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A247446
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Decimal expansion of Pi*sqrt(3)/16.
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4
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3, 4, 0, 0, 8, 7, 3, 8, 0, 7, 9, 3, 9, 1, 5, 8, 4, 6, 9, 8, 6, 3, 8, 9, 6, 7, 3, 3, 0, 7, 9, 0, 4, 1, 9, 9, 8, 0, 3, 2, 6, 2, 4, 2, 1, 5, 1, 7, 3, 8, 8, 8, 5, 7, 9, 1, 9, 3, 5, 3, 4, 2, 5, 3, 8, 5, 2, 7, 3, 0, 9, 6, 4, 6, 1, 1, 9, 1, 3, 5, 3, 1, 9, 0, 7, 7, 3, 4, 3, 5, 2, 8, 9, 7, 6, 1, 2, 8, 1, 6, 6, 0, 5, 4, 1, 7
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OFFSET
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0,1
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COMMENTS
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The atomic packing factor (APF) of the diamond cubic crystal lattice and the smallest APF among all crystallographic lattices filled by spheres of the same diameter. The APF of the body-centered-cubic (bcc) lattice packed with spheres of the same diameter is twice this value (see Examples). For other crystal lattices, see the cross-refs.
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LINKS
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EXAMPLE
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0.340087380793915846986389673307904199803262421517388857919353425385273...
APF of the bcc lattice packed with spheres of the same diameter:
0.680174761587831693972779346615808399606524843034777715838706850770546...
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MATHEMATICA
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PROG
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(PARI) Pi*sqrt(3)/16
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CROSSREFS
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Cf. APF's of other crystal lattices: A093825 (hcp,fcc), A019673 (simple cubic).
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KEYWORD
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AUTHOR
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STATUS
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approved
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