A182567 Decimal expansion of Madelung constant (negated) for calcium fluoride CaF_2.

5, 0, 3, 8, 7, 8, 4, 8, 7, 9, 8, 4, 8, 5, 6, 7, 2, 4, 5, 4, 3, 5, 7, 4, 2, 8, 7, 3, 3, 5, 5, 8, 8, 3, 2, 2, 1, 8, 9, 0, 8, 8, 7, 9, 4, 5, 8, 6, 1, 9, 0, 1, 0, 4, 8, 5, 6, 4, 7, 0, 7, 6, 8, 5, 5, 8, 3, 3, 7, 9, 8, 4, 9, 4, 4, 3, 7, 8, 7, 1, 0, 5, 8, 6, 8, 6, 0, 2, 2, 9, 8, 1, 9, 9, 1, 5, 9, 2, 1, 9, 4, 0, 8

Offset

1,1

Links

Table of n, a(n) for n=1..103.

Leslie Glasser, Solid-State Energetics and Electrostatics: Madelung Constants and Madelung Energies, Inorg. Chem., 2012, 51 (4), 2420-2424.

Wikipedia, Fluorite structure.

Formula

This constant = sqrt(3)/2 * A085469 + 2 * A181152. [Glasser] - Andrey Zabolotskiy, Oct 12 2023

Example

-5.0387848798...

Crossrefs

Cf. A085469, A181152, A182565, A182566.

Sequence in context: A011511 A020856 A299621 * A339457 A300728 A321418

Adjacent sequences: A182564 A182565 A182566 * A182568 A182569 A182570

Keyword

nonn,cons

Author

N. J. A. Sloane, May 05 2012

Extensions

More terms using the formula added by Andrey Zabolotskiy, Oct 12 2023

Status

approved