TY  - JOUR
A1  - Fuchs, Birgit
A1  - Johrendt, Dirk
A1  - Bayarjargal, Lkhamsuren
A1  - Huppertz, Hubert
T1  - The first high-pressure chromium oxonitridoborate CrB4O6N - an unexpected link to nitridosilicate chemistry
T2  - Angewandte Chemie
N2  - 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.
KW  - crystal structure
KW  - electronic band structure
KW  - high-pressure chemistry
KW  - oxonitridoborate
KW  - vibrational spectroscopy
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/63904
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-639047
SN  - 1521-3773
VL  - 60
IS  - 40
SP  - 21801
EP  - 21806
PB  - Wiley-VCH
CY  - Weinheim
ER  -