In:
Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 60, No. 5 ( 2005-5-1), p. 499-504
Abstract:
A new rare earth carbide boride halide, La 3 Cl 3 BC, has been prepared by heating a mixture of stoichiometric quantities of LaCl 3 , La, B and C at 1050 °C for 10 days. La 3 Cl 3 BC (La 3 Br 3 BC type) crystallizes in the monoclinic system with space group P2 1 /m (No. 11), a = 8.2040(16), b = 3.8824(8), c=11.328(2)Å , β =100.82(3)°. In the structure, monocapped trigonal prisms containing B-C units are condensed into chains along the b direction, and the chains are further linked by Cl atoms in the a and c directions. The condensation results in a polymeric anion 1 ∞ [BC] with a spine of B atoms in a trigonal prismatic coordination by La, and the C atoms attached in a square pyramidal coordination. The B-B and B-C distances are 2.16 and 1.63 Å , respectively. La 3 Cl 3 BC is metallic. The EH calculation shows that the distribution of valence electrons can be formulated as (La 3+ ) 3 (Cl − ) 3 (BC) 5− · e − .
Type of Medium:
Online Resource
ISSN:
1865-7117
,
0932-0776
DOI:
10.1515/znb-2005-0504
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2005
detail.hit.zdb_id:
2078109-X
detail.hit.zdb_id:
124635-5
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