Data Item _chemical_formula.weight
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General 
- Item name
- _chemical_formula.weight
- Category name
- chemical_formula
- Attribute name
- weight
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
Formula mass in daltons. This mass should correspond to the
formulae given under _chemical_formula.structural,
_chemical_formula.moiety or _chemical_formula.sum and,
together with the Z value and cell parameters, should
yield the density given as _exptl_crystal.density_diffrn.
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 |
|---|---|
| 1.0 | +∞ |
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _chemical_formula_weight | cif_core.dic | 2.0.1 |