Database of Disordered Zeolite Structures
Intergrowth Family CIT-13
    Refinement shows that the two d4r unit positions are equally occupied  
    Kang, J.H., Xie, D., Zones, S.I., Smeets, S., McCusker, L.B. and Davis, M.E.
Synthesis and characterization of CIT-13, a germanosilicate molecular sieve with extra-large pore openings
Chem. Mater., 28, 6250-6259 (2016)
  |(DMMBI+)6.6F4| [Si108.68Ge19.32O256]
DMMBI+ = C13H17N2+ = 1,2-dimethyl-3-(3-methylbenzyl)imidazolium ion
= 1,2-dimethyl-3-[(3-methylphenyl)methyl]imidazol-1-ium  Images:  stick or 3D
    Gao, Z.-H., Chen, F.-J., Xu, L., Sun, L., Xu, Y. and Du, H.-B.
A stable extra-large-pore zeolite with intersecting 14- and 10-membered-ring channels
Chem. Eur. J., 22, 14367-14372 (2016)
    Firth, D.S., Morris, A.A., Wheatley, P.S., Russell, S.E., Slawin, A.M.Z., Dawson, D.M., Mayoral, A., Opanasenko, M., Polozij, M., Čejka, J., Tachtigall, P. and Morris, R.E.
Assembly–Disassembly–Organization–Reassembly synthesis of zeolites based on cfi-type layers
Chem. Mater., 29, 5605-5611 (2017)
  [Ge - Si - O]