Pressure dependence of effective ionic charges in alkali halides

Kucharczyk, W.

doi:10.1016/0022-3697(91)90095-h

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Solid-state En As a Function Of Pressure1

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1993

2021

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Cited by 8 publications

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“…In good agreement with this, Batana & Faour (1984), Talwar & Vandevyver (1990) and Kucharczyk (1991) showed by spectroscopic methods that effective atomic charges usually decrease under pressure. Alkali halides show progressive narrowing of the band gap under pressure (Asaumi & Mori, 1983;Jeon et al, 1987) and tend towards metallization.…”

Section: Solid-state En As a Function Of Pressuresupporting

confidence: 79%

Solid-state electronegativity of atoms: new approaches

Бацанов¹,

Batsanov²

2021

Acta Crystallogr Sect B

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Electronegativities (EN) of 65 elements (H to Bi, except lanthanides and noble gases, plus U and Th) in solids were derived from various observed parameters, namely, bond energies in solids, structural geometry, work functions and force constants, yielding a set of internally consistent values. The solid-state electronegativities are generally lower than the conventional (`molecular') values, due to different coordination numbers and electronic structure in a solid versus a molecule; the decrease is stronger for metals than for non-metals, hence binary compounds have a wider EN difference and higher bond polarity (ionicity) in the solid than in the molecular (gaseous) state. Under high pressure, the ENs of metals increase and those of non-metals decrease, the binary solid becomes less polar and can ultimately dissociate into elements.

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