High-pressure synthesis of diamond from graphite and Fe2SiO4

Authors
Suito, K Namba, J Tsutsui, Y Onodera, A
Citation
K. Suito et al., High-pressure synthesis of diamond from graphite and Fe2SiO4, P JPN AC B, 75(3), 1999, pp. 43-45
Citations number
12
Categorie Soggetti
Multidisciplinary
Journal title
PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES
ISSN journal
03862208 → ACNP
Volume
75
Issue
3
Year of publication
1999
Pages
43 - 45
Database
ISI
SICI code
0386-2208(199903)75:3<43:HSODFG>2.0.ZU;2-7
Abstract
A mixture of graphite and Fe2SiO4 in a ratio 2:3 by weight has been studied under pressures from 6 to 10 GPa and temperatures between 1000 and 1960 de grees C using an octahedral-anvil apparatus. At 8 GPa, diamond with a size similar to 10 mu m across was found to be formed at temperatures higher tha n 1900 degrees C. This threshold temperature is by 150 degrees C higher tha n the melting temperature of Fe2SiO4 at this pressure. The result offers a clue to the genesis of diamond in the deep interior of the earth.