A hypothetical metal with an atomic radius of 0.173 nm has an orthorhombic unit cell for which the a, b, and c lattice parameters are 0.479, and 0.725, and 0.978 nm, respectively. It has an atomic weight of 126.91 g/mol and a theoretical density of 4.99 g/cm3. Determine the APF of the metal. Use NA = 6.022 x 1023. Express your answer in three (3) decimal places.

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