Several types of silicate and their hydrolyzed polysilanols were applied to the synthesis of polyhedral oligomeric silsesquioxanes (POSSs). Silicate cubic octasilicate [SiO]5 was silylated with trimethylchlorosilane to yield the incompletely trimethylsilylated cubic octasilicate [SiO](SiMe)H 1b bearing...
core-loss edge shapes of the third-row XO (super n-) 4 (X = Al, Si, S, and P) series attests to a common molecular-orbital picture of their bonding. For Qand some Q 1 spectra a "structure fingerprint" is defined because the Si L (sub 2,3) -edge shapes are indicative of ...
A series of novel vanadium silicates with open-framework and microporous structures has been synthesized under mild hydrothermal conditions. Ten distinct framework types have been identified that all have structures based on cross-linking single silicate sheets with square pyramidal V(IV)O(5) units to...
Indeed the surface structure and area of the Ca3SiO5 particles strongly affect their reactivity, which must be carefully controlled to ensure meaningful results23. For example, the high surface area of the synthesized 29Si-enriched Ca3SiO5 (4.4 m2 g À 1, see Supplementary Methods) allowed B...
The project investigated the simultaneous ball milling and carbonation of Ca- and Mg-hydroxides and natural Canadian silicates (kimberlite and wollastonite) using a Retsch GrindControl jar reactor. Three additives (NaOH, MgCl2, and CH3CH2OH) were examined for their potential to enhance carbonation ...
In the 1980s, research activities were again escalated by the discovery of aluminophosphate molecular sieves and their derivatives, silico-, metallo-, metallo-silico-aluminophosphates by Union Carbide [12] and of titanosilicate molecular sieves by Eniricerche [11–13,72]. Around the turn of the ...
Preparation of alkaline-earth metal silicates from gels and their NOx-adsorption behavior Processing of Ca and Ba silicates from gels was investigated aiming at the application to a NOx absorbent. The gels were prepared from RnSi(OC2H5)4−n, H... Shingo,Katayama,and,... - 《Journal of ...
Interstellar silicates play a key role in star formation and in the origin of solar systems, but their synthetic routes have remained largely elusive so far. Here we demonstrate in a combined crossed molecular beam and computational study that silicon dioxide (SiO2) along with silicon monoxide (Si...
Among the group of minerals referred to as ‘non-silicateoxidesand hydroxides’ (Newman, 1987), the ‘layered double hydroxides’ (LDH) have many physical and chemical properties that are surprisingly similar to those of (cationic) clay minerals. Their layered structure, wide chemicalcomposition(due...
all of which have f.c.c. phases at their melting points. However, in the case of Pt, the single diffusion measurement cited by Brown and Ashby was obtained by quantifying the decrease in surface activity with annealing [25]. Alternative data acquired with sectioning techniques are likely more...