Table 12.3 Ionic Radii for Several Cations and Anions for a Coordination Number of 6 Cation Ionic Radius (nm) Аnion Ionic Radius (nm) Al3+ 0.053 Br 0.196 Ва2+ 0.136 Cl 0.181 Ca2+ 0.100 F 0.133 Cs 0.170 0.220 Fe2* 0.077 02- 0.140 Fe3+ 0.069 S2- 0.184 Kt 0.138 Mg2 0.072 Mn2+ 0.067 Na* 0.102 Ni2+ 0.069 Si4+ 0.040 Ti4+ 0.061

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Iron titanate, FeTiO3, forms in the ilmenite crystal structure that consists of an HCP arrangement of O2- ions.

(a) Which type of interstitial site will the Fe2+ ions occupy?

(b) Which type of interstitial site will the Ti4+ ions occupy?

(c) What fraction of the total tetrahedral sites will be occupied? (In decimal form to two places to the right of the decimal)

(d) What fraction of the total octahedral sites will be occupied? (In decimal form to two places to the right of the decimal)

Table 12.3 Ionic Radii for Several Cations and Anions for a
Coordination Number of 6
Cation
Ionic Radius (nm)
Аnion
Ionic Radius (nm)
Al3+
0.053
Br
0.196
Ва2+
0.136
Cl
0.181
Ca2+
0.100
F
0.133
Cs
0.170
0.220
Fe2*
0.077
02-
0.140
Fe3+
0.069
S2-
0.184
Kt
0.138
Mg2
0.072
Mn2+
0.067
Na*
0.102
Ni2+
0.069
Si4+
0.040
Ti4+
0.061
Transcribed Image Text:Table 12.3 Ionic Radii for Several Cations and Anions for a Coordination Number of 6 Cation Ionic Radius (nm) Аnion Ionic Radius (nm) Al3+ 0.053 Br 0.196 Ва2+ 0.136 Cl 0.181 Ca2+ 0.100 F 0.133 Cs 0.170 0.220 Fe2* 0.077 02- 0.140 Fe3+ 0.069 S2- 0.184 Kt 0.138 Mg2 0.072 Mn2+ 0.067 Na* 0.102 Ni2+ 0.069 Si4+ 0.040 Ti4+ 0.061
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