Data Item _atom_type.symbol
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General 
- Item name
- _atom_type.symbol
- Category name
- atom_type
- Attribute name
- symbol
- Required in PDB entries
- yes
- Used in current PDB entries
- Yes, in about 100.0 % of entries
Item Description
The code used to identify the atom species (singular or plural)
representing this atom type. Normally this code is the element
symbol. The code may be composed of any character except
an underscore with the additional proviso that digits designate
an oxidation state and must be followed by a + or - character.
Item Example1
C
Item Example2
Cu2+
Item Example3
H(SDS)
Item Example4
dummy
Item Example5
FeNi
Data Type 
- Data type code
- code
- Data type detail
- code item types/single words ...
- Primitive data type code
- char
- Regular expression
- [][_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _atom_type_symbol | cif_core.dic | 2.0.1 |