Explanation The relation of the lattice parameter and the radius of the atom of ZnS is given as, 3 a 0 = 4 r Z n + 2 + 4 r S + 2 With the appendix B values, r Z n + 2 = 0. 074 nm r S + 2 = 0.18 4 n m Substituting the values, 3 a 0 = 4 r Z n + 2 + 4 r S + 2 = 4 ( 0.074 ) + 4 ( 0.184 ) a 0 = 0.5 96 nm The formula for the packing factor is given as follows, Packing factor ( 110 ) = (atoms area per face) (area of face) = ( 2 ) ( π r Z n + 2 2 )+ ( 2 ) ( π r S − 2 2 ) 2 a 0 a 0 = ( 2 ) ( π 0.074 2 )+ ( 2 ) ( π 0.184 2 ) 2 ( 0.596 ) ( 0.596 ) ⇒ 0.492

Essentials of Materials Science and Engineering, SI Edition

4th Edition

ISBN: 9781337672078

Author: ASKELAND, Donald R., WRIGHT, Wendelin J.

Publisher: Cengage Learning

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Question

Chapter 3, Problem 3.91P

Interpretation Introduction

Interpretation:

The ion arrangement is sketched for the ZnS phase and compare it with the CaF2 plane.

Concept introduction:

Ionic compounds are chemical compounds that is made of ions. These ions are formed together by the ionic bonding which has the electrostatic force of attraction. The chemicals compound is completely neutral and consists of cations that are positively charged ions and anions that are negatively charged ions. The above defines the ionic compound arrangement.

Expert Solution & Answer

Chapter 3 Solutions

Essentials of Materials Science and Engineering, SI Edition

Ch. 3 - Prob. 3.1P Ch. 3 - Prob. 3.2P Ch. 3 - Prob. 3.3P Ch. 3 - Prob. 3.4P Ch. 3 - Prob. 3.5P Ch. 3 - Prob. 3.6P Ch. 3 - Prob. 3.7P Ch. 3 - Prob. 3.8P Ch. 3 - Prob. 3.9P Ch. 3 - Prob. 3.10P

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