SYNCHROTRON INFRARED ABSORBENCY MEASUREMENTS OF HYDROGEN IN MGSIO3 PEROVSKITE

被引：64

作者：

MEADE, C

REFFNER, JA

ITO, E

机构：

[1] OKAYAMA UNIV,INST STUDY EARTHS INTERIOR,MISASA,TOTTORI 68202,JAPAN

[2] SPECTRA TECH INC,STAMFORD,CT 06906

来源：

SCIENCE | 1994年 / 264卷 / 5165期

关键词：

D O I：

10.1126/science.264.5165.1558

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Micro-infrared spectroscopic measurements on single crystals of MgSiO3 perovskite document two pleochroic hydroxyl absorbance peaks at 3483 and 3423 centimeter(-1). These measurements were obtained with the use of a synchrotron infrared source for spectroscopy. These data are consistent with a trace hydrogen content of 700 +/- 170 hydrogen atoms per 10(6) silicon atoms in the nominally anhydrous MgSiO3 perovskite. When integrated over the volume of the lower mantle, this concentration is comparable to 12 percent of the mass of hydrogen in the Earth's hydrosphere.

引用

页码：1558 / 1560

页数：3

共 27 条

[1] WATER IN EARTHS MANTLE - THE ROLE OF NOMINALLY ANHYDROUS MINERALS [J].