Data Item _atom_type.scat_Cromer_Mann_a2
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General 
- Item name
- _atom_type.scat_Cromer_Mann_a2
- Category name
- atom_type
- Attribute name
- scat_Cromer_Mann_a2
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 0.03 % of entries
Item Description
The Cromer-Mann scattering-factor coefficient a2 used to
calculate the scattering factors for this atom type.
Ref: International Tables for X-ray Crystallography (1974).
Vol. IV, Table 2.2B
or: International Tables for Crystallography (2004). Vol. C,
Tables 6.1.1.4 and 6.1.1.5.
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]+)?
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _atom_type_scat_Cromer_Mann_a2 | cif_core.dic | 2.0.1 |