Question

percentage of tetrahedral voids occupied by Zn2+ ions per unit cell of ZnS is
(a). 50
(b). 100
(c). 75
(d) 25​

Answer 1

question : percentage of tetrahedral voids occupied by Zn2+ ions per unit cell of ZnS is...

• (a) 50 %
• (b) 100 %
• (c) 75 %
• (d) 25 %

Answer : option (1) 50 %

explanation : Zns exists in two different structure Zinc blend and Wurtzite structures.

in the zinc blend structure, sulphur ions form fcc (face centered cubic) structure and zinc ions (Zn²⁺ ions) occupy half of tetrahedral voids in this structure to maintain neutrality of charge.

in the Wurtzite structure, it is hexagonal where sulphur ions are in an hcp array and one- half of tetrahedral voids are occupied by zinc ions.

you see, zinc ions occupy half of tetrahedral voids means 50% of tetrahedral voids of ZnS unit cell.

Answer 2

Answer:

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