In:
Zeitschrift für anorganische und allgemeine Chemie, Wiley, Vol. 633, No. 9 ( 2007-08), p. 1359-1365
Abstract:
Two new layered rare earth boride halides, La 2 XB 3 (X = Cl, Br) have been synthesized. They crystallize in the space group (No. 174) with a = 7.872(1) Å, c = 8.219(2) Å, V = 441.1(1) Å 3 for the chloride, and with a = 7.834(1) Å, c = 8.440(1) Å, V = 448.6(1) Å 3 for the bromide compound, respectively. The crystals of La 2 ClB 3 are twinned resulting in an apparent symmetry P 6/ mmm (No. 191). In the crystal structure of La 2 XB 3 , trigonal La 6 prisms are condensed into sheets in the a‐b plane, and the halogen atoms X sandwich the La double layers. The connection of B atoms which center the prisms and rectangular prism faces leads to B nets of B 3 , B 6 and B 8 rings embedded between the La atom double layers. The chemical bonding is analyzed for the well ordered bromide, and the characteristic disorder in the chloride is discussed.
Type of Medium:
Online Resource
ISSN:
0044-2313
,
1521-3749
DOI:
10.1002/zaac.200700040
Language:
English
Publisher:
Wiley
Publication Date:
2007
detail.hit.zdb_id:
201094-X
detail.hit.zdb_id:
1481139-X
Permalink