Question: The table shows the ionic radii for several cations and anions. Based on the ionic radii data, find the coordination number of these ceramics: a)

The table shows the ionic radii for several cations and anions.

The table shows the ionic radii for several cations and anions. Based on the ionic radii data, find the coordination number of these ceramics:

a) Al2O3

b) SiO2

AP Ba? Table 12.3 lonic Radii for Several Cations and Anions (for a Coordination Number of 6) Tonic Radius Tonic Radius Cation (nm) Anton (am) 0.053 Br 0.196 0.136 CI 0.181 Ca? 0.100 F 0.133 Cs 0.170 0.220 Fert 0.077 0.140 Fe 0.069 0.184 K 0.138 Mg? 0.072 0.067 Na 0.102 0.069 0.040 0.061 Coordination Cation-Anion Coordination Number Radius Ratio Geometry ON $? Mn? Nj? Si T' 2

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