کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1522148 | 995306 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Monoclinic RbD2PO4: Room temperature synthesis, chemical and structural stability upon heating
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Monoclinic RbD2PO4 polycrystals (DRDP) were synthesized via the room temperature crystallization of RbH2PO4 (RDP) dissolved in D2O. Powder X-ray diffraction (XRD) data collected at T = 25 °C indicate that this deuterated compound crystallizes in spacegroup P21/m with unit cell parameters a = 7.688 Ã
, b = 6.192 Ã
, c = 4.781 Ã
and β = 109.02°, and is isomorphic with the intermediate-temperature phase of its hydrogenated counterpart RDP. We found no evidence of a previously reported [Phase Transitions 80, 17 (2007)] polymorphic phase transition in DRDP upon heating from room temperature to 210 °C. All lattice parameters vary smoothly within this temperature range, demonstrating that the P21/m phase persists upon heating. In addition, the unit cell volume of monoclinic DRDP is â¼1% greater than that of its RDP polymorph at all temperatures between 150 °C and 210 °C, which indicates the absence of significant deuterium-hydrogen isotope exchange. Further heating to 240 °C leads to the thermal decomposition of the title compound via dehydration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 143, Issue 2, 15 January 2014, Pages 605-610
Journal: Materials Chemistry and Physics - Volume 143, Issue 2, 15 January 2014, Pages 605-610
نویسندگان
Cristian E. Botez, Masoud Mollaee, Andres J. Encerrado Manriquez, Michael P. Eastman,