Artikel
Lizenziert
Nicht lizenziert
Erfordert eine Authentifizierung
Physio-chemical properties of gamma-irradiated vermiculite and their significance for radiation protection and thermoluminescence
-
Sukhnandan Kaur
,
Surinder Singh
Veröffentlicht/Copyright:
14. Oktober 2014
Abstract
The present work reports the effects of g irradiation on vermiculite for the first time. The radiation-induced changes of vermiculite were studied using different techniques viz. ultravioletvisible spectroscopy (UV-Vis), dielectric measurements, X‑ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermoluminescence (TL). In UV-Vis analysis, the Cody model was employed to calculate structural disorder from Urbach energy, which explained the variation of the optical band gap (direct and indirect) with different (1-2000 kGy) γ doses. XRD analysis of the pristine and irradiated samples shows that the crystallinity improved upon irradiation at g dose up to 1000 kGy and deteriorated on further increase of the g dose. A significant change was observed in the dielectric properties after γ irradiation. Data shows that ac conductivity is proportional to the nth power of frequency (fn) in pristine and irradiated vermiculite, with a slope n ranging between 0.52 and 0.76, which indicates that electronic conduction takes place through an electron hopping process. No appreciable changes in characteristic bands (FTIR) have been observed after irradiation, indicating that natural vermiculite is chemically stable. A well-defined TL peak around 132 °C and enhancement in its intensity with g dose (1-1000 kGy) make vermiculite a perfect thermoluminescence dosimeter and indicates usefulness applications in radiation dosimetry.
Keywords: Natural vermiculite; gamma irradiation; optical properties; dielectric properties; XRD; FTIR; thermoluminescence
Received: 2014-1-10
Accepted: 2014-4-21
Published Online: 2014-10-14
Published in Print: 2014-10-1
© 2014 by Walter de Gruyter Berlin/Boston
Sie haben derzeit keinen Zugang zu diesem Inhalt.
Sie haben derzeit keinen Zugang zu diesem Inhalt.
Artikel in diesem Heft
- Highlights and Breakthroughs. Pauling’s rules, in a world of non-spherical atoms
- Highlights and Breakthroughs. Theoretical and applied implications of the structural order of irradiated vermiculite
- Highlights and Breakthroughs. An examination of the Ti-in-quartz thermobarometer in rocks that contain dynamically recrystallized quartz: Re-equilibration of [Ti] during recrystallization
- The Second Conference on the Lunar Highlands Crust and New Directions. Visible-infrared spectral properties of iron-bearing aluminate spinel under lunar-like redox conditions
- The Second Conference on the Lunar Highlands Crust and New Directions. VNIR spectral variability of the igneous stratified Stillwater Complex: A tool to map lunar highlands
- The Second Conference on the Lunar Highlands Crust and New Directions. Spinel-rich lithologies in the lunar highland crust: Linking lunar samples with crystallization experiments and remote sensing
- The Second Conference on the Lunar Highlands Crust and New Directions. Phosphate-halogen metasomatism of lunar granulite 79215: Impact-induced fractionation of volatiles and incompatible elements
- The Second Conference on the Lunar Highlands Crust and New Directions. Reflectance spectroscopy of plagioclase-dominated mineral mixtures: Implications for characterizing lunar anorthosites remotely
- The Second Conference on the Lunar Highlands Crust and New Directions. The distribution of Mg-spinel across the Moon and constraints on crustal origin
- The occurrence and composition of chevkinite-(Ce) and perrierite-(Ce) in tholeiitic intrusive rocks and lunar mare basalt
- Garnet as a major carrier of the Y and REE in the granitic rocks: An example from the layered anorogenic granite in the Brno Batholith, Czech Republic
- Mid-infrared optical constants of clinopyroxene and orthoclase derived from oriented single-crystal reflectance spectra
