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Bonding electrons in orthorhombic potassium perchlorate

1993; Elsevier BV; Volume: 28; Issue: 9 Linguagem: Inglês

10.1016/0025-5408(93)90031-8

1873-4227

Hiroki Sawada,

Solid-state spectroscopy and crystallography

Abstract The crystal structure of KClO4 has been refined with single-crystal MoK α X-ray diffraction intensity data. Difference Fourier maps show four positive residuals due to bonding electrons 0.7A from Cl directed towards oxygen, approximately 0.2A closer to the cation compared to cases previously reported on silicates, reflecting the more covalent nature of the Cl-O bond. The K-O1 2 coordination shows a characteristic comparable to that of isostructural BaSO4 at temperatures higher than 670°C. [Crystal data: KClO4; Formula weight 138.55; Orthorhombic (Pnma); a = 8.8606 (8), b = 5.6676 (5), c = 7.2590 (8) A ; V = 364.54 (6) A 3 ; Z = 4; Dx = 2.52g/cm3; F 000 = 272; μ (MoKα) = 20.40cm−1; T = 301K]