Solid Solution of Cristobalite and Cristobalite-type AlPO<sub>4</sub>
نویسندگان
چکیده
منابع مشابه
Retraction: Carbon enters silica forming a cristobalite-type CO2–SiO2 solid solution
In this Article, we reported the synthesis of a crystalline CO2–SiO2 solid solution by reacting carbon dioxide and silica in a laser-heated diamond anvil cell at pressures between 16 and 22GPa and temperatures greater than 4,000K, and showed that carbon enters silica. We have now reanalysed all our X-ray diffraction patterns, in particular those at room pressure where potential volatile compone...
متن کاملCarbon enters silica forming a cristobalite-type CO2–SiO2 solid solution
Extreme conditions permit unique materials to be synthesized and can significantly update our view of the periodic table. In the case of group IV elements, carbon was always considered to be distinct with respect to its heavier homologues in forming oxides. Here we report the synthesis of a crystalline CO2-SiO2 solid solution by reacting carbon dioxide and silica in a laser-heated diamond anvil...
متن کاملPressure-induced transformations of cristobalite
X-ray in situ studies in electrically and laser-heated diamond anvil cells (DACs) at pressures over 80 GPa and temperatures above 2500 K were used to determine stable silica phase at extreme conditions. We demonstrate that so far unidenti®ed phases obtained on the compression of a-cristobalite, new dense silica polymorph in the Martian Shergotty meteorite, and controversial post-stishovite phas...
متن کاملThe High Pressure Behavior of Cristobalite
The most abundant rock-forming minerals in the eanh's crust are framework silicates with complex crystal structures. These materials displaya remarkable chemical and structUral diversity. In addition,~structUral phase transitions involving displacive distonions are panicularly common, leading to yet more structural variation. There have been suggestions that the distonive behavior of the framew...
متن کاملThe pressure behavior of a cristobalite
Structural and volume compressibility data for two a cristobalite samples were determined by single-crystal X-ray diffraction methods at pressures up to -1.6 GPa. As with the other silica polymorphs that have been studied at high pressure, the change of the SiO-Si angle is correlated with the volume compressibility. The Si-O bond lengths and the O-Si-O angles remain essentially unchanged. The b...
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ژورنال
عنوان ژورنال: Journal of the Ceramic Association, Japan
سال: 1964
ISSN: 0009-0255,1884-2127
DOI: 10.2109/jcersj1950.72.822_94