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tetrahedral

  
   
A shape resembling a tetrahedron, which is very common throughout chemistry. In the gas phase, this is the usual structure adopted by molecules with four bonding pairs of electrons (See valence-shell electron-pair repulsion theory), such as methane, tetrachloromethane, etc. The tetrahedral angle between the bonds is 109° 28\'. In the solid state tetrahedral holes are important for many structures including the fluorite structure. See Also: spinel.  

 

 

  
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Other Terms : thiopentone (sodium 5-ethyl-5-(1-methylbutyl)-2-thiobarbiturate) | frequency response (transfer function) | stellar evolution

 

 
 
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