Anisotropic thermal expansion behavior in tetragonal Sr2M9WO6

被引：19

作者：

Achary, SN ^{[1
]}

Chakraborty, KR ^{[1
]}

Patwe, SJ ^{[1
]}

Shinde, AB ^{[1
]}

Krishna, PSR ^{[1
]}

Tyagi, AK ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Solid State Phys Div, Appl Chem Div, Bombay 400085, Maharashtra, India

来源：

MATERIALS RESEARCH BULLETIN | 2006年 / 41卷 / 03期

关键词：

crystal structure;

D O I：

10.1016/j.materresbull.2005.07.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The colorless sample of Sr2MgWO6 was prepared by conventional solid-state reaction of stoichiometric amounts of SrCO3, WO3 and MgO and characterized by powder X-ray diffraction (XRD) studies. In the temperature range of 300-15 K, detailed structural studies on Sr2MgWO6 were carried out by Rietveld refinements of the observed powder neutron diffraction (ND) data. At ambient temperature Sr2MgWO6 crystallizes in tetragonal (space group I4/m) lattice with unit cell parameters: a = 5.5882(2) and c = 7.9452(7) angstrom, V = 248.11(3) angstrom(3), Z = 2. This tetragonal (I4/m) structure is retained down to 15 K. The structural analysis of the sample at different temperatures indicates no appreciable change in the Mg-O and W-O bond lengths. However, a decrease in the tilt angle is observed with increasing temperature. The negative thermal expansion of the c-axis is attributed to increasing transverse displacement amplitude of the bridging oxygen atoms along this axis. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：674 / 682

页数：9

共 26 条

[1] Formation of a cubic Sr2MnWO6 phase at elevated temperature;: a neutron powder diffraction study [J].

Azad, AK ;

Eriksson, SG .

SOLID STATE COMMUNICATIONS, 2003, 126 (09) :503-508

[2] Nuclear and magnetic structure of Ca2MnWO6:: A neutron powder diffraction study [J].

Azad, AK ;

Ivanov, SA ;

Eriksson, SG ;

Eriksen, J ;

Rundlöf, H ;

Mathieu, R ;

Svedlindh, P .

MATERIALS RESEARCH BULLETIN, 2001, 36 (13-14) :2485-2496

[3] Synthesis, crystal structure, and magnetic characterization of the double perovskite Ba2MnWO6 [J].

Azad, AK ;

Ivanov, SA ;

Eriksson, SG ;

Eriksen, J ;

Rundlöf, H ;

Mathieu, R ;

Svedlindh, P .

MATERIALS RESEARCH BULLETIN, 2001, 36 (12) :2215-2228

[4] Structural and magnetic properties of the double perovskite Sr2MnWO6 [J].

Azad, AK ;

Ivanov, S ;

Eriksson, SG ;

Rundlöf, H ;

Eriksen, J ;

Mathieu, R ;

Svedlindh, P .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2001, 237 (02) :124-134

[5] NEW COMPOUNDS WITH PEROVSKITE-LIKE STRUCTURES [J].

BLASSE, G .

JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1965, 27 (05) :993-&

[6] Structural phase transition and the electronic and magnetic properties of Sr2FeMoO6 [J].

Chmaissem, O ;

Kruk, R ;

Dabrowski, B ;

Brown, DE ;

Xiong, X ;

Kolesnik, S ;

Jorgensen, JD ;

Kimball, CW .

PHYSICAL REVIEW B, 2000, 62 (21) :14197-14206

[7]

FU ZM, 1995, SCI CHINA SER A, V38, P974

[8]

Galasso F., 1969, Structure, properties and preparation of perovskite type compounds

[9] Crystal structures and phase transitions of the double-perovskite oxides Sr2CaWO6 and Sr2MgWO6 [J].

Gateshki, M ;

Igartua, JM .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (37) :6639-6649

[10] X-ray powder diffraction results for the phase transitions in Sr2MWO6 (M = Ni, Zn, Co, Cu) double perovskite oxides [J].

Gateshki, M ;

Igartua, JM ;

Hernández-Bocanegra, E .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (36) :6199-6217

← 1 2 3 →