Data Item _exptl_crystal.pdbx_mosaicity
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General 
- Item name
- _exptl_crystal.pdbx_mosaicity
- Category name
- exptl_crystal
- Attribute name
- pdbx_mosaicity
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 2.9 % of entries
Item Description
Isotropic approximation of the distribution of mis-orientation angles
specified in degrees of all the mosaic domain blocks in the crystal,
represented as a standard deviation. Here, a mosaic block is a set of
contiguous unit cells assumed to be perfectly aligned. Lower mosaicity
indicates better ordered crystals. See for example:
Nave, C. (1998). Acta Cryst. D54, 848-853.
Note that many software packages estimate the mosaic rotation distribution
differently and may combine several physical properties of the experiment
into a single mosaic term. This term will help fit the modeled spots
to the observed spots without necessarily being directly related to the
physics of the crystal itself.
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]+)?
- Units
- degrees
Allowed Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 0 | +∞ |
Related Items 
| Related Item Name | Relation Type |
|---|---|
| _exptl_crystal.pdbx_mosaic_method | associated_value |