Crystalline aluminophosphates and related compounds having in the as-synthesized anhydrous form the chemical composition mR(X.sub.n Al.sub.q P.sub.x)O.sub.2, wherein R represents 1,4-diaminobutane as defined hereinbefore, X represents one or more elements which can be substituted for Al and/or P, whereinm=0-0.33n=0-0.40q=0.30-0.60x=0.30-0.60and wherein n+q+x=1 and having an X-ray diffraction pattern containing at least the lines as given in Table A, B, C, D, E or F.The compounds can be prepared from a forming solution or gel comprising a source of alumina, a source of phosphorus, 1,4-diaminobutane and optionally a source of at least one component X wherein the various sources are present in certain specified molar ratios, by keeping the solution or gel at elevated temperature for a time sufficient to produce crystalline aluminophosphates or related compounds.