Intermetallische Verbindungen mit HgCl2-isosteren Anionen: Strukturelle und schwingungsspektroskopische Untersuchung von Na4HgP2, K4ZnP2, K4CdP2 und K4HgP2 / Intermetallic Compounds with HgCl2 Isoelectronic Anions: Crystal Structure and Vibrational Spectra of Na4HgP2, K4ZnP2, K4CdP2 and K4HgP2

Author:

Eisenmann B.1,Somer M.2

Affiliation:

1. Eduard-Zintl-Institut der Technischen Hochschule Darmstadt, Anorganische Chemie II, Hochschulstraße 10, D-6100 Darmstadt

2. Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-7000 Stuttgart

Abstract

The new compounds Na4HgP2, K4ZnP2 and K4HgP2 are isotypic and crystallize in the rhombohedral system, space group R3m, Z = 3, with the lattice constants: Na4HgP2: a = 500.8(2) pm, c = 2544.7(8) pm, c/a = 5.081; K4ZnP2: a = 566.4(2) pm, c = 2610.1(8) pm, c/a = 4.608; K4HgP2: a = 567.1(2) pm, c = 2697.7(8) pm, c/a = 4.757. The crystal structure of the compound K4CdP2, formerly described in the monoclinic system (space group C2/m), has been revised (R3m, a = 568.1(2) pm, c = 2698.4(8) pm, c/a = 4.750). Linear units [P—T—P]4- with T = Zn, Cd, Hg, which are isoelectronic to the molecule HgCl2, represent the characteristic structure elements. The far infrared spectra are recorded and assigned on the basis of the [P—T—P]4- anions.

Publisher

Walter de Gruyter GmbH

Subject

General Chemistry

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