller indices of a plane and a direction normal...

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