Crystallographic Information Framework

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Core dictionary version 3.0.14

_atom_site.U_equiv_geom_mean

Name:
_atom_site.U_equiv_geom_mean

Alias:
_atom_site_U_equiv_geom_mean

Definition:

   
     Equivalent isotropic atomic displacement parameter, U(equiv),
     in angstroms squared, calculated as the geometric mean of
     the anisotropic atomic displacement parameters.
 
            U(equiv) = (U~i~ U~j~ U~k~)^1/3^
 
     U~n~ = the principal components of the orthogonalised U^ij^

Type: Real

Units: angstrom_squared


The permitted range is 0.0 → infinity

Category:
atom_site