The correct order of the packing efficiency in different types of unit cells is _______?
Crystal structure

Quiz
•
Physics, Chemistry
•
University
•
Hard
Dr. phy
Used 68+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
fcc < bcc < simple cubic
fcc > bcc > simple cubic
fcc < bcc > simple cubic
bcc < fcc > simple cubic
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following statements about lattices and unit cells is correct?
A unit cell contains a whole number of complete molecules
Lattice points are chosen to lie on atoms.
Lattice points all have identical surroundings
Unit cells are constructed by connecting adjacent lattice points to give the largest possible repeat unit.
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Consider the Bragg equation. If the value of the wavelength is doubled, which of the following is NOT true?
Bragg angles of reflections increase.
The d spacings become smaller.
The diffraction pattern expands.
Some previously accessible reflections can no longer be measured.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Repeatable entity of a crystal structure is known as
Crystal
Lattice
Unit cell
Miller indices
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Coordination number for closest packed crystal structure
16
12
8
4
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Atomic packing factor is
Distance between two adjacent atoms
Projected area fraction of atoms on a plane
Volume fraction of atoms in cell
None
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Coordination number in simple cubic crystal structure
8
6
12
10
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