Using Table 12.2, Table 12.3, Table 12. 4 predict the crystal structure for NiO. (Write out the name of the structure as given in Table 12. 4)
Using Table 12.2, Table 12.3, Table 12. 4 predict the crystal structure for NiO. (Write out the name of the structure as given in Table 12. 4)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Using Table 12.2, Table 12.3, Table 12. 4 predict the crystal structure for NiO. (Write out the name of the structure as given in Table 12. 4)
Transcribed Image Text:Coordination Number
Cation-Anion Radius Ratio
Coordination Geometry
2
<0.155
3
0.155-0.225
0.225-0.414
0.414-0.732
0.732-1.0
Using Table 12.2, Table 12.3, and Table 12.4 predict the crystal structure for NiO. (Write out the name of the structure as given in Table 12.4.)
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Transcribed Image Text:Table 12.4 Summary of Some Common Ceramic Crystal Structures
Coordination Number
Structure Name
Structure Type
Anion Packing
Cation
Anion
Examples
Rock salt (sodium chloride)
AX
FCC
6
6
NaCI, Mgo, Feo
Cesium chloride
AX
Simple cubic
8
8
CsCI
Zinc blende (sphalerite)
AX
FCC
4
4
ZnS, Sic
Fluorite
AX2
Simple cubic
8
4
CaF2, UO2, ThO2
Perovskite
ABX3
FCC
12 (A)
6
BaTiO3, SrZrO3, SrSno3
6 (B)
Spinel
AB2X4
FCC
4 (A)
MgAl204, FeAl204
Table 12.3 lonic Radii for Several Cations and Anions for a Coordination Number of 6
Cation
lonic Radius (nm)
Anion
lonic Radius (nm)
A13+
0.053
Br
0.196
Ba2+
0.136
CI
0.181
Ca2+
0.100
F
0.133
Cs+
0.170
0.220
Fe2+
02-
0.077
0.140
Fe3+
0.069
s2
0.184
K+
0.138
Mg2+
0.072
Mn2+
0.067
Na*
0.102
Nj2+
0.069
0.040
0.061
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