- Time-resolved synchrotron X-ray diffraction study of the dehydration behavior of chalcophanite
- Ab initio investigations of dioctahedral interlayer-deficient mica: Modeling particles of illite found within gas shale
- Trona at extreme conditions: A pollutant-sequestering material at high pressures and low temperatures
- In-situ U-Th/Pb geochronology of (urano)thorite
- Temperature-induced amorphization of Na-zeolite A: A view from multi-nuclear high-resolution solid-state NMR
- “Silicified” pyrochlore from nepheline syenite (mariupolite) of the Mariupol Massif, SE Ukraine: A new insight into the role of silicon in the pyrochlore structure
- Physio-chemical properties of gamma-irradiated vermiculite and their significance for radiation protection and thermoluminescence
- Ti resetting in quartz during dynamic recrystallization: Mechanisms and significance
- Thermodynamic study of monoclinic pyrrhotite in equilibrium with pyrite in the Ag-Fe-S system by solid-state electrochemical cell technique
- Phase diagram and P-V-T equation of state of Al-bearing seifertite at lowermost mantle conditions
- Crystal structure of Guinier-Preston zones in orthopyroxene: Z-contrast imaging and ab inito study
- Crystal chemistry and surface configurations of two polylithionite-1M crystals
- Crystal chemistry of synthetic Ti-Mg-bearing hibonites: A single-crystal X-ray study
- Mineralogy and crystal chemistry of Mn, Fe, Co, Ni, and Cu in a deep-sea Pacific polymetallic nodule
- Agakhanovite-(Y), ideally (YCa)⃞2KBe3Si12O30, a new milarite-group mineral from the Heftetjern pegmatite, Tørdal, Southern Norway: Description and crystal structure
- Actinides in Geology, Energy, and the Environment. Ichnusaite, Th(MoO4)2·3H2O, the first natural thorium molybdate: Occurrence, description, and crystal structure
- Actinides in Geology, Energy, and the Environment. Quantification of α-particle radiation damage in zircon
- What Lurks in the Martian Rocks and Soil? Investigations of Sulfates, Phosphates, and Perchlorates. Spectral properties of Ca-sulfates: Gypsum, bassanite, and anhydrite
- What Lurks in the Martian Rocks and Soil? Investigations of Sulfates, Phosphates, and Perchlorates. Flower-like apatite recording microbial processes through deep geological time and its implication to the search for mineral records of life on Mars
- What Lurks in the martian Rocks and Soil? Investigations of Sulfates, Phosphates, and Perchlorates. Gypsum in modern Kamchatka volcanic hot springs and the Lower Cambrian black shale: Applied to the microbial-mediated precipitation of sulfates on Mars
- Letter. Identification of hydrogen defects linked to boron substitution in synthetic forsterite and natural olivine
- Letter. Densified glasses as structural proxies for high-pressure melts: Configurational compressibility of silicate melts retained in quenched and decompressed glasses
- Letter. Geobarometry from host-inclusion systems: The role of elastic relaxation
- New Mineral Names
- Book Review
Schlagwörter für diesen Artikel
Natural vermiculite;
gamma irradiation;
optical properties;
dielectric properties;
XRD;
FTIR;
thermoluminescence
Artikel in diesem Heft
- Highlights and Breakthroughs. Pauling’s rules, in a world of non-spherical atoms
- Highlights and Breakthroughs. Theoretical and applied implications of the structural order of irradiated vermiculite
- Highlights and Breakthroughs. An examination of the Ti-in-quartz thermobarometer in rocks that contain dynamically recrystallized quartz: Re-equilibration of [Ti] during recrystallization
- The Second Conference on the Lunar Highlands Crust and New Directions. Visible-infrared spectral properties of iron-bearing aluminate spinel under lunar-like redox conditions
- The Second Conference on the Lunar Highlands Crust and New Directions. VNIR spectral variability of the igneous stratified Stillwater Complex: A tool to map lunar highlands
- The Second Conference on the Lunar Highlands Crust and New Directions. Spinel-rich lithologies in the lunar highland crust: Linking lunar samples with crystallization experiments and remote sensing
