SrF₂ crystallizes such that the Sr²⁺ ions are in a face-centered cubic arrangement and the F^- ions are in the holes of the lattice (fluorite structure). How many F^- ions are present in one unit cell of this crystal A) 1 B) 2 C) 4 D) 6 E) 8

Question

Quizplus · Accepted Answer

In a fluorite structure, the cations (in this case, Sr²⁺) occupy the face-centered cubic positions, and the anions (F^-) occupy all the tetrahedral holes. A face-centered cubic unit cell has 8 tetrahedral holes, so there are 8 F^- ions in one unit cell.

SrF2 Crystallizes Such That the Sr2+ Ions Are in a Face-Centered

SrF₂ Crystallizes Such That the Sr²⁺ Ions Are in a Face-Centered