Data Item _reflns_shell.Rmerge_F_gt
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General 
- Item name
- _reflns_shell.Rmerge_F_gt
- Category name
- reflns_shell
- Attribute name
- Rmerge_F_gt
- Required in PDB entries
- no
- Used in current PDB entries
- No
Item Description
The value of Rmerge(F) for significantly intense reflections
(see _reflns.threshold_expression) in a given shell.
sumi ( sumj | Fj - <F> | )
Rmerge(F) = --------------------------------
sumi ( sumj <F> )
Fj = the amplitude of the jth observation of reflection i
<F> = the mean of the amplitudes of all observations of
reflection i
sumi is taken over all reflections
sumj is taken over all observations of each reflection.
Data Type 
- Data type code
- float
- Data type detail
- float item types are the subset of numbers that are the floating numbers.
- Primitive data type code
- numb
- Regular expression
- -?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?
Allowed Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 0.0 | +∞ |
Related Items 
| Related Item Name | Relation Type |
|---|---|
| _reflns_shell.Rmerge_F_obs | alternate |
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _reflns_shell_Rmerge_F_gt | cif_core.dic | 2.3 |