The crystal structure of lithium sulfide (Li2S) is pictured here. The length of the unit cell is 5.88 x 10^2. For this structure, determine:

Question

(I could not paste the actual picture from the assignment here, but if you go to Google Image and type in "crystal structure of lithium sulfide" the first picture represents the same one on my assignment). - This website would not let me post another internet address. This is why I had to do it this way)!

a)the coordination number of Li and S
b) the number of formula nunits in the unit cell
c) the density of Li2S

Thanks!