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Topic: Chemical Formula from Unit Cell  (Read 5609 times)

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Offline XGen

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Chemical Formula from Unit Cell
« on: July 04, 2012, 06:53:54 PM »


Given that the gray cells are titanium and the red cells are oxygen, how can I determine the coordination numbers of the two elements and the chemical formula?
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Offline UG

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Re: Chemical Formula from Unit Cell
« Reply #1 on: July 04, 2012, 07:26:24 PM »
It looks like the oxygens have 3 nearest titanium atoms attached and the centre titanium atom is surrounded by 6 oxygens. Counting up all the atoms should give chemical formula, I see 4 Ti atoms on the faces and 2 completely inside the unit cell. Then there are 8 corner oxygens and 1 right in the centre.
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Offline XGen

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Re: Chemical Formula from Unit Cell
« Reply #2 on: July 04, 2012, 10:36:32 PM »
Okay, I think with your explanation and further investigation in my textbook I understand. Thanks!
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