Sunday
April 20, 2014

Homework Help: Urgent Chem help.plz

Posted by Julia on Saturday, January 24, 2009 at 3:03pm.

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 ?

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?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chem - The crystal structure of lithium sulfide (Li2S) is pictured here. (Intro ...
Chemistry - The crystal structure of lithium sulfide (Li2S) is pictured here. ...
Chemistry - The crystal structure of lithium sulfide (Li2S) is pictured here. ...
Chemistry - What is the density of Li2S in grams per cubic centimeter, if the ...
chemistry - Gallium crystallizes in a primitive cubic unit cell. The length of ...
CHemistry....Please help - How would i calculate the density of Li2S in grams ...
CHemistry....Please help...DrBobb - I posted this up yesterday: I have to use ...
Gen Chem - Barium has a radius of 224 pm and crystallizes in a body-centered ...
CHemistry....Please help - How do you find out the coordination number of a ...
General Chemistry - PLEASE ANSWER VERY SOON I AM STUCK! Crystalline silicon has ...

Search
Members