High-pressure iron sulfur compound, Fe3S2, and melting relations in the Fe-FeS system

被引：190

作者：

Fei, YW ^{[1
]}

Bertka, CM ^{[1
]}

Finger, LW ^{[1
]}

机构：

[1] CARNEGIE INST WASHINGTON,CTR HIGH PRESSURE RES,WASHINGTON,DC 20015

来源：

SCIENCE | 1997年 / 275卷 / 5306期

关键词：

D O I：

10.1126/science.275.5306.1621

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：

An iron-sulfur compound (Fe3S2) was synthesized at pressures greater than 14 gigapascals in the system Fe-FeS. The formation of Fe3S2 changed the melting relations from a simple binary eutectic system to a binary system with an intermediate compound that melted incongruently. The eutectic temperature in the system at 14 gigapascals was about 400 degrees C lower than that extrapolated from Usselman's data, implying that previous thermal models of Fe-rich planetary cores could overestimate core temperature. If it is found in a meteorite, the Fe3S2 phase could also be used to infer the minimum size of a parent body.

引用

页码：1621 / 1623

页数：3

共 21 条

[1]

BERTKA CM, IN PRESS J GEOPHYS R

[2] DENSITY + COMPOSITION OF MANTLE + CORE [J].

BIRCH, F .

JOURNAL OF GEOPHYSICAL RESEARCH, 1964, 69 (20) :4377-+

[3] MELTING OF THE FE-FEO AND THE FE-FES SYSTEMS AT HIGH-PRESSURE - CONSTRAINTS ON CORE TEMPERATURES [J].

BOEHLER, R .

EARTH AND PLANETARY SCIENCE LETTERS, 1992, 111 (2-4) :217-227

[4] MELTING RELATIONS IN FE-RICH PORTION OF SYSTEM FE-FES AT 30-KB PRESSURE [J].

BRETT, R ;

BELL, PM .

EARTH AND PLANETARY SCIENCE LETTERS, 1969, 6 (06) :479-&

[5] HUGONIOT DATA FOR PYRRHOTITE AND THE EARTHS CORE [J].

BROWN, JM ;

AHRENS, TJ ;

SHAMPINE, DL .

JOURNAL OF GEOPHYSICAL RESEARCH, 1984, 89 (NB7) :6041-6048

[6] ACQUISITION OF POWDER DIFFRACTION DATA WITH SYNCHROTRON RADIATION [J].

COX, DE ;

TOBY, BH ;

EDDY, MM .

AUSTRALIAN JOURNAL OF PHYSICS, 1988, 41 (02) :117-131

[7] STRUCTURE AND DENSITY OF FES AT HIGH-PRESSURE AND HIGH-TEMPERATURE AND THE INTERNAL STRUCTURE OF MARS [J].

FEI, YW ;

PREWITT, CT ;

MAO, HK ;

BERTKA, CM .

SCIENCE, 1995, 268 (5219) :1892-1894

[8]

FLEET ME, 1977, AM MINERAL, V62, P341

[9]

Hansen M., 1958, CONSTITUTION BINARY, P704

[10] THE NI-S SYSTEM AND RELATED MINERALS [J].

KULLERUD, G ;

YUND, RA .

JOURNAL OF PETROLOGY, 1962, 3 (01) :126-175

← 1 2 3 →