高溫高壓水熱合成矽酸與鍺酸鈾 ; High-temperature, high-pressure hydrothermal synthesis of uranium silicates and germanates

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/59303

Title:	高溫高壓水熱合成矽酸與鍺酸鈾;High-temperature, high-pressure hydrothermal synthesis of uranium silicates and germanates
Authors:	李光華
Contributors:	國立中央大學化學系
Keywords:	化學;鈾;矽酸鹽;鍺酸鹽;水熱合成;;uranium;silicate;germanate;hydrothermal synthesis
Date:	2013-05-01
Issue Date:	2013-05-07 15:53:57 (UTC+8)
Publisher:	行政院國家科學委員會
Abstract:	矽酸鈾是六價鈾元素最豐富的礦物，研究它的結構化學有助於瞭解核廢料的演化產物。此計畫將置重點於高溫高壓水熱（500-600 ℃，1000-2000 bar）合成鈾金屬矽酸鹽與鍺酸鹽，尤其是具有特殊氧化態，或是混合價位的化合物。也將合成鈾 silicophosphate 或是germanophosphate，以增加結構的多樣性。除了合成與結構鑑定外，也研究發光性質、XPS、與XANES 光譜。 ; Uranyl silicates are the most abundant group of uranium(VI) minerals and their structural chemistry has been extensively studied because an understanding of their structures may be a key to understanding the long-term performance of a geological repository for nuclear waste. We propose to synthesize new silicates and germanates of uranium, particularly those with unusual oxidation states and mixed-valence compounds. The synthesis of uranium silicophosphates and germanophosphates will also be performed to increase the diversity of the framework structures. The synthetic method is mainly high-temperature, high-pressure hydrothermal reactions in gold ampoules contained in a high-pressure reaction vessel at 500-600 ºC and 1000-2000 bar. Their crystal structures, photoluminescence properties, XPS and XANES spectroscopy will be studied. ; 研究期間 10208 ~ 10307
Relation:	財團法人國家實驗研究院科技政策研究與資訊中心
Appears in Collections:	[Department of Chemistry] Research Project

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