exception ElementError of string

type t 

(** String conversion functions *)
val of_string : string -> t
val to_string : t -> string
val to_long_string : t -> string

(** Properties *)
val to_charge : t -> Charge.t
val of_charge : Charge.t -> t
val covalent_radius : t -> Radius.t
val vdw_radius : t -> Radius.t
val mass : t -> Mass.t