30 Questions
Which of the following crystal structures has the lowest packing density?
Simple Cubic
What is the coordination number of atoms in a simple cubic crystal structure?
6
Which crystal structure has a single atom at the center of the unit cell?
Body-Centered Cubic
What is the atomic packing factor (APF) of the body-centered cubic (BCC) crystal structure?
0.26
Which crystal structure is associated with BCC iron?
BCC
What is the modulus of elasticity (E) for BCC iron?
273 GPa
Which crystal system is completely defined by 6 parameters, including the 3 edge lengths and the 3 interaxial angles?
Cubic
What are the Miller indices for a plane with intercepts of (2a, 0, c/∞)?
(200)
Which crystal structure has a coordination number of 12?
Face-Centered Cubic (FCC)
Which crystal structure has a stacking sequence of ABCABC?
Hexagonal Close-Packed (HCP)
Which crystal structure has an Atomic Packing Factor (APF) of 0.74?
Face-Centered Cubic (FCC)
What is the density of Chromium (Cr) with a BCC crystal structure?
7.19 g/cm3
Which crystal structures are commonly found in metallic materials?
FCC, BCC, and HCP
What does the diffraction angle, θ, in X-ray diffraction allow computation of?
Interplanar spacing, d
What is the purpose of X-ray diffraction analysis?
Comprehensive compositional and structural analysis
What is the suitable radiation for X-ray diffraction?
X-rays
Which type of materials have atoms arranged in periodic, 3D arrays?
All of the above
What is the difference in atomic arrangement between crystalline and noncrystalline solids?
Crystalline solids have atoms arranged in periodic, 3D arrays, while noncrystalline solids have no periodic arrangement.
What is crystallography?
The science of crystals and crystalline materials.
Which type of atomic arrangement occurs for complex structures and rapid cooling?
Noncrystalline
Which of the following is true about Miller Indices?
Miller Indices are used to indicate the atomic packing of crystallographically equivalent planes.
What is the formula for linear density of atoms?
LD = number of atoms / length of direction vector
What is the formula for planar density of atoms?
PD = number of atoms / area of plane
What is the Bragg Equation?
$n\lambda = 2d\sin(\theta)$
Which one of the following statements is true about atomic and planar densities?
Atomic density is related to crystallographic directions, while planar density is related to crystallographic planes.
Which one of the following statements is true about properties of single crystals?
Properties of single crystals are anisotropic.
Which one of the following statements is true about properties of polycrystalline materials?
Properties of polycrystalline materials are independent of crystallographic orientation.
Which one of the following statements is true about polymorphism in materials?
Polymorphism refers to the existence of multiple crystal structures in a material.
Which technique is used for crystal structure and interplanar spacing determinations?
X-ray diffraction
What is the volume of the unit cell of lead in cubic meters, given that its atomic radius is 0.175 nm?
$2.45 \times 10^{-29}$
Test your knowledge on X-ray diffraction with this quiz! Learn about the factors that influence peak intensities and peak shape in materials, including electron density distribution, preferred orientation, defects, crystallite size, and strain. Perfect for those interested in studying thin films, rolling processes, and crystalline materials.
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