close

Вход

Забыли?

вход по аккаунту

?

код для вставки
2005
Structure
D 2000
04- 006
High Pressure Study of NH4Pb 2Br 5 Type Compounds. Part 1. Structural Parameters and Their Evolution under High Pressure. — The nature of the interactions
of s2-cations and the possible structure-determining role of the s2 electron pair at ambient and high pressure in several NH4Pb2Br 5-type AB2X5 (A: K, Rb, Cs, In, Tl; B: Sn,
Pb, Sr; X = Cl, Br, I) compounds is studied by high pressure x-ray diffraction as well
as by quantum mechanical methods (DFT-GGA-calculations). Short cation—cation
distances in the NH4Pb2Br5-type structure enable direct cation—cation interactions and
the existence of an ns2-cation in the B-position is crucial for the stability of these structures. The effect of pressure on the structural parameters of these compounds gives new
insights into the interactions of lone pair cations. The pronounced decrease of the cation—cation distances with pressure points to strongly increasing bonding interactions
between the lone pair cations. — (BECKER, D.; BECK*, H. P.; Z. Anorg. Allg.
Chem. 630 (2004) 12, 1924-1932; Inorg. Anal. Chem. Radiochem., Univ. des
Saarlandes, D-66041 Saarbruecken, Germany; Eng.) — Schramke
Документ
Категория
Без категории
Просмотров
0
Размер файла
10 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа