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Core CIF Dictionary version 2.3

_chemical_formula_sum

Name

'_chemical_formula_sum'

Category: chemical_formula

Data type: char

Examples:

'C18 H19 N7 O8 S'

Definition

    	
See _chemical_formula_[] for the rules for writing chemical formulae in which all discrete bonded residues and ions are summed over the constituent elements, following the ordering given in general rule 5 in _chemical_formula_[]. Parentheses are not normally used.

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