The crystal structure of lithium sulfide (Li2S) is pictured here. (Intro 1 figure) The edge length of the unit cell is 5.88*10^2^2 pm.
i guess it is FCC ( face cenred cubic)
1--
What are the coordination numbers of and Li^+ and S^2- in the lithium sulfide crystal shown? Enter the values in order of Li^+ and S^2-, respectively.
Ans... i though it shld be 4,4 .. but it says " Face ions are shared between two unit cells."...
plz someone
2- How many formula units are in the unit cell shown for Li2S ?
Ans- i gues it shld be 1 but it says -
The formula represents one formula unit. How many sets of are in the unit cell?
1) 4,8
2) 4
The Number of Formula Units is 4, but I don't know why, I just happened to guess it and it marked it as correct for me.
As for part 1, I don't know :(