Eine neue Modifikation von Lanthanmonogermanid – lT-LaGe; A new modification of 
lanthanummonogermanide - IT-LaGe

Mattausch, Hj.; Simon, A.

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Eine neue Modifikation von Lanthanmonogermanid – lT-LaGe; A new modification of lanthanummonogermanide - IT-LaGe

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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;

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

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Citation

Mattausch, H., & Simon, A. (2004). Eine neue Modifikation von Lanthanmonogermanid – lT-LaGe; A new modification of lanthanummonogermanide - IT-LaGe. Zeitschrift für Naturforschung B, 59(5), 559-561.

Cite as: https://hdl.handle.net/21.11116/0000-000E-FF2D-2

Abstract

Single crystals of the low temperature modification of LaGe are
obtained as a byproduct in the reaction of La metal, LaBr3 and Ge
powder at 1000 degreesC as silver colored, moisture sensitive needles.
1T-LaGe crystallizes in space group Cmcm with a = 4.5590(10), b =
13.766(2), c = 6.745(2) Angstrom(.) The Ge atoms form
cis-trans-cis-trans-chains with d(Ge-Ge) = 2.621 (1) and 2.799(1)
Angstrom in contrast to Ge zigzag chains found in the high temperature
modification of LaGe crystallizing in the FeB structure type. In both
structures the Ge atoms are surrounded by trigonal prisms of lanthanum
atoms with CN = 6 + 1 but different connection of the prisms.