(c) The linear density, LD, of an atom is given by the equation = Matems, where Natoms is the number of atoms and Lay is the unit length of the direction vector, both taken on a particular plane. Calculate the linear density of an aluminium atom with a lattice parameter of 4.05 x 10"m and in a [110] direction.
(c) The linear density, LD, of an atom is given by the equation = Matems, where Natoms is the number of atoms and Lay is the unit length of the direction vector, both taken on a particular plane. Calculate the linear density of an aluminium atom with a lattice parameter of 4.05 x 10"m and in a [110] direction.
Understanding Motor Controls
4th Edition
ISBN:9781337798686
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter44: Semiconductors
Section: Chapter Questions
Problem 4RQ
Related questions
Question
Answer part c
![estion Four
Explain why the average density of metals is higher than that of ceramics or polymers i.e pmetals >
(a)
Peramics > Ppolymers.
(b) Copper crystallises as FCC (face centred cubic). Given that the atomic radius and mass of a given copper
sample are 1.28 x 10:10 m and 64.15 g respectively, calculate the density of the copper sample. Take
Avogadro's number, NA = 6.023 x 1023 atoms/mole.
(c) The linear density, LD, of an atom is given by the equation =
Natoms
where Natoms is the
Ldv
number of atoms and Lav is the unit length of the direction vector, both taken on a particular plane.
Calculate the linear density of an aluminium atom with a lattice parameter of 4.05 x 1010 m and in a
[110] direction.
(d) Using neat sketches, show the difference between a triclinic and hexagonal crystal systems.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe22533b2-8abf-4d53-b5e8-a251bdfccef3%2F31ae6188-b6ed-4b7c-a72e-ed64955c393d%2Fp8ee9lw_processed.jpeg&w=3840&q=75)
Transcribed Image Text:estion Four
Explain why the average density of metals is higher than that of ceramics or polymers i.e pmetals >
(a)
Peramics > Ppolymers.
(b) Copper crystallises as FCC (face centred cubic). Given that the atomic radius and mass of a given copper
sample are 1.28 x 10:10 m and 64.15 g respectively, calculate the density of the copper sample. Take
Avogadro's number, NA = 6.023 x 1023 atoms/mole.
(c) The linear density, LD, of an atom is given by the equation =
Natoms
where Natoms is the
Ldv
number of atoms and Lav is the unit length of the direction vector, both taken on a particular plane.
Calculate the linear density of an aluminium atom with a lattice parameter of 4.05 x 1010 m and in a
[110] direction.
(d) Using neat sketches, show the difference between a triclinic and hexagonal crystal systems.
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