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

页码：540 / 542

页数：3