Question

In: Chemistry

In Zinc blende structure (a) zinc ions occupy half of the tetrahedral sites (b) each Zn2- ion is surrounded by six sulphide ions (c) each S2- ion is surrounded by six Zn2+ ions (d) it has free structure

In Zinc blende structure______

(a) zinc ions occupy half of the tetrahedral sites

(b) each Zn2- ion is surrounded by six sulphide ions

(c) each S2- ion is surrounded by six Zn2+ ions

(d) it has free site

Solutions

Expert Solution

Explanation :

Zinc sulfide (ZnS) is an unique compound which forms two types of crystalline structures. These two polymorphs are wurtzite and zincblende (also known as sphalerite). Wurtzite has a hexagonal structure, while zincblende is cubic.

The Zn2+ ions are present in the alternative tetrahedral void. Each Zn2+ ion is surrounded tetrahedrally by four S2- ions and each S2- ion is surrounded tetrahedrally by four Zn2+ ions. Thus the structure has 4:4 coordination.

(a) zinc ions occupy half of the tetrahedral sites.

Rakesh answered 2 years ago
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