preparing a reaction mixture comprising {HEAD ~ sources} of alumina, phosphorus, and, optionally, silica and further comprising {TAIL ~ at least one first organic directing agent} for directing the synthesis of an AFX framework type molecular sieve and at least one second organic directing agent for directing the synthesis of a CHA framework type molecular sieve 
preparing a reaction mixture comprising { HEAD ~ sources } of alumina , phosphorus , and , optionally , silica and further comprising { TAIL ~ at least one first organic directing agent } for directing the synthesis of an AFX framework type molecular sieve and at least one second organic directing agent for directing the synthesis of a CHA framework type molecular sieve
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH