Posted by ice cream on Tuesday, October 4, 2011 at 8:44pm.
Try some of the following links for information :
http://search.yahoo.com/search?fr=mcafee&p=what+is+the+crystal+structure+of+solid+europium
Sra
Calculate the mass of a unit cell for each of the three choices. The fcc structure will have the highest mass and density. Note that the atom at each corner of the unit cell is shared by eight cells.
For a simple cubic, the mass of a unit cell of Eu is 152 amu = 3.95*10^-24 g and the density is
2.53*10^-22g/(3.854*10^-8 cm)^3
= 4.42 g/cm^3
That looks like the right answer to me.
UBC wooo go thinderbirds!!
UBC wooo go thinderbirds!!
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