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Problem: The unit cell of a compound containing potassium, aluminum, and fluorine is shown here.What is the empirical formula?

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The unit cell of a compound containing potassium, aluminum, and fluorine is shown here.

A rectangular cuboid has K as the corners, Al in the center, and 6 F atoms around the center. The height is 6.18 angstroms and length and width are 3.55 angstroms.

What is the empirical formula?

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