File talk:Corundum-3D-balls.png

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Proportion of red to grey balls[edit]

The stick diagram has the proportion 2:1 of red-balls and grey balls. This does not seem to illustrate the formula AL2O3. A clarifying statement would be helpful. — Preceding unsigned comment added by 76.192.50.27 (talk) 20:09, 9 Oct 2010 (UTC)