第97回ジオダイナミクスセミナー
　 　Geodynamics　Seminar

要　旨
　Phosphorus (P5+) is a peculiar element since it can form its own minerals (phosphates), it can replace silicon in silicate minerals, and, in reduced environments (e.g. iron or stony-iron meteorites), it can occur as phosphides. At the Earth's surface, besides phosphate minerals, organic forms of phosphorus are encountered. Phosphorus is essential for life and, frequently, its abundance can limit biological productivity.I 'd like to show that, although phosphorus is a minor element in most parts of the Earth, its contrasted behavior can be used to constrain petrological and geochemical processes at various levels of the Earth. However, many fundamental physical and chemical properties are still lacking for this element and its compounds (e.g. thermochemical property, diffusion kinetics, melting temperature, solubility, high-pressure and high-temperature behavior). Recent progress made in that direction will be outlined.



　　　　　　　　問い合わせ先：山崎　大輔 　TEL　　　（089）927-8408
　　　 　　　　　　　　　　　　　　　　E-mail　　yamazaki@sci.ehime-u.ac.jp