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2.3 Basic structure types

Sphalerite-type

Crystal data

Formula sum ZnS

Crystal system cubic
Space group F -4 3 m (no. 216) Layer in sphalerite

Unit cell dimensions a = 5.3450 Å

Z 4

Atomic coordinates Stacking sequence

Atom Ox. Wyck. x y z
Zn1 +2 4a 0 0 0

S2 -2 4c 1/4 1/4 1/4

Structural and other features:
Structural and other features:
• diamond-type structure

• 50% of tetrahedral holes in CCP filled
• connected layers, sequence (S-layers): ABC, polytypes

• Zn, S is coordinated by 4 S, (tetrahedra, common corners)

• applications of sphalerite-type structures very important
(semiconductors: solar cells, transistors, LED, laser…)