Crystallization of Sodium Titanium Silicate with Sitinakite Topology:  Evolution from the Sodium Nonatitanate Phase

2004 ◽  
Vol 16 (19) ◽  
pp. 3659-3666 ◽  
Author(s):  
Dmitri G. Medvedev ◽  
Akhilesh Tripathi ◽  
Abraham Clearfield ◽  
Aaron J. Celestian ◽  
John B. Parise ◽  
...  
Keyword(s):  
Titanium Silicate ◽  
Sodium Nonatitanate

scholarly journals Continuous Liquid-Phase Epoxidation of Ethylene with Hydrogen Peroxide on a Titanium-Silicate Catalyst

2021 ◽  
Author(s):  
Matias Alvear ◽  
Michele Emanuele Fortunato ◽  
Vincenzo Russo ◽  
Kari Eränen ◽  
Martino Di Serio ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Titanium Silicate ◽  
Liquid Phase Epoxidation

A safer and greener chlorohydrination of allyl chloride with H 2 O 2 and HCl over hollow titanium silicate zeolite

2017 ◽  
Vol 543 ◽  
pp. 17-25 ◽  
Author(s):  
Xinxin Peng ◽  
Changjiu Xia ◽  
Min Lin ◽  
Xingtian Shu ◽  
Bin Zhu ◽  
...  
Keyword(s):  
Allyl Chloride ◽  
Titanium Silicate

Titanium silicate molecular sieve, TS-1, catalysed C–C bond formation in Mukaiyama type aldol reactions

1996 ◽  
pp. 129-130 ◽  
Author(s):  
M. Sasidharan ◽  
Satya V. N. Raju ◽  
K. V. Srinivasan ◽  
Vincent Paul ◽  
R. Kumar
Keyword(s):  
Molecular Sieve ◽  
Bond Formation ◽  
Aldol Reactions ◽  
Titanium Silicate

From Structure Topology to Chemical Composition. XXIX. Revision of the Crystal Structure of Perraultite, NaBaMn4Ti2(Si2O7)2O2(OH)2F, a Seidozerite-Supergroup TS-Block Mineral from the Oktyabr'skii Massif, Ukraine, and Discreditation of Surkhobite

2021 ◽  
Author(s):  
Elena Sokolova ◽  
Maxwell C. Day ◽  
Frank C. Hawthorne ◽  
Atali A. Agakhanov ◽  
Fernando Cámara ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Chemical Composition ◽  
Structure Type ◽  
Titanium Silicate ◽  
Space Group ◽  
Structure Topology ◽  
Ideal Composition ◽  
Using Data ◽  
Cation Sites ◽  
The Ideal

ABSTRACT The crystal structure of perraultite from the Oktyabr'skii massif, Donetsk region, Ukraine (bafertisite group, seidozerite supergroup), ideally NaBaMn4Ti2(Si2O7)2O2(OH)2F, Z = 4, was refined in space group C to R1 = 2.08% on the basis of 4839 unique reflections [Fo > 4σFo]; a = 10.741(6), b = 13.841(8), c = 11.079(6) Å, α = 108.174(6), β = 99.186(6), γ = 89.99(1)°, V = 1542.7(2.7) Å3. Refinement was done using data from a crystal with three twin domains which was part of a grain used for electron probe microanalysis. In the perraultite structure [structure type B1(BG), B – basic, BG – bafertisite group], there is one type of TS (Titanium-Silicate) block and one type of I (Intermediate) block; they alternate along c. The TS block consists of HOH sheets (H – heteropolyhedral, O – octahedral). In the O sheet, the ideal composition of the five [6]MO sites is Mn4 apfu. There is no order of Mn and Fe2+ in the O sheet. The MH octahedra and Si2O7 groups constitute the H sheet. The ideal composition of the two [6]MH sites is Ti2 apfu. The TS blocks link via common vertices of MH octahedra. The I block contains AP(1,2) and BP(1,2) cation sites. The AP(1) site is occupied by Ba and the AP(2) site by K > Ba; the ideal composition of the AP(1,2) sites is Ba apfu. The BP(1) and BP(2) sites are each occupied by Na > Ca; the ideal composition of the BP(1,2) sites is Na apfu. We compare perraultite and surkhobite based on the work of Sokolova et al. (2020) on the holotype sample of surkhobite: space group C , R1 = 2.85 %, a = 10.728(6), b = 13.845(8), c = 11.072(6) Å, α = 108.185(6), β = 99.219(5), γ = 90.001(8)°, V = 1540.0(2.5) Å3; new EPMA data. We show that (1) perraultite and surkhobite have identical chemical composition and ideal formula NaBaMn4Ti2(Si2O7)2O2(OH)2F; (2) perraultite and surkhobite are isostructural, with no order of Na and Ca at the BP(1,2) sites. Perraultite was described in 1991 and has precedence over surkhobite, which was redefined as “a Ca-ordered analogue of perraultite” in 2008. Surkhobite is not a valid mineral species and its discreditation was approved by CNMNC IMA (IMA 20-A).

ChemInform Abstract: Ba2Ti2Si2O9F2, a New Titanium Silicate.

ChemInform ◽  
2009 ◽  
Vol 40 (30) ◽  
Author(s):  
Matthew Mann ◽  
Joseph Kolis
Keyword(s):  
Titanium Silicate

Anion-Controlled Pore Size of Titanium Silicate Molecular Sieves

2009 ◽  
Vol 131 (2) ◽  
pp. 609-614 ◽  
Author(s):  
Christopher C. H. Lin ◽  
James A. Sawada ◽  
Lan Wu ◽  
Tony Haastrup ◽  
Steven M. Kuznicki
Keyword(s):  
Pore Size ◽  
Molecular Sieves ◽  
Titanium Silicate ◽  
Titanium Silicate Molecular Sieves

The sorption behaviour of synthetic sodium nonatitanate and zeolite A for removing radioactive strontium from aqueous wastes

2012 ◽  
Vol 96 ◽  
pp. 81-88 ◽  
Author(s):  
Aurélie Merceille ◽  
Evelyne Weinzaepfel ◽  
Yves Barré ◽  
Agnès Grandjean
Keyword(s):  
Zeolite A ◽  
Sorption Behaviour ◽  
Sodium Nonatitanate

Fischer-Tropsch synthesis on Co and Co(Ru-doped)ETS-10 titanium silicate catalysts

1996 ◽  
Vol 41 (1-2) ◽  
pp. 79-82 ◽  
Author(s):  
C. L. Bianchi ◽  
R. Carli ◽  
S. Merlotti ◽  
V. Ragaini
Keyword(s):  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Titanium Silicate ◽  
Fischer Tropsch Synthesis
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