Crystalline aluminophosphates compositions

Crystalline aluminophosphates and related compounds having in the as-synthesized anhydrous form the chemical composition: m'R(XnAlqPx)O2, wherein R represents ethylenediamine, X represents one or more elements which can be substituted for Al and/or P, wherein m'=0.01-0.33 n=0-0.50 q=0.30-0.60 x=0.30-0.60 and wherein n+q+x=1. The compounds can be prepared from a forming solution or gel comprising a source of aluminum, a source of phosphorus, ethylenediamine and optionally a source of at least one component X, which mixture is kept at elevated temperature for a period of time sufficient to produce a crystalline aluminophosphate or related compound followed by separating off the crystalline product obtained and drying, and which may subsequently be calcined.