کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1594228 | 1515692 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stable phase with the α-PbO2 type structure in MgF2 under high pressure and high temperature
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Stable phase with the α-PbO2 type structure in MgF2 under high pressure and high temperature Stable phase with the α-PbO2 type structure in MgF2 under high pressure and high temperature](/preview/png/1594228.png)
چکیده انگلیسی
High-pressure and high-temperature behavior of MgF2 was observed up to 15 GPa and 750 âC by an in-situ X-ray diffraction method. The single phase with the α-PbO2 type structure was obtained at 12.7 GPa and 750 âC. The phase was almost quenchable to ambient condition. Its orthorhombic cell parameters were a0=4.590(1)Ã
, b0=5.555(1)Ã
and c0=5.048(1)Ã
and its volume per chemical formula was 1.1% smaller than that of the rutile phase at ambient condition. MgF2 was confirmed to have a stable region for the phase at around 13 GPa and 600 âC and to have the rutile-CaCl2-α-PbO2-PdF2 type phase transition series under high pressure and high temperature, as predicted by a previous theoretical calculation method. The bulk modulus of the α-PbO2 type phase was determined to be K0=98.0(7)GPa.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 148, Issues 9â10, December 2008, Pages 440-443
Journal: Solid State Communications - Volume 148, Issues 9â10, December 2008, Pages 440-443
نویسندگان
Keiji Kusaba, Takumi Kikegawa,