Possible Superhardness of CrB4

被引：77
|
作者：
Knappschneider, Arno [1 ]
Litterscheid, Christian [1 ]
Dzivenko, Dmytro [2 ]
Kurzman, Joshua A. [3 ,4 ]
Seshadri, Ram [3 ,4 ]
Wagner, Norbert [5 ]
Beck, Johannes [5 ]
Riedel, Ralf [2 ]
Albert, Barbara [1 ]
机构：
[1] Tech Univ Darmstadt, Eduard Zintl Inst Inorgan & Phys Chem, D-64287 Darmstadt, Germany
[2] Tech Univ Darmstadt, FB Mat & Geowissensch, D-64287 Darmstadt, Germany
[3] Univ Calif Santa Barbara, Dept Chem & Biochem, Dept Mat, Santa Barbara, CA 93106 USA
[4] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA
[5] Univ Bonn, Inst Inorgan Chem, D-53121 Bonn, Germany
来源：
INORGANIC CHEMISTRY | 2013年 / 52卷 / 02期
基金：
美国国家科学基金会;
关键词：
CRYSTAL-STRUCTURE; BORIDE; MNB4;
D O I：
10.1021/ic3020404
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
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 Cr-I in a metallic compound. Conductivity measurements confirm the metallic character.
引用
收藏
页码：540 / 542
页数：3
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