Sphalerite (ZnS) Is the Chief Ore of Zinc

Multiple Choice

Sphalerite (ZnS) is the chief ore of zinc. In the unit cell of sphalerite, ________

A) all of the octahedral holes are filled with cations.
B) half of the octahedral holes are filled with cations.
C) all of the tetrahedral holes are filled with cations.
D) half of the tetrahedral holes are filled with cations.
E) cations occupy standard atomic positions in the unit cell, not the holes.