PKU-20: A new silicogermanate constructed from sti and asv layers
Number of Authors: 10
2016 (English)In: Microporous and Mesoporous Materials, ISSN 1387-1811, E-ISSN 1873-3093, Vol. 224, 384-391 p.Article in journal (Refereed) Published
A new silicogermanate (PKU-20) was hydrothermally synthesized using triethylisopropylammonium cation as the structure directing agent in the presence of fluoride. Its structure was determined from a combination of synchrotron single crystal X-ray diffraction and powder X-ray diffraction data. PKU-20 crystallizes in the monoclinic space group C2/m, with the lattice parameters of a = 18.5901(6) angstrom, b = 13.9118 (4) angstrom, c = 22.2614(7) angstrom and beta = 100.1514 (12)degrees. The framework of PKU-20 is constructed from an alternate stacking of sti and asv layers. The sti layer is exactly the same as that in the STI framework, while the asv layer is a new layer sliced off from the ASV framework parallel to the (112) plane. The takeout scheme of the layer is discussed on the basis of a composite building unit D4R-/au-D4R. PKU-20 possesses a two-dimensional channel system, where the 10-ring channels parallel to the  direction are intercrossed by 12-ring pockets along the  direction.
Place, publisher, year, edition, pages
2016. Vol. 224, 384-391 p.
PKU-20, STI framework, ASV framework, Silicogermanate, Hydrothermal synthesis
Chemical Sciences Nano Technology Materials Engineering
IdentifiersURN: urn:nbn:se:su:diva-129196DOI: 10.1016/j.micromeso.2015.12.052ISI: 000371841000046OAI: oai:DiVA.org:su-129196DiVA: diva2:935185