@article{bf5f82ae1e27482490f95b1b1e800583,
title = "Synthesis and crystal chemical characterization of the pyrochlore type MgZrSi2O7",
abstract = "The pyrochlore type of MgZrSi2O7 was synthesized at 25 GPa and 1500 °C using a Kawai-type, multi-anvil apparatus. Powder X-ray diffraction and Rietveld analysis revealed that the phase assumed the pyrochlore structure (space group Fd{\=3}m, cubic) with the lattice parameter a = 9.2883(1) and the structural parameter x = 0.4295(4). Chemical analysis by the electron probe microanalysis (EPMA) confirmed the stoichiometry of MgZrSi 2O7. It was demonstrated that the eight-fold coordinated 16c site is randomly occupied by both Mg2+ and Zr4+ ions in a 1:1 ratio. The high ionic radius ratio RA/RB (where A and B denote Mg + Zr and Si, respectively) of 2.22 necessitates a relatively high pressure to stabilize the pyrochlore structure.",
keywords = "Chemical synthesis, Crystal structure, Powder diffraction, Rietveld analysis",
author = "Junshan Xu and Eiji Ito and Daisuke Yamazaki and Xinzhuan Guo and Xiaoping Wu",
note = "Funding Information: This work was supported by JSPS (Grant-in-Aid for Scientific Research, No. 21340128029 ), the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KZCX2-YW-QN508 ) and funds from the Natural Science Foundation of China (No. 40874034 ). We thank the joint-doctoral program organized by the China Scholarship Council, Prof. Tomoo Katsura for giving advice and suggestions and all of the members of the HACTO group in the Institute for Study of the Earth's Interiors, Okayama University. ",
year = "2011",
month = aug,
day = "15",
doi = "10.1016/j.matchemphys.2011.03.017",
language = "English",
volume = "128",
pages = "410--412",
journal = "Materials Chemistry and Physics",
issn = "0254-0584",
publisher = "Elsevier BV",
number = "3",
}