A182565 Decimal expansion of Madelung constant (negated) for cuprous oxide Cu_2O.

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

Offset

1,1

Links

Table of n, a(n) for n=1..105.

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

Yosio Sakamoto, Madelung Constants of Simple Crystals Expressed in Terms of Born's Basic Potentials of 15 Figure, The Journal of Chemical Physics 28, 164 (1958). See Table III, row C3, column M_r.

Wikipedia, Copper(I) oxide.

Formula

Equals (sqrt(3)/4) * (2 * A085469 + 3 * (A185577 + A185578)). [Sakamoto] - Andrey Zabolotskiy, Oct 12 2023

Example

-4.4424752098389...

Crossrefs

Cf. A085469, A181152, A182566, A182567, A185577, A185578.

Sequence in context: A109610 A067395 A213274 * A016708 A105724 A063448

Adjacent sequences: A182562 A182563 A182564 * A182566 A182567 A182568

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