High-Pressure Framework Silicates

Recent syntheses of high-pressure alkali and alkaline earth silicates reveal a class of framework structures with corner-linked 4- and 6-coordinated silicon. These compounds possess the structural formula (A$^{1+}_{4-2x}$B$^{2+}_x$)Si$^{VI}_m$(Si$^{IV}_n$O$_{2(m+n)+2}$), where x, m, and n specify th...

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