Item _atom_site.B_equiv_geom_mean
Description
Equivalent isotropic atomic displacement parameter, B~eq~,
in angstroms squared, calculated as the geometric mean of
the anisotropic atomic displacement parameters.
B~eq~ = (B~i~ B~j~ B~k~)^1/3^
B~n~ = the principal components of the orthogonalized B^ij^
The IUCr Commission on Nomenclature recommends against the use
of B for reporting atomic displacement parameters. U, being
directly proportional to B, is preferred.
Category
atom_site
Mandatory Code
no
Data Type Code
float
Units
8pi2_angstroms_squared
Enumeration Range
| Minimum Value |
Maximum Value |
| 0.0 |
n.a. |
| 0.0 |
0.0 |
Alias Names
| Alias Name |
Dictionary |
Version |
| _atom_site_B_equiv_geom_mean |
cif_core.dic |
2.0.1 |
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