搜索结果: 1-15 共查到“凹凸棒石 Alkaline”相关记录17条 . 查询时间(0.083 秒)
Study of Catalytic Hydrolysis of Alkaline NaBH4 Solution by Ru/Ni Foam Catalyst
Catalyst Chemical Hydride Hydrogen Generation Sodium Borohydride
2011/11/22
A Ni metal form was used to carry the Ru catalyst to induce the hydrogen gas from the NaBH4 solution. Results show the Ni material was replaced by Ru material. Ru has been coating twice or more to cov...
Notes on ephesite,terskite,Na-komarovite,ceriopyrochlore-(Ce),joaquinite-(Ce) and other minerals from the Ilimaussaq alkaline complex,South Greenland
agpaite ephesite Ilimaussaq Na-komarovite nepheline syenites terskite
2011/11/8
Notes on ephesite,terskite,Na-komarovite,ceriopyrochlore-(Ce),joaquinite-(Ce) and other minerals from the Ilimaussaq alkaline complex,South Greenland.
Occurrence of Clinoptilolite and Mordenite in Tertiary Calc-Alkaline Pyroclastites from Sardinia (Italy)
Clinoptilolite Fluid/Rock Interaction Mordenite Opal-CT Tertiary Pyroclastic Flows
2011/12/7
Abstract: Clinoptilolite and mordenite occur as diagenetic products of medium-grained, moderately welded and poorly sorted pyroclastic flows belonging to the Tertiary calc-alkaline volcanism of Sardin...
Melt viscosities in the system Na-Fe-Si-O-F-Cl: Contrasting effects of F and Cl in alkaline melts
Melt viscosities Na-Fe-Si-O-F-Cl alkaline melts
2012/4/1
The shear viscosities of melts in the system Na-Fe-Si-O-F-Cl were determined over a wide range of temperatures (400–1200 8 C) at 1 atm pressure in air. The compositions are based on the addition of Fe...
Conversion of Ferruginous Allophanes to Ferruginous Beidellites at 95 癈 Under Alkaline Conditions with Alternating Oxidation and Reduction
Allophane Beidellite Infrared Spectra Nontronite Vertisols X-ray Diffraction (XRD)
2011/12/22
Abstract: Ferruginous beidellites with Al:Fe atomic ratios up to 2.36 were obtained when solutions containing Al, Fe2+ and H4SiO4 were adjusted to pH 8.5 with Ca(OH)2 and incubated at 95 癈 in the pres...
Epidote in calc-alkaline magmas: An experimental study of stability, phase relationships, and the role of epidote in magmatic evolution
Epidote calc-alkaline magmas stability phase relationships the role of epidote magmatic evolution
2012/4/5
Experiments on tonalite and granodiorite wereperformed at conditions ranging from 2.1 to 18kbar and 550 to 850°C to establish the magmatic stability field ofepidote as a function ofP, T,and f02. Atwat...
The Use of Color to Quantify the Effects of pH and Temperature on the Crystallization Kinetics of Goethite Under Highly Alkaline Conditions
Color Colorimetry Crystallization Goethite Hematite Kinetics L*a*b* color space
2011/12/28
The crystallization kinetics of goethite were studied colorimetrically under highly alkaline conditions (pH 10.1–12.2) at temperatures from 40° to 85°C. Color changes during crystallization from fresh...
Electrophoretic Behavior of Imogolite Under Alkaline Conditions
Electrophoresis Imogolite Mobility PZC PZNC Viscosity
2011/12/31
Electrophoretic mobility of imogolite has been reported as positive (migration toward the negative electrode) below pH 9, and zero above pH 9. However, when mobility of dilute imogolite suspensions (5...
Influence of Fe(II) on the Formation of the Spinel Iron Oxide in Alkaline Medium
Dissolution Ferrihydrite Maghemite Magnetite Mossbauer spectroscopy
2011/12/31
Fe(II) and Fe(III) in various proportions were coprecipitated by NH3 at pH ≈ 11. The Fe(II)/Fe(III) ratio (x) was varied from 0.10 to 0.50. After stabilization by aging at pH ≃ 8 in anaerobic co...
Effect of Cobalt on the Formation of Crystalline Iron Oxides from Ferrihydrite in Alkaline Media
Cobalt Crystal growth Ferrihydrite Goethite Spinel Transmission electron microscopy
2011/11/30
Abstract: At pH 12 Co-ferrihydrite transformed to either Co-goethite or Co-magnetite, the latter compound appearing at Co additions of > 18 mole %. Although Co was readily taken up by the magnetite st...
Phillipsite from Silicic Tuffs in Saline, Alkaline-Lake Deposits
Alkaline lake deposit Chemical composition Phillipsite Tuff Unit-cell parameters X-ray powder diffraction Zeolite
2012/1/5
Phillipsite is a common constituent in diagenetically altered rhyolitic vitric tufts of Cenozoic saline, alkaline-lake deposits where it occurs as spherulites or aggregates of prismatic crystals. This...
Transformation of Hausmannite into Birnessite in Alkaline Media
Alkaline solution Birnessite Dissolution Hausmannite Manganese Synthesis
2012/1/9
The transformation of hausmannite (Mn3O4) into a K-bearing, 7-A phyllomanganate (K-birnessite) in KOH was followed using X-ray powder diffraction and transmission electron microscopy. The transformati...
Effect of Silicate Species on the Transformation of Ferrihydrite into Goethite and Hematite in Alkaline Media
Ferrihydrite Goethite Hematite Morphology Silicate Transmission electron microscopy
2011/11/25
Abstract: The transformation of ferrihydrite to goethite and/or hematite in alkaline media is strongly retarded by the presence of silicate species. These species probably stabilize ferrihydrite by ad...
Effect of Manganese on the Transformation of Ferrihydrite into Goethite and Jacobsite in Alkaline Media
Ferrihydrite Goethite Jacobsite Manganese Phyllomanganate Synthesis Transmission electron microscopy
2011/11/25
Abstract: In the presence of Mn(II), ferrihydrite transforms into Mn-goethite and/or jacobsite. Chemical analysis showed that as much as 15 mole % Mn replaced Fe in the goethite structure. If Mn(III) ...
Palygorskite and Sepiolite Alteration to Smectite Under Alkaline Conditions
Alteration Analcime Cation-exchange capacity Palygorskite Sepiolite Smectite Sodium hydroxide
2011/11/25
Abstract: The instability of palygorskite and sepiolite under soil conditions was investigated to determine if these fibrous minerals transform directly to smectite under laboratory conditions. The tr...