Stories tagged amorphous

Jul
01
2006

Carbon Dioxide glass: source: Wikipedia  This diamond anvil is used to create pressures of several hundred thousand atmospheres.
Carbon Dioxide glass: source: Wikipedia This diamond anvil is used to create pressures of several hundred thousand atmospheres.
Carbon, silicon and germanium are the first three members of group IV of the periodic table of elements. Why then is CO2 a gas whereas SiO2 and GeO2 form a solid, glass like substance?
Mario Santoro and colleagues from the European Laboratory for Non-linear Spectroscopy and INFM recenttly discovered such a form of solid carbon dioxide.

"The new material, which was made by applying extreme pressures to normal solid carbon dioxide, resembles window glass on the atomic scale. Dubbed amorphous carbonia, the substance could be important for understanding the interiors of gas-giant planets in which carbon dioxide is squeezed at high pressures." (Nature 441 857)

"Another important implication is that mixtures of a-carbonia and a-silica could, in principle be used to make new amorphous glasses that would be very hard and stiff and likely stable at room temperature," adds Santoro. "Small amounts of these new glasses could be of interest for technology applications like hard and resistant coatings for micro-electronics, for example." PhysicsWeb

Turning carbon dioxide into glass form might even be a solution to stop its greenhouse effect.

Sources:
Abstract of paper from Nature
Editor's Summary; Nature