Question 1: Crystal Lattices Hexagonal Close Packed (HCP) Cubic Close Packed (CCP) Sodium Chloride Zinc Blende...
Question 1: Crystal Lattices
Hexagonal Close Packed (HCP)
Cubic Close Packed (CCP)
Sodium Chloride
Zinc Blende
Wurtzite
a) Draw the structures of all close packing and ionic lattices above.
b) Identify the presence of octahedral and tetrahedral holes between layers. How many of each type of "hole" surround each atom in the lattice?
c) Identify the layers of each structure in the drawings.
d) Write an account of close packed lattice structures.
e) Note the similarities and differences between
Hexagonal Close Packed and Cubic Close Packed
Sodium Chloride and Zinc Blende
Wurtzite and Zinc Blende
f) Identify the relationship between the structure of the ionic lattice and that of the appropriate close packed lattice.
Homework Answers
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Question 1: Crystal Lattices
Hexagonal Close Packed (HCP)
Cubic Close Packed (CCP)
Sodium Chloride
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Hexagonal Close-Packed Structure
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question 1 2 3 4 5 6 7 8 t). Và - H đi, dt 3H8...
question 1 2 3 4 5 6 7 8
t). Và - H đi, dt 3H8 2009/01/06 Name: Student ID: (1) Write down the formula for the relationship between an atom's radius "r" und unit cell length "a" in (a) simple cubic (b) bodysentered cubic, and (c) face-centered cubie (9%) 11,67 ) (2) LiBr has a density of 3.464 g/em, rock salt structure, shown in Figure 1. The atomic weight of Li 6,941 and Br 79.904. Calculate (a) the molar...
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Can you explain which one of A and are the lattice sites and why please? and...
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please? and since there's only A and B does that mean there are
only two primitive lattice vectors or three? (A bit confused here)
Many thanks
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question 1 2 3 4 5 6 7 8
t). Và - H đi, dt 3H8 2009/01/06 Name: Student ID: (1) Write down the formula for the relationship between an atom's radius "r" und unit cell length "a" in (a) simple cubic (b) bodysentered cubic, and (c) face-centered cubie (9%) 11,67 ) (2) LiBr has a density of 3.464 g/em, rock salt structure, shown in Figure 1. The atomic weight of Li 6,941 and Br 79.904. Calculate (a) the molar...
Would you expect UO2 to have the sodium chloride, zinc blende, or fluorite structure? Justify your choice. Based on your answer, determine (a) the lattice parameter, (b) the density, and (c) the packing factor. 9. 4
Would you expect UO2 to have the sodium chloride, zinc blende, or fluorite structure? Justify your choice. Based on your answer, determine (a) the lattice parameter, (b) the density, and (c) the packing factor. 9. 4
52. The structure of a ternary salt consists of anions, X, arranged in a cubic close-packed array (as shown below) and cations A and B (the cations are not shown). Cation A occupies all of the octahedral holes in the lattice. What fraction of the tetrahedral holes must be occupied by cation, B, to give an emprical formula of ABX? A. All of them B. one-half C. one-fourth D. one-eighth
1. Outline the similarities and differences between cubic and hexagonal close-packed arrangements of spheres, paying particular attention to (a) coordination numbers, (b) interstitial holes and (c) unit cells 2. What do you understand by the "band theory of metals'?
Can you explain which one of A and are the lattice sites and why
please? and since there's only A and B does that mean there are
only two primitive lattice vectors or three? (A bit confused here)
Many thanks
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please answer all the questions
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