- The Second Conference on the Lunar Highlands Crust and New Directions. Phosphate-halogen metasomatism of lunar granulite 79215: Impact-induced fractionation of volatiles and incompatible elements
- The Second Conference on the Lunar Highlands Crust and New Directions. Reflectance spectroscopy of plagioclase-dominated mineral mixtures: Implications for characterizing lunar anorthosites remotely
- The Second Conference on the Lunar Highlands Crust and New Directions. The distribution of Mg-spinel across the Moon and constraints on crustal origin
- The occurrence and composition of chevkinite-(Ce) and perrierite-(Ce) in tholeiitic intrusive rocks and lunar mare basalt
- Garnet as a major carrier of the Y and REE in the granitic rocks: An example from the layered anorogenic granite in the Brno Batholith, Czech Republic
- Mid-infrared optical constants of clinopyroxene and orthoclase derived from oriented single-crystal reflectance spectra
- Time-resolved synchrotron X-ray diffraction study of the dehydration behavior of chalcophanite
- Ab initio investigations of dioctahedral interlayer-deficient mica: Modeling particles of illite found within gas shale
- Trona at extreme conditions: A pollutant-sequestering material at high pressures and low temperatures
- In-situ U-Th/Pb geochronology of (urano)thorite
- Temperature-induced amorphization of Na-zeolite A: A view from multi-nuclear high-resolution solid-state NMR
- “Silicified” pyrochlore from nepheline syenite (mariupolite) of the Mariupol Massif, SE Ukraine: A new insight into the role of silicon in the pyrochlore structure
- Physio-chemical properties of gamma-irradiated vermiculite and their significance for radiation protection and thermoluminescence
- Ti resetting in quartz during dynamic recrystallization: Mechanisms and significance
- Thermodynamic study of monoclinic pyrrhotite in equilibrium with pyrite in the Ag-Fe-S system by solid-state electrochemical cell technique
- Phase diagram and P-V-T equation of state of Al-bearing seifertite at lowermost mantle conditions
- Crystal structure of Guinier-Preston zones in orthopyroxene: Z-contrast imaging and ab inito study
- Crystal chemistry and surface configurations of two polylithionite-1M crystals
- Crystal chemistry of synthetic Ti-Mg-bearing hibonites: A single-crystal X-ray study
- Mineralogy and crystal chemistry of Mn, Fe, Co, Ni, and Cu in a deep-sea Pacific polymetallic nodule
- Agakhanovite-(Y), ideally (YCa)⃞2KBe3Si12O30, a new milarite-group mineral from the Heftetjern pegmatite, Tørdal, Southern Norway: Description and crystal structure
- Actinides in Geology, Energy, and the Environment. Ichnusaite, Th(MoO4)2·3H2O, the first natural thorium molybdate: Occurrence, description, and crystal structure
- Actinides in Geology, Energy, and the Environment. Quantification of α-particle radiation damage in zircon
- What Lurks in the Martian Rocks and Soil? Investigations of Sulfates, Phosphates, and Perchlorates. Spectral properties of Ca-sulfates: Gypsum, bassanite, and anhydrite
- What Lurks in the Martian Rocks and Soil? Investigations of Sulfates, Phosphates, and Perchlorates. Flower-like apatite recording microbial processes through deep geological time and its implication to the search for mineral records of life on Mars
- What Lurks in the martian Rocks and Soil? Investigations of Sulfates, Phosphates, and Perchlorates. Gypsum in modern Kamchatka volcanic hot springs and the Lower Cambrian black shale: Applied to the microbial-mediated precipitation of sulfates on Mars
- Letter. Identification of hydrogen defects linked to boron substitution in synthetic forsterite and natural olivine
- Letter. Densified glasses as structural proxies for high-pressure melts: Configurational compressibility of silicate melts retained in quenched and decompressed glasses
- Letter. Geobarometry from host-inclusion systems: The role of elastic relaxation
- New Mineral Names
- Book Review
