赤外分光法でみる鉱物中の“水”

抄録

“Water” of various chemical forms which occur in hydrous and nominally anhydrous minerals have important roles in properties and behaviors of minerals. Major interests on “water” in minerals are hydrolytic weakening of quartz, promotion of various reaction of mineral under small amounts of “water”, amounts and chemical form of “water” in magma and mantle, the relation between optical anomaly and OH- ordering in minerals, etc. Infrared (IR) spectroscopy is an available method to analyze the chemical form of “water” in minerals. In this review, several topics on the detection of “water” in minerals under IR spectroscopy, such as “water” analysis in naturally deformed and recrystallized quartz, behav-iors of “water” in quartz at low and high temperature, orientation determination of OH dipole in crystal, and IR absorption spectra of brucite under high pressure with diamond anvil, are introduced.