Editing Zeolite (section)

===Isomorphous substitution===
[[Isomorphous substitution]] of Si in zeolites can be possible for some heteroatoms such as [[titanium]],<ref name="ref12">{{Ref patent|country=US|number=4410501A|status=patent|gdate=1979-12-21|title = Preparation of porous crystalline synthetic material {{sic|comprised |hide=y|of}}} silicon and titanium oxides}}</ref> [[zinc]]<ref name="ref13">{{Ref patent|country=US|number=2016243531A1|status=patent|gdate=2015-02-24|title = Processes for preparing zincoaluminosilicates with aei, cha, and gme topologies and compositions derived therefrom}}</ref> and [[germanium]].<ref name="ref14">{{Cite journal|title=Post-Synthesis Stabilization of Germanosilicate Zeolites ITH, IWW, and UTL by Substitution of Ge for Al|url=https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/chem.201603434|journal=Chemistry: A European Journal|volume=22|issue=48|pages=17377–17386|year=2016|doi=10.1002/chem.201603434 |last1=Shamzhy |first1=Mariya V. |last2=Eliašová |first2=Pavla |last3=Vitvarová |first3=Dana |last4=Opanasenko |first4=Maksym V. |last5=Firth |first5=Daniel S. |last6=Morris |first6=Russell E. |pmid=27754569 |hdl=10023/11880 |hdl-access=free }}</ref> Al atoms in zeolites can be also structurally replaced with [[boron]]<ref name="ref15">{{Ref patent|country=US|number=5187132A|status=patent|gdate=1993-02-16|title = Preparation of borosilicate zeolites}}</ref> and [[gallium]].<ref name="ref16">{{Cite journal|title=Incorporation of Gallium into Zeolites: Syntheses, Properties and Catalytic Application|journal=Chem. Rev.|issue=100|pages=2303–2405|year=2000}}</ref>

The [[silicoaluminophosphate]] type (AlPO molecular sieve),<ref name="ref17">{{Cite journal|title=Crystal Structure of Tetrapropylammonium Hydroxide-Aluminium Phosphate Number 5|journal=ACS Sym. Ser.|issue=218|pages=109–118|year=1983}}</ref> in which Si is isomorphous with Al and P and Al is isomorphous with Si, and the gallogermanate<ref name="ref18">{{Cite journal|title=Hydrothermal synthesis and structural characterization of zeolite-like structures based on gallium and aluminium germanates|journal=J. Am. Chem. Soc.|issue=120|pages=13389–13397|year=1998}}</ref> and others are known.