Chemistry Nexus

by WebElements: the periodic table on the web

Cold working of sodium metal converts body centred sodium metal to a mixture of a hexagonal form and body centred sodium at 5 K. The hexagonal from converts back to the body-centred form at 100-100 K.Cold working of lithium metal converts body centred lithium metal to a mixture of a hexagonal form and body centred lithium at 78 K.

Potassium, rubidium, and caesium retain their body centred structure after cooling.

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December 24th, 2009

Posted In: Chemistry, Crystallography, Group 1 elements

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gas-giant planet orbiting the yellow Sun-like star HD 209458. Credit: G. Bacon, STScI

gas-giant planet orbiting the yellow Sun-like star HD 209458. Credit: G. Bacon, STScI

Scientists crossed a new frontier in exo-planet research just last year when, using the Hubble Space Telescope, they detected sodium by its characteristic orange colour in the atmosphere of a large alien world orbiting the star HD 209458. Perhaps we are seeing ETs street lighting from a distance?

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December 8th, 2009

Posted In: Analytical chemistry, Atmospheric chemistry, Chemistry

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