import type { CompositionType } from './';
import type { ElementSymbol } from '../element';
export type FormulaSpecies = {
    element: ElementSymbol;
    amount: number;
    oxidation_state?: number;
};
type WildcardFormulaToken = {
    element: ElementSymbol | null;
    amount: number;
};
export type OxiComposition = Partial<Record<ElementSymbol, {
    amount: number;
    oxidation_state?: number;
}>>;
export declare const normalize_formula_unicode: (formula: string) => string;
export declare const parse_formula: (formula: string) => CompositionType;
export declare const parse_formula_with_oxidation: (formula: string) => FormulaSpecies[];
export declare const parse_formula_with_wildcards: (formula: string) => WildcardFormulaToken[];
export declare const extract_formula_elements: (formula: string, { sorted }?: {
    sorted?: boolean;
}) => ElementSymbol[];
export declare const parse_composition: (input: string | CompositionType | Record<number, number> | Record<string | number, number>) => CompositionType;
export declare const fractional_composition: (composition: CompositionType, by_weight?: boolean) => CompositionType;
export {};