Phase transition in weberite-type Gd3NbO7

Lu Cai, Sava Denev, Venkatraman Gopalan, Juan C. Nino

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Gd3NbO7 has an orthorhombic weberite-type crystal structure and undergoes a phase transition at about 340 K. The phase transition was confirmed by second harmonic generation, heat capacity measurement, and high-resolution X-ray diffraction. Above 340 K, Gd3NbO7 has a centrosymmetric weberite-type structure with space group Cmcm (No. 63) and transforms at about 340 K into a non-centrosymmetric structure with space group Cm2m (No. 38). The phase transition is mainly due to off-center shifts of Nb5+ ions within NbO6 octahedra, as well as off-center shifts of one-third of the Gd3+ ions within GdO8 polyhedra.

Original languageEnglish (US)
Pages (from-to)875-880
Number of pages6
JournalJournal of the American Ceramic Society
Volume93
Issue number3
DOIs
StatePublished - Mar 1 2010

Fingerprint

Phase transitions
Ions
Harmonic generation
Specific heat
Crystal structure
X ray diffraction

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Cai, Lu ; Denev, Sava ; Gopalan, Venkatraman ; Nino, Juan C. / Phase transition in weberite-type Gd3NbO7. In: Journal of the American Ceramic Society. 2010 ; Vol. 93, No. 3. pp. 875-880.
@article{e9adb0fca6b043399f804813e2c280f1,
title = "Phase transition in weberite-type Gd3NbO7",
abstract = "Gd3NbO7 has an orthorhombic weberite-type crystal structure and undergoes a phase transition at about 340 K. The phase transition was confirmed by second harmonic generation, heat capacity measurement, and high-resolution X-ray diffraction. Above 340 K, Gd3NbO7 has a centrosymmetric weberite-type structure with space group Cmcm (No. 63) and transforms at about 340 K into a non-centrosymmetric structure with space group Cm2m (No. 38). The phase transition is mainly due to off-center shifts of Nb5+ ions within NbO6 octahedra, as well as off-center shifts of one-third of the Gd3+ ions within GdO8 polyhedra.",
author = "Lu Cai and Sava Denev and Venkatraman Gopalan and Nino, {Juan C.}",
year = "2010",
month = "3",
day = "1",
doi = "10.1111/j.1551-2916.2009.03494.x",
language = "English (US)",
volume = "93",
pages = "875--880",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "3",

}

Phase transition in weberite-type Gd3NbO7. / Cai, Lu; Denev, Sava; Gopalan, Venkatraman; Nino, Juan C.

In: Journal of the American Ceramic Society, Vol. 93, No. 3, 01.03.2010, p. 875-880.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Phase transition in weberite-type Gd3NbO7

AU - Cai, Lu

AU - Denev, Sava

AU - Gopalan, Venkatraman

AU - Nino, Juan C.

PY - 2010/3/1

Y1 - 2010/3/1

N2 - Gd3NbO7 has an orthorhombic weberite-type crystal structure and undergoes a phase transition at about 340 K. The phase transition was confirmed by second harmonic generation, heat capacity measurement, and high-resolution X-ray diffraction. Above 340 K, Gd3NbO7 has a centrosymmetric weberite-type structure with space group Cmcm (No. 63) and transforms at about 340 K into a non-centrosymmetric structure with space group Cm2m (No. 38). The phase transition is mainly due to off-center shifts of Nb5+ ions within NbO6 octahedra, as well as off-center shifts of one-third of the Gd3+ ions within GdO8 polyhedra.

AB - Gd3NbO7 has an orthorhombic weberite-type crystal structure and undergoes a phase transition at about 340 K. The phase transition was confirmed by second harmonic generation, heat capacity measurement, and high-resolution X-ray diffraction. Above 340 K, Gd3NbO7 has a centrosymmetric weberite-type structure with space group Cmcm (No. 63) and transforms at about 340 K into a non-centrosymmetric structure with space group Cm2m (No. 38). The phase transition is mainly due to off-center shifts of Nb5+ ions within NbO6 octahedra, as well as off-center shifts of one-third of the Gd3+ ions within GdO8 polyhedra.

UR - http://www.scopus.com/inward/record.url?scp=77649198075&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77649198075&partnerID=8YFLogxK

U2 - 10.1111/j.1551-2916.2009.03494.x

DO - 10.1111/j.1551-2916.2009.03494.x

M3 - Article

VL - 93

SP - 875

EP - 880

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

IS - 3

ER -