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The Structure of Twinned Ag 4 Mn 3 O 8 , a Novel Octahedral Framework with a Topology Related to the Archetype Cubic {10, 3} Net
Author(s) -
Ahlert S.,
Friese K.,
Jansen M.
Publication year - 2002
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/1521-3749(200207)628:7<1525::aid-zaac1525>3.0.co;2-#
Subject(s) - octahedron , archetype , crystallography , net (polyhedron) , topology (electrical circuits) , materials science , crystal twinning , crystal structure , combinatorics , microstructure , chemistry , geometry , mathematics , art , literature
Preparative exploration of the system Ag—Mn—O under an elevated oxygen pressure yielded so far unknown Ag 4 Mn 3 O 8 . Single crystal X‐ray investigations have revealed a trigonal crystal system, space group P 3 1 21 with lattice parameters a = 12.5919(1) and c = 15.4978(1)Å. Due to fourfold twinning a large cubic unit cell with a ≈ 26Å is simulated. The structure, which was refined as a fourfold twin, is composed of MnO 6 octahedra which are connected via common edges to a complex framework. The topology of this framework is closely related to the archetype cubic {10, 3} net. In the cavities of the framework the Ag + ions are incorporated.