Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
High-pressure synthesis of α-PbO2 and its crystal structure at 293, 203, and 113 K from single crystal diffraction data. / Filatov, Stanislav; Bendeliani, Nikolay; Albert, Barbara; Kopf, Jürgen; Dyuzeva, Tatiana; Lityagina, Ludmila.
в: Solid State Sciences, Том 7, № 11, 01.11.2005, стр. 1363-1368.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - High-pressure synthesis of α-PbO2 and its crystal structure at 293, 203, and 113 K from single crystal diffraction data
AU - Filatov, Stanislav
AU - Bendeliani, Nikolay
AU - Albert, Barbara
AU - Kopf, Jürgen
AU - Dyuzeva, Tatiana
AU - Lityagina, Ludmila
PY - 2005/11/1
Y1 - 2005/11/1
N2 - The synthesis and the first single crystal structure refinements of α-PbO2, a high-pressure modification of lead dioxide, at room and low temperatures are presented (RFsigma/RFuniq 0.025/0.048, 0.028/0.047, 0.027/0.044, wRFsigma/wRFuniq 0.056/0.061, 0.059/0.063, 0.059/0.062 at 293, 203, and 113 K, correspondingly). Single crystals were grown by a hydrothermal synthesis procedure (p=4.0 GPa, temperature range 600-300 °C, cooling rate 1.25°/min). α-PbO2 is orthorhombic, space group Pbcn (No. 60), Z=4, with a=4.9858(2) Å, b=5.9596(3) Å, c=5.4626(2) Å, V=162.31(1) Å3 for T=293 K. The description of the structure is given from a cation- and an anion-centered perspective. The oxygen atoms are coordinated by three lead atoms and oscillate mainly perpendicularly to the Pb 3-plane. The principal axes of the thermal displacement parameters decrease under cooling, and the anisotropy of the thermal oscillations increases from 293 to 113 K. Anisotropic thermal expansion was observed. Upon heating, the crystal structure extends practically only along the a-axis.
AB - The synthesis and the first single crystal structure refinements of α-PbO2, a high-pressure modification of lead dioxide, at room and low temperatures are presented (RFsigma/RFuniq 0.025/0.048, 0.028/0.047, 0.027/0.044, wRFsigma/wRFuniq 0.056/0.061, 0.059/0.063, 0.059/0.062 at 293, 203, and 113 K, correspondingly). Single crystals were grown by a hydrothermal synthesis procedure (p=4.0 GPa, temperature range 600-300 °C, cooling rate 1.25°/min). α-PbO2 is orthorhombic, space group Pbcn (No. 60), Z=4, with a=4.9858(2) Å, b=5.9596(3) Å, c=5.4626(2) Å, V=162.31(1) Å3 for T=293 K. The description of the structure is given from a cation- and an anion-centered perspective. The oxygen atoms are coordinated by three lead atoms and oscillate mainly perpendicularly to the Pb 3-plane. The principal axes of the thermal displacement parameters decrease under cooling, and the anisotropy of the thermal oscillations increases from 293 to 113 K. Anisotropic thermal expansion was observed. Upon heating, the crystal structure extends practically only along the a-axis.
KW - α-PbO
KW - Crystal structure
KW - Low temperature
KW - Single crystal X-ray analysis
KW - Thermal expansion
UR - http://www.scopus.com/inward/record.url?scp=27744502710&partnerID=8YFLogxK
U2 - 10.1016/j.solidstatesciences.2005.08.007
DO - 10.1016/j.solidstatesciences.2005.08.007
M3 - Article
AN - SCOPUS:27744502710
VL - 7
SP - 1363
EP - 1368
JO - Solid State Sciences
JF - Solid State Sciences
SN - 1293-2558
IS - 11
ER -
ID: 53953590