Crystal structure and compressibility of lead dioxide up to 140 GPa

Brent Grocholski, Sang-Heon Shim, Elizabeth Cottrell, Vitali B. Prakapenka

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Lead dioxide is an important silica analog that has high-pressure behavior similar to what has been predicted for silica, only at lower pressures. We have measured the structural evolution and compressional behavior of different lead dioxide polymorphs up to 140 GPa in the laser-heated diamond-anvil cell using argon as a pressure medium. High-temperature heating prevents the formation of multi-phase mixtures found in a previous study conducted at room temperature using a silicone grease pressure medium. We find diffraction peaks consistent with a baddeleyite-type phase in our cold-compressed samples between 30 and 40 GPa, which was not observed in the previous measurements. Lead dioxide undergoes a phase transition to a cotunnite-type phase at 24 GPa. This phase remains stable to at least 140 GPa with a bulk modulus of 219(3) GPa for K′0 = 4. Decompression measurements show a pure cotunnite-type phase until 10.5 GPa, where the sample converts to a mixture of baddeleyite-type, pyrite-type, and OI-type (Pbca) phases. Pure α-structured lead dioxide (scrutinyite) is found after pressure release at room pressure even though our starting material was in the β-structure (plattnerite). Pressure quenching to the α-structure appears to be a common feature of all group IVa oxides that are compressed to structures with greater density than the rutile-type structure.

Original languageEnglish (US)
Pages (from-to)170-177
Number of pages8
JournalAmerican Mineralogist
Volume99
Issue number1
DOIs
StatePublished - Jan 2014

Fingerprint

compressibility
dioxides
Compressibility
crystal structure
Crystal structure
baddeleyite
oxide group
silica
Silicon Dioxide
diamond anvil cell
bulk modulus
silicon dioxide
decompression
greases
rutile
argon
phase transition
diffraction
pressure reduction
low pressure

Keywords

  • Equation of state
  • High pressure
  • Lead dioxide
  • Phase diagram

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Crystal structure and compressibility of lead dioxide up to 140 GPa. / Grocholski, Brent; Shim, Sang-Heon; Cottrell, Elizabeth; Prakapenka, Vitali B.

In: American Mineralogist, Vol. 99, No. 1, 01.2014, p. 170-177.

Research output: Contribution to journalArticle

Grocholski, Brent ; Shim, Sang-Heon ; Cottrell, Elizabeth ; Prakapenka, Vitali B. / Crystal structure and compressibility of lead dioxide up to 140 GPa. In: American Mineralogist. 2014 ; Vol. 99, No. 1. pp. 170-177.
@article{b49101fb6f2a4f32abef37c98c8b3f42,
title = "Crystal structure and compressibility of lead dioxide up to 140 GPa",
abstract = "Lead dioxide is an important silica analog that has high-pressure behavior similar to what has been predicted for silica, only at lower pressures. We have measured the structural evolution and compressional behavior of different lead dioxide polymorphs up to 140 GPa in the laser-heated diamond-anvil cell using argon as a pressure medium. High-temperature heating prevents the formation of multi-phase mixtures found in a previous study conducted at room temperature using a silicone grease pressure medium. We find diffraction peaks consistent with a baddeleyite-type phase in our cold-compressed samples between 30 and 40 GPa, which was not observed in the previous measurements. Lead dioxide undergoes a phase transition to a cotunnite-type phase at 24 GPa. This phase remains stable to at least 140 GPa with a bulk modulus of 219(3) GPa for K′0 = 4. Decompression measurements show a pure cotunnite-type phase until 10.5 GPa, where the sample converts to a mixture of baddeleyite-type, pyrite-type, and OI-type (Pbca) phases. Pure α-structured lead dioxide (scrutinyite) is found after pressure release at room pressure even though our starting material was in the β-structure (plattnerite). Pressure quenching to the α-structure appears to be a common feature of all group IVa oxides that are compressed to structures with greater density than the rutile-type structure.",
keywords = "Equation of state, High pressure, Lead dioxide, Phase diagram",
author = "Brent Grocholski and Sang-Heon Shim and Elizabeth Cottrell and Prakapenka, {Vitali B.}",
year = "2014",
month = "1",
doi = "10.2138/am.2014.4596",
language = "English (US)",
volume = "99",
pages = "170--177",
journal = "American Mineralogist",
issn = "0003-004X",
publisher = "Mineralogical Society of America",
number = "1",

}

TY - JOUR

T1 - Crystal structure and compressibility of lead dioxide up to 140 GPa

AU - Grocholski, Brent

AU - Shim, Sang-Heon

AU - Cottrell, Elizabeth

AU - Prakapenka, Vitali B.

PY - 2014/1

Y1 - 2014/1

N2 - Lead dioxide is an important silica analog that has high-pressure behavior similar to what has been predicted for silica, only at lower pressures. We have measured the structural evolution and compressional behavior of different lead dioxide polymorphs up to 140 GPa in the laser-heated diamond-anvil cell using argon as a pressure medium. High-temperature heating prevents the formation of multi-phase mixtures found in a previous study conducted at room temperature using a silicone grease pressure medium. We find diffraction peaks consistent with a baddeleyite-type phase in our cold-compressed samples between 30 and 40 GPa, which was not observed in the previous measurements. Lead dioxide undergoes a phase transition to a cotunnite-type phase at 24 GPa. This phase remains stable to at least 140 GPa with a bulk modulus of 219(3) GPa for K′0 = 4. Decompression measurements show a pure cotunnite-type phase until 10.5 GPa, where the sample converts to a mixture of baddeleyite-type, pyrite-type, and OI-type (Pbca) phases. Pure α-structured lead dioxide (scrutinyite) is found after pressure release at room pressure even though our starting material was in the β-structure (plattnerite). Pressure quenching to the α-structure appears to be a common feature of all group IVa oxides that are compressed to structures with greater density than the rutile-type structure.

AB - Lead dioxide is an important silica analog that has high-pressure behavior similar to what has been predicted for silica, only at lower pressures. We have measured the structural evolution and compressional behavior of different lead dioxide polymorphs up to 140 GPa in the laser-heated diamond-anvil cell using argon as a pressure medium. High-temperature heating prevents the formation of multi-phase mixtures found in a previous study conducted at room temperature using a silicone grease pressure medium. We find diffraction peaks consistent with a baddeleyite-type phase in our cold-compressed samples between 30 and 40 GPa, which was not observed in the previous measurements. Lead dioxide undergoes a phase transition to a cotunnite-type phase at 24 GPa. This phase remains stable to at least 140 GPa with a bulk modulus of 219(3) GPa for K′0 = 4. Decompression measurements show a pure cotunnite-type phase until 10.5 GPa, where the sample converts to a mixture of baddeleyite-type, pyrite-type, and OI-type (Pbca) phases. Pure α-structured lead dioxide (scrutinyite) is found after pressure release at room pressure even though our starting material was in the β-structure (plattnerite). Pressure quenching to the α-structure appears to be a common feature of all group IVa oxides that are compressed to structures with greater density than the rutile-type structure.

KW - Equation of state

KW - High pressure

KW - Lead dioxide

KW - Phase diagram

UR - http://www.scopus.com/inward/record.url?scp=84892168321&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84892168321&partnerID=8YFLogxK

U2 - 10.2138/am.2014.4596

DO - 10.2138/am.2014.4596

M3 - Article

AN - SCOPUS:84892168321

VL - 99

SP - 170

EP - 177

JO - American Mineralogist

JF - American Mineralogist

SN - 0003-004X

IS - 1

ER -