The unit cell for nitinol needs to be determined, if the structure of nitinol consists of a simple cubic array of Ni atoms and an inner penetrating simple cubic array of Ti atoms. Ti atoms are found at the center of the cube of Ni atoms. Concept Introduction: Solids are composed of certain repeating basic units which are called as unit cells. These units represent the arrangement of atoms in a certain manner that repeats itself throughout the solid and make the crystal lattice. Each solid has a different type of unit cell and crystal lattice that makes it unique from other solids. The atoms are arranged in unit cells.

Question

(a 4 shows scanning electron microscope (SEM) images of extruded actions of packing bed for two capillary columns of different diameters, al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the same stationary phase, spherical particles with 1-um diameter. A) When the columns were prepared, the figure shows that the column with the larger diameter has more packing irregularities. Explain this observation. B) Predict what affect this should have on band broadening and discuss your prediction using the van Deemter terms. C) Does this figure support your explanations in application question 33? Explain why or why not and make any changes in your answers in light of this figure. Figure 4 SEM images of sections of packed columns for a) 750 and b) 30-um-i.d. capillary columns.³

Answer 1

Question

Chapter 16, Problem 76E

(a)

Interpretation Introduction

Interpretation: The unit cell for nitinol needs to be determined, if the structure of nitinol consists of a simple cubic array of Ni atoms and an inner penetrating simple cubic array of Ti atoms. Ti atoms are found at the center of the cube of Ni atoms.

Concept Introduction:

Solids are composed of certain repeating basic units which are called as unit cells. These units represent the arrangement of atoms in a certain manner that repeats itself throughout the solid and make the crystal lattice.

Each solid has a different type of unit cell and crystal lattice that makes it unique from other solids. The atoms are arranged in unit cells.

(b)

Interpretation Introduction

Interpretation: Interpret the empirical formula of nitinol if the structure of nitinol consists of a simple cubic array of Ni atoms and an inner penetrating simple cubic array of Ti atoms. Ti atoms are found at the center of the cube of Ni atoms.

Concept Introduction:

Solids are composed of certain repeating basic units which are called as unit cells. These units represents the arrangement of atoms in a certain manner that repeats itself throughout the solid and make the crystal lattice.

Each solid has a different type of unit cell and crystal lattice that makes it unique from other solids. The atoms are arranged in unit cells.

(c)

Interpretation Introduction

Interpretation: Interpret the coordination number of Ni and Ti in nitinol if the structure of nitinol consists of a simple cubic array of Ni atoms and an inner penetrating simple cubic array of Ti atoms. Ti atoms are found at the center of the cube of Ni atoms.

Concept Introduction:

Solids are composed of certain repeating basic units which are called as unit cells. These units represents the arrangement of atoms in a certain manner that repeats itself throughout the solid and make the crystal lattice.

Each solid has a different type of unit cell and crystal lattice that makes it unique from other solids. The atoms are arranged in unit cells.

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