Stable mineral colloids play a role in the mobilization of actinide contaminants in the environment. In this paper we present a method to isolate and identify colloids released from high surface area sorbents associated with a proposed clay mineral barrier in a nuclear waste repository. The mine...

Clay stabilizer is the topic of a great number of studies, particularly in petroleum engineering. The organic cationic polymer is a kind of clay stabilizer with excellent anti-swelling effect. However, for tight reservoirs, the organic cationic polymer type clay stabilizers tend to increase the ...

From pottery to clay tablets and building materials, clay easily qualifies as one of the most versatile materials in the history of human civilization. Clay owes this versatility to the distinct properties it exhibits before and after firing. Soft, unfired clay can morph into complex shapes, whi...

Surface plasmon resonance was employed for the in-situ investigation of film formation from aqueous dispersions of clay minerals on gold/water interface. High charge (SAz-1) and intermediate charge smectite (STx-1b) were studied for their ability to form stable clay films on gold surfaces and th...

The magnetic properties of the ferrimagnetic chiolithe-type phases Na5V3F14, Na5Fe3F14, Na5Fe2CoF14, Na5Co3F14 have been investigated. Explaination of the obtained results have been proposed.

New data suggest the following chemical peculiarities of lazurite: 1.1. The cell (cubic, a=9Å) formula can be expressed as (R′,R′′)7,5–8(Si,Al)12(O,S)24(SO4,H2O,Cl)a·nH2O; R′ signifies monovalent ions, chiefly Na; R′′ signifies divalent ions, essentially Ca.2.2. Si exceeds Al by 0.1 to ...

Lazurite, the blue mineral found in lapis lazuli, may be a marker for the identification of provenance. Sulfur K-edge X-ray absorption near edge structure spectroscopy (XANES) of lazurite from lapis lazuli of various locations, such as Afghanistan, Russia, Chile, the USA, Iran, Tajikistan, and M...

Lightweight and high-strength hybrids are of great importance for reducing material and energy consumptions. Glass fiber-reinforced polyphenylene sulfide (PPS) and aluminum (Al) alloy 6061 were joined via flexible injection molding technology. With pretreatments of anodizing and the coupling age...

The corrosion behaviour of aluminium alloy AlSi7Mg0.3 in artificial sea water with added 0, 20, 50 and 100 ppm of Na2S was investigated over the course of immersion of 42 days. Samples were taken at various times and their electrochemical and microstructural properties characterized. The corrosi...

Graphene oxide based electrode materials show remarkable electrochemical properties due to the improved specific surface area and electrical conductivity for supercapacitor applications. Hydrothermally synthesized graphene oxide based aluminum sulfide nanowalls on nickel foam (NF) have revealed ...

Sapphirine, spinel, orthoamphibole ± quartz and kyanite are included in porphyroblastic garnet in biotitic gneiss enclosed in a lens of metamorphosed ultramafic rocks in the Cambrian granulite-facies metamorphic complex of the eastern Sør Rondane Mountains, Queen Maud Land, East Antarctica. A b...

In this study, we report the first discovery of microdiamond inclusions in kyanite–garnet schists from the Central Rhodope Mountains in Bulgaria. These inclusions occur in garnets from metapelites that are part of a meta-igneous and meta-sedimentary mélange hosted by Variscan (Hercynian) ortho...

Manganese is a very important microelement performing a large number of biological functions in human body. We have detected by spectroscopic measurements manganese in mineral kyanite. In this paper we present laser-induced time-resolved luminescence and optical absorbance spectra of orange, Mn ...

A new approach has been developed for preparing microporous mullite ceramics based on kyanite obtained by foaming with aluminate cement as the gel-former. By using this method, foams in slurries are effectively stabilized, microporous mullite ceramics with high open porosity (53–77.3%), high co...

The thermal equation of state of a natural kyanite has been investigated with a DIA-type, cubic-anvil apparatus (SAM85) combined with an energy-dispersive synchrotron X-ray radiation technique up to 8.55 GPa and 1273 K. No phase transition was observed in the studied pressure-temperature (P-T) r...

In this paper, we present high-resolution friction force microscopy (FFM) images of the (100) face of kyanite (Al2SiO5) immersed in water. These images show an almost rectangular lattice presumably defined by the protruding oxygen of AlO6 polyhedra. Surface lattice parameters measured on two-dim...

Diamond- and kyanite-bearing eclogites from the Lace kimberlite on the Kaapvaal craton have common picritic to gabbroic oceanic protoliths with bimineralic eclogites, lying on arrays of Eu∗ and ∑REE that are consistent with accumulation and fractionation of plagioclase and olivine. However, the...

Heterogeneous, modally banded kyanite-bearing and bimineralic eclogites from the lithospheric mantle, collected at the Roberts Victor Diamond mine (South Africa), show a reaction texture in which kyanite is consumed. Geothermobarometric calculations using measured mineral compositions in Perple_...

Kyanite, mullite and model kyanite ore carbochlorination processing was investigated in laboratory experiments and thermodynamics' calculations. The extraction of 94% alumina and silica takes place as a result of calcined kyanite carbochlorination at 1300 °C for 90 min at normal pressure. ...

An effective separation of kyanite from quartz by flotation is a challenge due to their similar surface properties and surface activation by metal ions. This study investigated the effect of pH, Fe3+ and sodium silicate on the separation of kyanite from quartz using anionic collector, sodium pet...