Answer
Sulpher atom represented in the unit cell :
$(0,0,0),(0,0,1),(0,1,0),(1,0,0),(0,1,1),(1,0,1),(1,1,0),(1,1,1),
(\frac{1}{2},0,\frac{1}{2}),(0,\frac{1}{2},\frac{1}{2}),(\frac{1}{2},\frac{1}{2},0),(1,\frac{1}{2},\frac{1}{2}),(\frac{1}{2},1,\frac{1}{2}),(\frac{1}{2},\frac{1}{2},1)$
Zinc atom represented in the unit cell:
$(\frac{3}{4},\frac{1}{4},\frac{1}{4}),(\frac{1}{4},\frac{1}{4},\frac{3}{4}),(\frac{1}{4},\frac{3}{4},\frac{1}{4}),(\frac{3}{4},\frac{3}{4},\frac{3}{4})$
Work Step by Step
Sulpher atom represent in the unit cell :
$(0,0,0),(0,0,1),(0,1,0),(1,0,0),(0,1,1),(1,0,1),(1,1,0),(1,1,1),
(\frac{1}{2},0,\frac{1}{2}),(0,\frac{1}{2},\frac{1}{2}),(\frac{1}{2},\frac{1}{2},0),(1,\frac{1}{2},\frac{1}{2}),(\frac{1}{2},1,\frac{1}{2}),(\frac{1}{2},\frac{1}{2},1)$
Zinc atom represent in the unit cell:
$(\frac{3}{4},\frac{1}{4},\frac{1}{4}),(\frac{1}{4},\frac{1}{4},\frac{3}{4}),(\frac{1}{4},\frac{3}{4},\frac{1}{4}),(\frac{3}{4},\frac{3}{4},\frac{3}{4})$