The first high-pressure chromium oxonitridoborate CrB4O6N - an unexpected link to nitridosilicate chemistry

  • CrB4O6N crystallizes in the non-centrosymmetric space group P63mc (no. 186) with the lattice parameters a=5.1036(1), c=8.3519(3) Å, and a volume of 188.40(1) Å3. It was synthesized in a high-pressure/high-temperature experiment at 7 GPa and 1673 K and represents the first high-pressure oxonitridoborate. It is built up of starlike-shaped entities of four BO3N tetrahedra, connected via one common nitrogen atom that resembles the fourfold-coordinated nitrogen atoms in the homeotypic nitridosilicates MYbSi4N7 (M=Sr, Ba). Building up a network with channels that contain the Cr3+ ions, CrB4O6N contains for the first time a tetrahedral building unit in contrast to trigonal planar B(O/N)3 entities in all other known oxonitridoborates. The structural relations as well as the results of spectroscopic measurements and calculations on the chromium oxonitridoborate are discussed.
Author:Birgit Fuchs, Dirk Johrendt, Lkhamsuren BayarjargalORCiDGND, Hubert Huppertz
Parent Title (German):Angewandte Chemie
Place of publication:Weinheim
Document Type:Article
Date of Publication (online):2021/08/11
Date of first Publication:2021/08/11
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2022/03/09
Tag:crystal structure; electronic band structure; high-pressure chemistry; oxonitridoborate; vibrational spectroscopy
Page Number:6
First Page:21801
Last Page:21806
Institutes:Geowissenschaften / Geographie
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften
Licence (German):License LogoCreative Commons - Namensnennung-Nicht kommerziell - Keine Bearbeitung 4.0