Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-28T04:04:02.595Z Has data issue: false hasContentIssue false
  • English
  • Français

Synthesis of K2SiSi3O9 with silicon in 4- and 6-coordination

Published online by Cambridge University Press:  05 July 2018

N. Kinomura ,
S. Kume  and
M. Koizumi
N. Kinomura
Affiliation:
College of General Education and Institute of Scientific and Industrial Research, Osaka University, Toyonaka, 560, Japan
S. Kume
Affiliation:
College of General Education and Institute of Scientific and Industrial Research, Osaka University, Toyonaka, 560, Japan
M. Koizumi
Affiliation:
College of General Education and Institute of Scientific and Industrial Research, Osaka University, Toyonaka, 560, Japan
Get access Rights & Permissions [Opens in a new window]

Summary

Two kinds of vitreous material with composition K2GeSi3O9 and K2Si4O9 were treated under conditions of high temperature and pressure. The X-ray diffraction patterns of the products were similar to that of K2TiSi3O9, which has the wadeite, K2ZrSi3O9, structure.

A natural crystal of K-feldspar was also treated under the same conditions. The product was found to consist of three phases, coesite, kyanite, and the above-mentioned K2Si4O9. Since Zr ions in wadeite are in a 6-coordinated site, one-quarter of Si ions in K2Si4O9 are considered to be in 6-coordination. This is the first silicate in which Si ions occupy sites of 4- and 6-coordinations in one crystal at the same time.

Type
Research Article
Information
Mineralogical Magazine , Volume 40 , Issue 312 , December 1975 , pp. 401 - 404
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1975

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Cholset, (J.), Deschanvres, (A.), and Raveau, (B.), 1973. Journ. Solid State Chem. 7, 408-17.Google Scholar
Goranson, (R. W.) and Kracek, (F. C.), 1932. Journ. Phys. Chem. 36, 913-26.CrossRefGoogle Scholar
Tlenshaw, (D. E.), 1955. Min. Mag. 30, 585-95.Google Scholar
Osugi, (J.), Shimizu, (K.), Inoue, (K.), and Yasunami, (K.), 1964. Rev. Phys. Chem. Japan, 34, 103-8.Google Scholar
Roy, (R.) and Tuxtle, (O. F.), 1956. Physics and Chemistry of the Earth, 1, 143 (ed. Ahrens et al., Pergamon Press, London).Google Scholar
Schweinsberg, (Von H.) and Liebeau, (F.), 1972. Zeit. anorg, allg. Chem. 387, 241-51.CrossRefGoogle Scholar
Seki, (Y.) and Kennedy, (G. C.), 1964. Amer. Min. 49, 1688-1706.Google Scholar
[Stishov, (S. M.) and Popova, (S. V.)] CtиШob|(C. M.) и Пoпoba, (C. B.), 1961. гeoxиMия (Geokhimiya), 10, 837-9.Google Scholar
Yanagisawa, (Y.) and Kume, (S.), 1973. Mater. Res. Bull. 8, 1241-6.CrossRefGoogle Scholar