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Author Topic: radius ratio  (Read 655 times)

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butlerw2

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radius ratio
« on: February 25, 2013, 06:29:23 PM »

question: the radio ratio for cations and anions just touching eachother when a cation is present within an octahedral hole formed by anions is 0.414. derive the radius ratio for a cation present within a tetrahedral hole formed by anions.

I have seriously no idea how to go about solving this problem. I drew out the structure and uses pythagoreans theorem and it came down to cos45 = 2radius of anion/2 radius of cation + 2 radius of anion. I don't think I even did it right though.
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Schrödinger

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Re: radius ratio
« Reply #1 on: February 28, 2013, 09:25:48 PM »

Can you use Latex and show us exactly what your Right Hand Side looks like? Is the denominator (2radius of cation + 2 radius of anion), or just 2radius of cation?
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Re: radius ratio
« Reply #2 on: February 28, 2013, 10:18:55 PM »

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