2) X-ray Diffraction

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Which of the following crystal structures has the lowest packing density?

Hexagonal Close-Packed

Simple Cubic (correct)

Body-Centered Cubic

Face-Centered Cubic

What is the coordination number of atoms in a simple cubic crystal structure?

8

4

12

6 (correct)

Which crystal structure has a single atom at the center of the unit cell?

Hexagonal Close-Packed

Face-Centered Cubic

Body-Centered Cubic (correct)

Simple Cubic

What is the atomic packing factor (APF) of the body-centered cubic (BCC) crystal structure?

0.26 Signup and view all the answers

Which crystal structure is associated with BCC iron?

BCC Signup and view all the answers

What is the modulus of elasticity (E) for BCC iron?

273 GPa Signup and view all the answers

Which crystal system is completely defined by 6 parameters, including the 3 edge lengths and the 3 interaxial angles?

Cubic Signup and view all the answers

What are the Miller indices for a plane with intercepts of (2a, 0, c/∞)?

(200) Signup and view all the answers

Which crystal structure has a coordination number of 12?

Face-Centered Cubic (FCC) Signup and view all the answers

Which crystal structure has a stacking sequence of ABCABC?

Hexagonal Close-Packed (HCP) Signup and view all the answers

Which crystal structure has an Atomic Packing Factor (APF) of 0.74?

Face-Centered Cubic (FCC) Signup and view all the answers

What is the density of Chromium (Cr) with a BCC crystal structure?

7.19 g/cm3 Signup and view all the answers

Which crystal structures are commonly found in metallic materials?

FCC, BCC, and HCP Signup and view all the answers

What does the diffraction angle, θ, in X-ray diffraction allow computation of?

Interplanar spacing, d Signup and view all the answers

What is the purpose of X-ray diffraction analysis?

Comprehensive compositional and structural analysis Signup and view all the answers

What is the suitable radiation for X-ray diffraction?

X-rays Signup and view all the answers

Which type of materials have atoms arranged in periodic, 3D arrays?

All of the above Signup and view all the answers

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. Signup and view all the answers

What is crystallography?

The science of crystals and crystalline materials. Signup and view all the answers

Which type of atomic arrangement occurs for complex structures and rapid cooling?

Noncrystalline Signup and view all the answers

Which of the following is true about Miller Indices?

Miller Indices are used to indicate the atomic packing of crystallographically equivalent planes. Signup and view all the answers

What is the formula for linear density of atoms?

LD = number of atoms / length of direction vector Signup and view all the answers

What is the formula for planar density of atoms?

PD = number of atoms / area of plane Signup and view all the answers

What is the Bragg Equation?

$n\lambda = 2d\sin(\theta)$ Signup and view all the answers

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. Signup and view all the answers

Which one of the following statements is true about properties of single crystals?

Properties of single crystals are anisotropic. Signup and view all the answers

Which one of the following statements is true about properties of polycrystalline materials?

Properties of polycrystalline materials are independent of crystallographic orientation. Signup and view all the answers

Which one of the following statements is true about polymorphism in materials?

Polymorphism refers to the existence of multiple crystal structures in a material. Signup and view all the answers

Which technique is used for crystal structure and interplanar spacing determinations?

X-ray diffraction Signup and view all the answers

What is the volume of the unit cell of lead in cubic meters, given that its atomic radius is 0.175 nm?

$2.45 \times 10^{-29}$ Signup and view all the answers