Chloride influence on the formation of lanthanum hexaboride: An in-situ diffraction study

Mattox, Tracy M.; Groome, Chloe; Doran, Andrew; Beavers, Christine M.; Urban, Jeffrey J.

doi:10.1016/j.jcrysgro.2018.01.013

Title: Chloride influence on the formation of lanthanum hexaboride: An in-situ diffraction study

Journal Article · Thu Mar 01 00:00:00 EST 2018 · Journal of Crystal Growth

DOI:https://doi.org/10.1016/j.jcrysgro.2018.01.013· OSTI ID:1630948

Mattox, Tracy M.; Groome, Chloe; Doran, Andrew; Beavers, Christine M.; Urban, Jeffrey J.

LaB₆ has been a material of interest for decades due to its thermionic emission, plasmonic properties, and low work function, and researchers continue to discover new properties even now. In order to meet growing interest in customizing these properties, it is important to gain better control over the system and a better understanding of the fundamental mechanism of LaB₆ crystal growth and formation. Traditional synthetic methods require very high temperatures, at which point crystallization happens too quickly to be readily studied. Our discovery that LaB₆ may be made using lower temperatures has made it possible to slow down crystal formation enough for lattice growth to be observed. Here, we report an in situ diffraction study of the reaction between LaCl₃ and NaBH₄ . In observing the evolution of the (1 1 1), (1 1 0), and (2 0 0) lattice planes of LaB₆, we have discovered that the Cl of LaCl3 has a strong influence on crystal formation, and that excess Cl, temperature and heating rate may all be used as tools to control the LaB₆ final product.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Office of Workforce Development for Teachers & Scientists (WDTS); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1630948

Alternate ID(s):: OSTI ID: 1434032

Journal Information:: Journal of Crystal Growth, Journal Name: Journal of Crystal Growth Vol. 486 Journal Issue: C; ISSN 0022-0248

Publisher:: ElsevierCopyright Statement

Country of Publication:: Netherlands

Language:: English

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Cited by: 6 works

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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A1. X-ray diffraction
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Title: Chloride influence on the formation of lanthanum hexaboride: An in-situ diffraction study

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