The crystal structure of synthetic kenyaite, Na2Si20O40(OH)2·8H2O

Bridging the Gap between Zeolites and Dense Silica Polymorphs: Formation of All‐Silica Zeolite with High Framework Density from Natural Layered Silicate Magadiite

“…A prospect for the synthesis of zeolites with even higher FD is the use of kenyaite. [28] Kenyaite is a layered silicate with a structure similar to that of magadiite, but the silicate layers are thicker than those in magadiite. The thicker layers consist of two β-quartz layers, as schematically shown in Figure 7.…”

“…Consequently, RWZ‐1 shows anisotropic thermal expansion and, generally, represents a valuable material intermediate between dense silica polymorphs and zeolites. A prospect for the synthesis of zeolites with even higher FD is the use of kenyaite [28] . Kenyaite is a layered silicate with a structure similar to that of magadiite, but the silicate layers are thicker than those in magadiite.…”

Ion-exchange and antibacterial properties of layered silicate, Na-kenyaite, prepared using amorphous silicon dioxide (a-SiO₂) blocks

“…11) Compared with magadiite, kenyaite has received little attention, and few studies have reported its synthesis. 11),15), 16) The crystal structure of Na-kenyaite was determined by Marler et al (2021). 17) This compound has been used as a precursor to prepare porous silicates by pillaring, 18) conversion into the corresponding acidic form with silanol groups for coupling with a silylating agent to provide an organofunctionalized material, 19) and intercalation.…”

“…11),15), 16) The crystal structure of Na-kenyaite was determined by Marler et al (2021). 17) This compound has been used as a precursor to prepare porous silicates by pillaring, 18) conversion into the corresponding acidic form with silanol groups for coupling with a silylating agent to provide an organofunctionalized material, 19) and intercalation. 20),21) Although Ag + -ion-exchanged kenyaite has been tested against gram-negative [Escherichia coli (E. coli)] bacteria, 22) there have been no reports on the antibacterial behavior of Ag + -ion-exchanged kenyaite against grampositive bacteria and Cu 2+ -ion-exchanged kenyaite against gram-negative or gram-positive bacteria.…”

The steps of thermal treatment of Na-magadiite: a computational study using ab initio DFT calculations

“…Na-Magadiite, Na 2 Si 14 O 28 (OH) 2 Á8H 2 O, a natural hydrous layered silicate from the same family as RUB-18 or ilerite, 1 kanemite 2 and kenyanite, 3 is formed by negatively charged layers with rings of syloxanes and silanol/silanolates groups, which are compensated by hydrated sodium cations in the interlayer region. Since it was discovered in 1967, 4 there have been extensive characterization studies in the literature (XRD, solid state 29 Si and 23 Na NMR, and FT-IR [5][6][7][8][9] ); however, the structural elucidation of magadiite has remained unattended for decades.…”