Pressure‐induced phase transition and dissociation of PbMoO4. Issue 10 (2nd July 2015)

• Record Type: Journal Article
• Authors: Huang, Shengxuan; Lai, Xiaojing; Zhu, Feng; Wu, Xiang; Yang, Ke; Qin, Shan
• Is Part Of: Physica status solidi. Volume 252:Issue 10(2015:Oct.)
• Page Start: 2215
• Page End: 2221
• Publication Date: 2015-07-02
• Subjects: Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201552077
• Languages: English
• ISSNs: 0370-1972

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pssb201552077-sec-0001" sec-type="section"> <p>The high‐pressure behavior of PbMoO₄ has been studied by <italic>in situ</italic> synchrotron radiation X‐ray diffraction (XRD) combined with a diamond anvil cell (DAC) up to ∼38 GPa. At room temperature, phase transitions of PbMoO₄ from the scheelite structure to the wolframite structure and then to amorphization are detected at ∼8.3 and ∼35 GPa, respectively. Pressure–volume relationships of PbMoO₄ are described by the Birch–Murnaghan equation of state, giving <italic>V</italic>₀ = 355.8(3) ų, <italic>K</italic>₀ = 73(4) GPa, <italic>K</italic>₀′ = 5(1) (third order) for the scheelite‐structured phase and <italic>V</italic>₀ = 166(1) ų, <italic>K</italic>₀ = 85(4) GPa, <italic>K</italic>₀′ = 4 (fixed) (second order) for the wolframite‐structured phase. When PbMoO₄ undergoes the high‐temperature annealing treatment at ∼17.5 GPa, it will dissociate into assembly of the PbO (<italic>Pbcm</italic> and <italic>Z</italic> = 4) and PbMo₂O₇ (<italic>P</italic>2₁/<italic>c</italic> and <italic>Z </italic>= 4).</p> </sec> </abstract>