The document discusses the crystallization of ionic compounds, specifically sodium chloride (NaCl), in a cubic closest packed structure with cations filling octahedral holes. It also examines how defects, such as missing ions, can affect the density of the crystal and poses questions related to the crystal structure. Additionally, it explores the arrangement of ions in relation to various compounds, highlighting the positions of anions and cations.

1. ionic compounds crystallize in a cubic closest packed array of anions and with cations filling the
14. Binary available holes. es in a closest packed array of chloride ions with sodium cations in all
the octahedral holes. he net number of Na and Cl ions in the NaCI unit cell. (2pts) Determine t of
defect in crystal structure changes the density of crystal. A crystal of NaCI has a density The
prese in the absence of defect. Suppose a crystal of NaCl is grown in which 1.50% of Na" and f
2.16are missing. What is the density of NaCl crystal in this case? (2pts) CdS, anction of the
tetrahedral holes is occupied for each case? (3pts) is Cl a 7a all can be described as cubic closest
packed anions with the cations in tetrahedral (c) Na2O, CdS, and Zrls al
Solution
As NaCl is in CCP.
so chloride ions will occupy corners and body center.
So there will be 2 chloride and 2 sodium ions.