A Lanthanum (atomic mass 138.91 g/mol) sample has a lattice parameter 3.77Å. Assume it contains 514 vacancies per 200 unit cells. Calculate (a) the number of vacancies per cm³, (b) density of the sample and (c) compare the number of vacancies per unit cell between the sample given and a perfect Lanthanum sample. Assume T=400C.*

A Lanthanum (atomic mass 138.91 g/mol) sample has a lattice parameter 3.77Å. Assume it contains 514 vacancies per 200 unit cells. Calculate (a) the number of vacancies per cm³, (b) density of the sample and (c) compare the number of vacancies per unit cell between the sample given and a perfect Lanthanum sample. Assume T=400C.*

Understanding Motor Controls

4th Edition

ISBN:9781337798686

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter44: Semiconductors

Section: Chapter Questions

Problem 4RQ

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