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In situ synchrotron diffraction of pressure-induced phase transition in DyPO 4 under variable hydrostaticity

Journal Article · · Physical Review B
In situ synchrotron x-ray diffraction was conducted on polycrystalline DyPO4 to elucidate the details of the pressure-induced transition from the xenotime polymorph to the monazite polymorph. We used three different pressure-transmitting media (neon, a 16:3:1 methanol-ethanol-water mixture, and potassium chloride) to investigate the effect of hydrostaticity on the phase behavior. Specifically, our data clearly show a hydrostatic onset pressure of the xenotime-monazite transition of 9.1 GPa, considerably lower than the 15.3 GPa previously determined by Raman spectroscopy. Based on (quasi)hydrostatic data taken in a neon environment, third-order Birch-Murnaghan equation-of-state fits give a xenotime bulk modulus of 144 GPa and a monazite bulk modulus of 180 GPa (both with pressure derivatives of 4.0). Structural data and axial compressibilities show that DyPO4 is sensitive to shear and has an anisotropic response to pressure. More highly deviatoric conditions cause the onset of the transition to shift to pressures at least as low as 7.0 GPa. We attribute early transition to shear-induced distortion of the PO4 tetrahedra. Finally, our characterization of the high-pressure behavior of DyPO4 under variable hydrostaticity is critical for advancing rare earth orthophosphate fiber coating applications in ceramic matrix composites and may inform future tailoring of phase composition for controlled shear and pressure applications.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1784129
Alternate ID(s):
OSTI ID: 1783898
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 18 Vol. 103; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (38)

Performance of DFT+ U method for prediction of structural and thermodynamic parameters of monazite-type ceramics journal April 2014
The structures of three lanthanide orthophosphates journal January 1983
Phase transformations in xenotime rare-earth orthophosphates journal October 2013
Relationship between the thermodynamic excess properties of mixing and the elastic moduli in the monazite-type ceramics journal July 2016
Pressure-induced zircon-type to scheelite-type phase transitions in YbPO4 and LuPO4 journal October 2008
The structural response of gadolinium phosphate to pressure journal September 2016
Structural characterisation of metastable Tb- and Dy-monazites journal May 2019
Pressure-induced transition in titanium metal a systematic study of the effects of uniaxial stress journal January 2005
The HighScore suite journal October 2014
Bonding Characteristics, Thermal Expansibility, and Compressibility of RXO 4 (R = Rare Earths, X = P, As) within Monazite and Zircon Structures journal May 2009
Calibration of the ruby pressure gauge to 800 kbar under quasi-hydrostatic conditions journal January 1986
The Effect of Pressure Upon the Elastic Parameters of Isotropic Solids, According to Murnaghan's Theory of Finite Strain journal April 1938
The laser micro-machining system for diamond anvil cell experiments and general precision machining applications at the High Pressure Collaborative Access Team journal July 2015
Online remote control systems for static and dynamic compression and decompression using diamond anvil cells journal July 2015
Structure and compression of crystalline argon and neon at high pressure and room temperature journal December 1981
The COMPRES/GSECARS gas-loading system for diamond anvil cells at the Advanced Photon Source journal September 2008
DIOPTAS : a program for reduction of two-dimensional X-ray diffraction data and data exploration journal May 2015
Structural properties of NaCl and KCl under pressure journal May 1986
Hydrostatic limits of 11 pressure transmitting media journal March 2009
Raman study of tetragonal TbPO 4 and observation of a first-order phase transition at high pressure journal September 2008
High-pressure structural, elastic, and thermodynamic properties of zircon-type HoPO 4 and TmPO 4 journal January 2017
Raman study of zircon-structured RPO 4 (R = Y, Tb, Er, Tm) phosphates at high pressures journal July 2008
X-ray diffraction and equation of state of solid neon to 110 GPa journal June 1989
Equations of state of six metals above 94 GPa journal September 2004
High-pressure phase transitions of ScPO 4 and YPO 4 journal November 2009
High-pressure stability and compressibility ofAPO4 (A=La, Nd, Eu, Gd, Er, and Y) orthophosphates: An x-ray diffraction study using synchrotron radiation journal February 2010
Theoretical and experimental study of the structural stability of TbPO4 at high pressures journal April 2010
High-pressure study of the behavior of mineral barite by x-ray diffraction journal August 2011
Effects of pressure on the structure and lattice dynamics of TmPO 4 : Experiments and calculations journal January 2012
High-pressure–high-temperature equation of state of KCl and KBr journal June 2012
Crystal data for lanthanide orthophosphates journal October 1976
EosFit7-GUI : a new graphical user interface for equation of state calculations, analyses and teaching journal June 2016
Thermal Reactions of Hydrated Hexagonal RPO4.nH2O (R=Tb or Dy, n=0.5 to 1) journal July 1988
Transformation Plasticity in (Gd x Dy 1− x )PO 4 Fiber Coatings During Fiber Push Out journal April 2013
In situ Raman spectroscopy of pressure‐induced phase transformations in polycrystalline Tb PO 4 , Dy PO 4 , and Gd x Dy (1− x ) PO 4 journal January 2018
Whole powder pattern decomposition methods and applications: A retrospection journal December 2005
Thermochemistry of rare-earth orthophosphates journal September 2001
Synthesis, Structure, and Properties of Monazite, Pretulite, and Xenotime journal January 2002

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