Title : Selenium, the Element of Moon in Life on Earth - IRCC
Title : Selenium, the Element of Moon in Life on Earth - IRCC
Title : Selenium, the Element of Moon in Life on Earth - IRCC
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Allotropes <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>Selenium</str<strong>on</strong>g><br />
‣ Grey (trig<strong>on</strong>al) selenium<br />
(Se n helical cha<str<strong>on</strong>g>in</str<strong>on</strong>g> polymers)<br />
‣ Grey (rhombohedral) selenium<br />
(Se 6 molecules)<br />
‣ Three deep-red (m<strong>on</strong>ocl<str<strong>on</strong>g>in</str<strong>on</strong>g>ic) forms<br />
(α, β, and γ-selenium c<strong>on</strong>ta<str<strong>on</strong>g>in</str<strong>on</strong>g><str<strong>on</strong>g>in</str<strong>on</strong>g>g<br />
Se 8 molecules)<br />
‣ Amorphous red selenium<br />
‣ Black vitreous selenium<br />
‣ Most <str<strong>on</strong>g>the</str<strong>on</strong>g>rmodynamically stable and<br />
<str<strong>on</strong>g>the</str<strong>on</strong>g> densest form: gray (trig<strong>on</strong>al)<br />
http://en.wikipedia.org/wiki/File:SeBlackRed.jpg<br />
http://www.chemistryexpla<str<strong>on</strong>g>in</str<strong>on</strong>g>ed.com/A-Ar/Allotropes.html
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