Published February 2, 2005 | Version v1
Journal article Metadata-only

Pressure-induced tricritical phase transition from the scheelite structure to the fergusonite structure in LiLuF4

Creators

  • 1. Departamento de FIsica de la Materia Condensada, Universidad del PaIs Vasco, Apartado 644, Bilbao, E-48080 (Spain)
  • 2. Group 'Structure of Materials under Extreme Conditions', Swiss-Norwegian Beamlines, European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble cedex (France)
  • 3. Universite du Maine-Cristallogenese, F-72025 Le Mans cedex (France)
  • 4. European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble cedex (France)

Description

LiLuF4 scheelite (I41/a, Z = 4) has been investigated at high pressures using synchrotron angle-dispersive x-ray powder diffraction in a diamond anvil cell at room temperature. At 10.7 GPa, it reversibly undergoes a tricritical phase transition to the fergusonite structure (C 12/c 1, Z = 4), a distorted modification of the scheelite type. No other phase transition occurs in this material up to 19.5 GPa, the highest pressure in this study. Such a high-pressure behaviour is compared with the pressure-induced transformations in LiYF4 and LiGdF4, adding on to our knowledge of the structural systematics in LiMF4 compounds

Availability note (English)

Available online at http://stacks.iop.org/0953-8984/17/763/cm5_4_018.pdf or at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-648X) http://www.iop.org/

Additional details

Identifiers

URL
http://stacks.iop.org/0953-8984/17/763/cm5_4_018.pdf; http://www.iop.org/;
DOI
10.1088/0953-8984/17/4/018;
PII
S0953-8984(05)88107-X;

Publishing Information

Journal Title
Journal of Physics. Condensed Matter
Journal Volume
17
Journal Issue
4
Journal Page Range
p. 763-770
ISSN
0953-8984
CODEN
JCOMEL

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36035494
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
DIAMONDS; LITHIUM COMPOUNDS; LUTETIUM FLUORIDES; PHASE TRANSFORMATIONS; PRESSURE DEPENDENCE; PRESSURE RANGE GIGA PA; TEMPERATURE RANGE 0273-0400 K; TETRAGONAL LATTICES; X-RAY DIFFRACTION
Descriptors DEC
ALKALI METAL COMPOUNDS; CARBON; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIFFRACTION; ELEMENTS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; LUTETIUM COMPOUNDS; MINERALS; NONMETALS; PRESSURE RANGE; RARE EARTH COMPOUNDS; SCATTERING; TEMPERATURE RANGE