Two New Arsenides, Eu7Cu44As23 and Sr7Cu44As23, With a New Filled Variety of the BaHg11 Structure

被引：14

作者：

Charkin, Dmitri O. ^{[1
]}

Demchyna, Roman ^{[2
,3
]}

Prots, Yurii ^{[3
]}

Borrmann, Horst ^{[3
]}

Burkhardt, Ulrich ^{[3
]}

Schwarz, Ulrich ^{[3
]}

Schnelle, Walter ^{[3
]}

Plokhikh, Igor V. ^{[1
]}

Kazakov, Sergey M. ^{[1
]}

Abakumov, Artem M. ^{[1
]}

Batuk, Dmitry ^{[4
]}

Verchenko, Valery Yu. ^{[1
,5
]}

Tsirlin, Alexander A. ^{[5
]}

Curfs, Caroline ^{[6
]}

Grin, Yuri ^{[3
]}

Shevelkov, Andrei V. ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow, Russia

[2] Natl Univ Forestry & Wood Technol Ukraine, Lvov, Ukraine

[3] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany

[4] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium

[5] NICPB, Tallinn, Estonia

[6] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

INORGANIC CHEMISTRY | 2014年 / 53卷 / 20期

基金：

俄罗斯基础研究基金会;

关键词：

CRYSTAL-STRUCTURE; CLATHRATE; VARIANT; TRANSPORT; FAMILY; GUEST; HEAT; SR; EU;

D O I：

10.1021/ic5017615

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two new ternary arsenides, namely, Eu7Cu44As23 and Sr7Cu44As23, were synthesized from elements at 800 degrees C. Their crystal structure represents a new filled version of the BaHg11 motif with cubic voids alternately occupied by Eu(Sr) and As atoms, resulting in a 2 x 2 x 2 superstructure of the aristotype: space group Fm (3) over barm, a = 16.6707(2) angstrom and 16.7467(2) angstrom, respectively. The Eu derivative exhibits ferromagnetic ordering below 17.5 K. In agreement with band structure calculations both compounds are metals, exhibiting relatively low thermopower, but high electrical and low thermal conductivity.

引用

页码：11173 / 11184

页数：12

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