کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1333103 979067 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pr4B10O21: A new composition of rare-earth borates by high-pressure/high-temperature synthesis
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Pr4B10O21: A new composition of rare-earth borates by high-pressure/high-temperature synthesis
چکیده انگلیسی

High-pressure chemistry led to the synthesis of the rare-earth borate Pr4B10O21 using a Walker-type multianvil apparatus at 3.5 GPa and 1050 °C. The tetra-praseodymium(III)-decaborate crystallizes monoclinicly with four formula units in the space group P21/n and lattice parameters of a=710.2(2), b=1948.8(4), c=951.6(2) pm, and β=93.27(3)°. The boron–oxygen network consists of [BO4]5− tetrahedra and [BO3]3− groups; however, the [BO4]5− groups represent the major part (80%) due to the high-pressure conditions during the synthesis. The praseodymium ions are coordinated by 10 and 12 oxygen atoms. Along with a detailed description of the crystal structure, temperature programmed X-ray powder diffraction data are shown, demonstrating the metastable character of this compound.

Synthesis of Pr4B10O21 via the multianvil high-pressure/high-temperature technique representing a new composition of rare-earth borates.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 180, Issue 5, May 2007, Pages 1595–1600
نویسندگان
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