7. Consider a cubic array of bromide ions in which the anions are touching along the face of the cube. What is the maximum radius (in angstroms) that a cation could have and still fit in the octahedral holes on the edges of the FCC unit cell?

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7. Consider a cubic array of bromide ions in which the anions are touching along the face of the cube. What is
the maximum radius (in angstroms) that a cation could have and still fit in the octahedral holes on the edges
of the FCC unit cell?
Transcribed Image Text:7. Consider a cubic array of bromide ions in which the anions are touching along the face of the cube. What is the maximum radius (in angstroms) that a cation could have and still fit in the octahedral holes on the edges of the FCC unit cell?
Atom
Atomic Radius (pm)
Ionic Radius (pm)
Na
186
95.0
Se
117
191 (Se?)
Cs
265
169
181
196
99.0
Br
114
Zn
135
170.
227
74.0
TI
147 (TI*)
133
184
K
S
104
I
133
220.
Transcribed Image Text:Atom Atomic Radius (pm) Ionic Radius (pm) Na 186 95.0 Se 117 191 (Se?) Cs 265 169 181 196 99.0 Br 114 Zn 135 170. 227 74.0 TI 147 (TI*) 133 184 K S 104 I 133 220.
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