Question

What are the cation and anion coordination numbers and geometries of the following & explain why...

What are the cation and anion coordination numbers and geometries of the following & explain why all of the ions do not have the same coordination numbers.

Sodium Thallium, Copper (III) Gold, Zinc Blende, Cadmium Iodide, and Cesium Chloride?

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Answer #1
  • Sodium Thallium (tetrahedral)
    • TI+ Coordination number is 5
    • Na-   Coordination number is 5
  • Copper(III) Gold (trigonal planar)
    • Cu+3 Coordination number is 2
    • Au- Coordination number is 2
  • Zinc Blende (tetrahedral geometry)
    • Zn+   coordination number is 4
    • S- coordination number is 4

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  • Cadmium iodide (octahedral)
    • Cd+ Coordination Number is 6
    • I- Coordination Number is 3
  • Cesium Chloride (cubic lattice)
    • Cs+ coordination number is 8
    • Cl- Coordination number is 8
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