Hsichengia: A 4,6-connected trigonal structural pattern in space group P3m1

A novel 4,6-connected network, called Hsichengia, is described. The novel network lies in the trigonal space group P3m1 (no. 156), with a = b = 3.447 A and c = 12.948 A; these lattice parameters were derived assuming Fe-S composition. It implies a binary AB2 stoichiometry in which the 6-connected A...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Bucknum, Michael J., Castro, Eduardo Alberto
Formato: Articulo
Lenguaje:Inglés
Publicado: 2009
Materias:
Química
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/139035
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-139035
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
spellingShingle Química
Bucknum, Michael J.
Castro, Eduardo Alberto
Hsichengia: A 4,6-connected trigonal structural pattern in space group P3m1
topic_facet Química
description A novel 4,6-connected network, called Hsichengia, is described. The novel network lies in the trigonal space group P3m1 (no. 156), with a = b = 3.447 A and c = 12.948 A; these lattice parameters were derived assuming Fe-S composition. It implies a binary AB2 stoichiometry in which the 6-connected A (Fe) atoms have octahedral configuration, and the 4-connected B (S) atoms have tetrahedral configuration. The Hsichengia network seems to be very closely related to the layered MoS2 structure-type, in which puckered MoS2 layers composed of octahedral Mo centers and trigonal-pyramidal S centers are held together by weak van der Waals forces normal to the a and b directions where the MoS2 layers extend. Thus the Hsichengia network can be generated from the MoS2 lattice by the formation of disulfide (S-S) bridges between particular layers, thereby creating a 3-dimensional network from a 2-dimensional layered structure, so that the S atoms are transformed from 3-connected trigonal-pyramidal coordination into fully 4-connected tetrahedral coordination. The Wells point symbol for the Hsichengia network is given by (4666)(4363)2, and it is thus seen to have the translated Schlafli symbol given as (5, 42/3). The latter is identical to that intrinsic to the well-known mineral structure of the pyrite network, FeS2, with the corresponding Wells point symbol (512)(56)2. Therefore, the Hsichengia network may be regarded as a topological isomer of the pyrite network, where topological isomerism is defined as occurring between unique networks possessing the same Schlafli symbol. Phase transformation between the two topological isomers is possible.
format Articulo
Articulo
author Bucknum, Michael J.
Castro, Eduardo Alberto
author_facet Bucknum, Michael J.
Castro, Eduardo Alberto
author_sort Bucknum, Michael J.
title Hsichengia: A 4,6-connected trigonal structural pattern in space group P3m1
title_short Hsichengia: A 4,6-connected trigonal structural pattern in space group P3m1
title_full Hsichengia: A 4,6-connected trigonal structural pattern in space group P3m1
title_fullStr Hsichengia: A 4,6-connected trigonal structural pattern in space group P3m1
title_full_unstemmed Hsichengia: A 4,6-connected trigonal structural pattern in space group P3m1
title_sort hsichengia: a 4,6-connected trigonal structural pattern in space group p3m1
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/139035
work_keys_str_mv AT bucknummichaelj hsichengiaa46connectedtrigonalstructuralpatterninspacegroupp3m1
AT castroeduardoalberto hsichengiaa46connectedtrigonalstructuralpatterninspacegroupp3m1
bdutipo_str Repositorios
_version_ 1764820456892792832

Ejemplares similares