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A182566
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Decimal expansion of Madelung constant (negated) for zinc sulfide ZnS.
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2
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1, 6, 3, 8, 0, 5, 5, 0, 5, 3, 3, 8, 8, 7, 8, 9, 4, 2, 3, 7, 5, 0, 0, 3, 4, 7, 7, 6, 3, 5, 8, 6, 1, 9, 4, 6, 5, 3, 6, 0, 1, 7, 9, 6, 6, 3, 1, 3, 6, 6, 5, 7, 8, 8, 3, 9, 5, 7, 6, 4, 4, 6, 2, 3, 9, 2, 7, 7, 0, 6, 8, 1, 2, 8, 3, 7, 2, 2, 3, 1, 3, 7, 6, 9, 8, 5, 4, 6, 4, 2, 0, 0, 4, 3, 4, 9, 4, 6, 6, 5, 1, 6, 1
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OFFSET
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1,2
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COMMENTS
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This constant is for sphalerite, the more common polymorph of zinc sulfide. - Jon E. Schoenfield, Mar 11 2018
The sphalerite (zincblende) structure consists of two interpenetrating face-centered cubic lattices of ions with charges +2 and -2, together occupying all sites of the diamond structure. This constant does not include overall factor 2 from the absolute value of the charges. This constant is normalized to the nearest neighbor distance, not the lattice constant; cf. the values 3.782926104 (or 3.78292610408577750878 from Sarkar & Bhattacharyya) and 7.56584 from pages 41 and 16 of "Lattice Sums Then and Now", which equal 4/sqrt(3) and 8/sqrt(3) times this constant. - Andrey Zabolotskiy, Feb 18 2021
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LINKS
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J. M. Borwein, M. L. Glasser, R. C. McPhedran, J. G. Wan, and I. J. Zucker, Lattice Sums Then and Now, Cambridge University Press, 2013.
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FORMULA
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EXAMPLE
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-1.6380550533887...
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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More terms based on Sarkar & Bhattacharyya and Steiger et al. added by Andrey Zabolotskiy, Jul 16 2023
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STATUS
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approved
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