The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The clathrate form of silicon, Si 136 (otherwise known as Si 34 ), having a residual sodium content as low as 35 ppm (i.e., x~0.0058 in Na x Si 136 ), has been prepared by thermal decomposition of NaSi under high vacuum, followed by several other treatments under vacuum, and completed by repeated reactions with iodine. The residual amount of...
Low sodium content silicides discovered by some of us in the sixties are compared to some analogous families of materials. As endofullerenes constituted by the smallest Si 20 , Si 24 and Si 28 clusters, they are polymerized in 3D-structures of face sharing polyhedra, giving rise to clathrate-like structures (similar to those of the gas and liquid hydrates). Several...
Thin films of boron-substituted carbons have been synthesized by chemical vapor deposition. X-ray diffraction measurements showed that the d (002) value depends both on B at.% in the deposits and on the reaction temperature. Addition of boron increases the crystallinity up to a certain boron concentration, but beyond this critical value, on the contrary, the crystallinity...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.