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Possible Superhardness of CrB4

Knappschneider, Arno ; Litterscheid, Christian ; Dzivenko, Dmytro ; Kurzman, Joshua A. ; Seshadri, Ram ; Wagner, Norbert ; Beck, Johannes ; Riedel, Ralf ; Albert, Barbara (2013):
Possible Superhardness of CrB4.
In: Inorganic Chemistry, 52 (2), pp. 540-542. ACS Publications, ISSN 0020-1669,
[Article]

Abstract

Chromium tetraboride [orthorhombic, space group Pnnm (No. 58), a = 474.65(9) pm, b = 548.0(1) pm, c = 286.81(5) pm, and R value (all data) = 0.041], formerly described in space group Immm, was found not to be superhard, despite several theory-based prognoses. CrB4 shows an almost temperature-independent paramagnetism, consistent with low-spin CrI in a metallic compound. Conductivity measurements confirm the metallic character.

Item Type: Article
Erschienen: 2013
Creators: Knappschneider, Arno ; Litterscheid, Christian ; Dzivenko, Dmytro ; Kurzman, Joshua A. ; Seshadri, Ram ; Wagner, Norbert ; Beck, Johannes ; Riedel, Ralf ; Albert, Barbara
Title: Possible Superhardness of CrB4
Language: English
Abstract:

Chromium tetraboride [orthorhombic, space group Pnnm (No. 58), a = 474.65(9) pm, b = 548.0(1) pm, c = 286.81(5) pm, and R value (all data) = 0.041], formerly described in space group Immm, was found not to be superhard, despite several theory-based prognoses. CrB4 shows an almost temperature-independent paramagnetism, consistent with low-spin CrI in a metallic compound. Conductivity measurements confirm the metallic character.

Journal or Publication Title: Inorganic Chemistry
Journal volume: 52
Number: 2
Publisher: ACS Publications
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
07 Department of Chemistry
07 Department of Chemistry > Fachgebiet Anorganische Chemie
07 Department of Chemistry > Physical Chemistry
Date Deposited: 13 Jan 2014 12:55
Official URL: http://dx.doi.org/10.1021/ic3020404
Identification Number: doi:10.1021/ic3020404
Funders: This work made use of the shared experimental facilities of the Materials Research Laboratory supported by the National Science Foundation through the MRSEC Program (NSF DMR-1121053). , J.A.K. thanks the ConvEne-IGERT Program (NSF-DGE 0801627) for an Associateship, B.A. gratefully acknowledges financial support from the Alexander von Humboldt Foundation and the German Academic Exchange Service.
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