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1. Name 3 ionic compounds that form CCP with 1/2 octahedral holes (alt).

  • CdCl2, Mg(OH)2, NiBr2
  • CdCl2, MgCl2, NiBr2
  • CdCl2, TiS2, Mg(OH)2
  • CdI2, MgCl2, NiBr2
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2. State the geometry, chemical formula and packing of wurtzite.

  • ZnS, 1/2 Tet + HCP
  • ZnS, Tet + HCP
  • ZnS, 1/2 Tet + CCP
  • ZnS2, 1/2 Oct alt + HCP

3. Name the radius ratio, structure type and cation hole that corresponds to a CN of 4.

  • 0.213-0.414, Fluorite, Rutile, Octahedral
  • 0.225-0.414, Wurtzite, Zinc Blende, Tetrahedral
  • 0.414-0.732, Wurtzite, Zinc Blende, Tetrahedral
  • 0.225-0.414, Wurtzite, NaCl, Octahedral

4. State the geometry, chemical formula and packing of rutile.

  • TiO2, 1/2 Tet + CCP
  • TiO2, 1/2 Oct ord.fram. + HCP
  • TiO, Oct + CCP
  • TiO2, 1/2 Oct ord.fram. + CCP

5. Name 3 ionic compounds that form HCP with 1/2 tetrahedral holes.

  • TiS2, AlN, NH4F
  • ZnS, NiAs, MgF2
  • ZnS, AlN, NH4F
  • ZnS, TiO2, NH4F

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