کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1251434 | 1496067 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrothermal Synthesis and Thermal Stability of Natural Mineral Lindgrenite1
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A natural mineral, lindgrenite Cu3 (MoO4)2 (OH)2, was synthesized from a mixture of sodium molybdate, copper sulfate, and morpholine in water under autogenous pressure at 170 °C. The crystal structure of the mineral was determined and the final refinement for 791 observed reflections with I > 2Ï (I) gave R1 = 0.0205 and wR2 = 0.0496. The thermal stability of the mineral was investigated by using TG-DTA and variable-temperature in situ X-ray diffraction (XRD) techniques. The crystalline Cu3Mo2O9 was obtained when the mineral underwent thermal dehydration at a temperature ranging from 300 to 400 °C, and the mixture of MoO3 and CuO was formed through decomposition of Cu3 Mo2 O9 at a temperature ranging from 650 to 700 °C. Therefore, the structure of the mineral was thermally unstable at above 300 °C, suggesting that Lindgrenite was likely formed via the hydrothermal route occurring in the nature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Research in Chinese Universities - Volume 22, Issue 6, November 2006, Pages 679-683
Journal: Chemical Research in Chinese Universities - Volume 22, Issue 6, November 2006, Pages 679-683
نویسندگان
BAO Ren-lie, KONG Zu-ping, GU Min, YUE Bin, WENG Lin-hong, HE He-yong,