The a–b phase transition in volcanic cristobalite
نویسندگان
چکیده
Department of Earth Sciences, Durham University, South Road, Durham DH1 3LE, UK, Institute of Hazard, Risk and Resilience, Durham University, South Road, Durham DH1 3LE, UK, Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, Munich 80333, Germany, Camborne School of Mines, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Penryn TR10 9EZ, UK, Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, UK, and Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK. Correspondence e-mail: [email protected]
منابع مشابه
The α–β phase transition in volcanic cristobalite
Cristobalite is a common mineral in volcanic ash produced from dome-forming eruptions. Assessment of the respiratory hazard posed by volcanic ash requires understanding the nature of the cristobalite it contains. Volcanic cristobalite contains coupled substitutions of Al3+ and Na+ for Si4+; similar co-substitutions in synthetic cristobalite are known to modify the crystal structure, affecting t...
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Volcanic ash is a heterogeneous mineral dust that is typically composed of a mixture of amorphous (glass) and crystalline (mineral) fragments. It commonly contains an abundance of the crystalline silica (SiO2) polymorph cristobalite. Inhalation of crystalline silica can induce inflammation by stimulating the NLRP3 inflammasome, a cytosolic receptor complex that plays a critical role in driving ...
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The Soufrière Hills Volcano (SHV) crystallizes cristobalite (crystalline silica) in its lava domes, and inhalation of cristobaliterich ash may pose a chronic respiratory hazard. We investigate the causes of variation in cristobalite abundance (measured by X-ray diffraction) in ash from dome collapses, explosions and ash venting from 1997 to 2010. Cristobalite abundance in bulk dome-collapse ash...
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The Soufrière Hills Volcano (SHV) crystallizes cristobalite (crystalline silica) in its lava domes, and inhalation of cristobaliterich ash may pose a chronic respiratory hazard. We investigate the causes of variation in cristobalite abundance (measured by X-ray diffraction) in ash from dome collapses, explosions and ash venting from 1997 to 2010. Cristobalite abundance in bulk dome-collapse ash...
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The most abundant rock-forming minerals in the eanh's crust are framework silicates with complex crystal structures. These materials displaya remarkable chemical and structUral diversity. In addition,~structUral phase transitions involving displacive distonions are panicularly common, leading to yet more structural variation. There have been suggestions that the distonive behavior of the framew...
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