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The compound La5Br4Al4 and the topological relation with the Ln3ClGa4 structure type

MPS-Authors
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Mattausch,  Hj.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Department Nanochemistry (Bettina V. Lotsch), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280353

Oeckler,  O.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Zheng,  C.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280526

Simon,  A.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Mattausch, H., Oeckler, O., Zheng, C., & Simon, A. (2004). The compound La5Br4Al4 and the topological relation with the Ln3ClGa4 structure type. Zeitschrift für anorganische und allgemeine Chemie, 630(5), 631-634.


Cite as: https://hdl.handle.net/21.11116/0000-000E-F6D1-0
Abstract
The compound La5Br4Al4 can be prepared from La metal, LaBr3 and Al
filings at 950 degreesC with a yield of 20%. It crystallizes
tetragonally in I4/mcm with a = b = 8.292(1) Angstrom, c = 20.122(4)
Angstrom. In the crystal structure 3 sheets of Br/La, La/Al, and La/Br
atoms, respectively, are stacked along [001] and are connected by
single layers of Br atoms. The Al atoms form undulated nets of
condensed Al-8 and Al-4 rings. The La atoms are arranged in tetragonal
antiprisms, centered by the second kind of crystallographically
different La atoms. These units are connected to sheets. In La3ClGa4
the identical 3 sheets formed by La, Ga, Cl atoms are present, however,
not separated by the additional layers of Br atoms as in La5Br4Al4.