High-pressure behavior of the synthetic Ca2Sb2O7 weberite-type compound

Autor: T. Boffa Ballaran, Luca Bindi, Fabrizio Nestola, Laura Chelazzi, Paola Bonazzi
Rok vydání: 2011
Předmět:
Zdroj: Solid state sciences 13 (2011): 1092–1095. doi:10.1016/j.solidstatesciences.2011.01.013
info:cnr-pdr/source/autori:Chelazzi, L. [ 1 ] ; Boffa Ballaran, T. B. [ 2 ] ; Nestola, F. [ 3 ] ; Bindi, L. [ 4,5 ] ; Bonazzi, P. [ 1,5 ]/titolo:High-pressure behavior of the synthetic Ca2Sb2O7 weberite-type compound/doi:10.1016%2Fj.solidstatesciences.2011.01.013/rivista:Solid state sciences/anno:2011/pagina_da:1092/pagina_a:1095/intervallo_pagine:1092–1095/volume:13
ISSN: 1293-2558
DOI: 10.1016/j.solidstatesciences.2011.01.013
Popis: An in situ high-pressure X-ray diffraction study has been carried out at room temperature up to 9.23 GPa on a crystal of Ca 2 Sb 2 O 7 having a weberite-2 O structure synthesized by solid-state reaction. A 2nd-order Birch–Murnaghan Equation of State (EoS) was used to refine the pressure–volume data. The refinement of the unit-cell volume and of the isothermal bulk modulus at room pressure leads to: V 0 = 555.8 (1), K T 0 = 154.6 (9) GPa. Unit-cell parameters decrease gradually as a function of pressure with a bulk modulus anisotropy scheme K a 0 > K b 0 > K c 0 , with c being the softest direction. The compressional behavior of Ca 2 Sb 2 O 7 is compared with that shown by ingersonite, Ca 3 MnSb 4 O 14 , a mineral showing a weberite-3 T structure.
Databáze: OpenAIRE
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