The investigation on the modification of NaY zeolite on LaHY and AEHY (AE refers Ca and Sr and the molar ratio of Ca and Sr is 1:1) zeolites was proformed by XRD, N2-physisorption (BET), XRF, XPS, NH3-TPD, Py-IR, hydrothermal stability, and catalytic cracking test. These results indicate that HY zeolite with ultra low content Na can be obtained from NaY zeolite through four exchange four calcin...

In the last five years a large number of new high-temperature superconductors have been predicted and experimentally discovered among hydrogen-rich crystals, at pressures which are way too high to meet any practical application. this work, we report computational prediction hydride superconductor, LaBH$_{8}$, with T$_{c}$ 126 K pressure 50 GPa, thermodynamically stable above 100 dynamically dow...

Colorless Na4(Al3Si3O12)Cl sodalite exhibits the propensity to host sulfur atoms that give rise interesting optical properties. Namely, observed color, luminescence, and photochromism properties are commonly associated with presence of specific (Sn)x− species (n = 2 or 3; x 1 2) trapped in lattice concomitantly chlorine vacancies, when needed for charge balance. In this paper, we present a theo...

Type C CAIs are a rare group of refractory inclusions in carbonaceous chondrites that compositionally and isotopically distinct from the more commonly observed igneous (i.e., As Bs). We have investigated forsterite-bearing CAI ALNH-04 Allende CV3 chondrite. This has both textural compositional similarities to some previously reported; however, there notable differences imply may formed differen...

Sodalite Na8(Al6Si6O24)Cl2 (space group P4¯3n) is an important mineral belonging to the zeolite group, with several and manyfold fundamental technological applications. Despite interest in this from different disciplines, very little known regarding its high-pressure elastic properties. The present study aims at filling knowledge gap, reporting equation of state moduli sodalite calculated a wid...

Radioactive strontium (90Sr) is an important constituent of the complex wastes from past nuclear weapons production and has been stored in underground tanks at U.S. DOE sites (e.g., Hanford, WA). Using bulk and microfocused EXAFS spectroscopy, we examined temporal changes in solid-phase Sr speciation in kaolinite samples reacted for 1-369 d with high-pH, high ionic strength synthetic tank-waste...

Aluminum metal is produced by the electrolytic reduction of aluminum oxide (Al2O3), mainly extracted from bauxite ore digested in a hot caustic soda solution. This solution is supersaturated with respect to sodium aluminate and silicate, which react together to form sodalite (3[Na2O⋅Al2O3⋅2SiO2⋅2H2O]⋅Na2CO3) at high temperatures. Heat exchanger tubes are scaled with this compound, which serious...