Browsing Геология России by Author "Yamanaka T."

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BONDING CHARACTER OF SIO2 STISHOVITE UNDER HIGH PRESSURES UP TO 30 GPA

Yamanaka T.; Fukuda T.; Mimaki J. (2002)

The charge density and bond character of the rutile-type structure of SiO2 (stishovite) under compression to 30 GPa were investigated by X-ray diffraction study using synchrotron radiation and AgKα rotating anode X-ray ...
ELECTRIC CONDUCTIVITY OF Fe2SiO4–Fe3O4 SPINEL SOLID SOLUTIONS

Yamanaka T.; Shimazu H.; Ota K. (2001)

The spinel solid solution was found to exist in the whole range between Fe3O4 and γ-Fe2SiO4 at over 10 GPa. The resistivity of Fe3− x Si x O4 (0.0<x<0.288) was measured in the temperature range of 80∼300 K by the AC impedance ...
MAGNETIC PROPERTIES OF THE Fe2SiO4–Fe3O4 SPINEL SOLID SOLUTIONS

Yamanaka T.; Okita M. (2001)

Magnetic measurement of Fe3− x Si x O4 spinel solid solutions indicates that their Curie temperatures decrease gradually, but not linearly, from 851 to 12 K with increasing content of nonmagnetic ions Si4+. Magnetic ...
SEQUENTIAL HIGH-PRESSURE TRANSFORMATIONS OF FEGEO3 HIGH-P CLINOPYROXENE (C2/C) AT TEMPERATURES UP TO 365°C

Hattori T.; Tsuchiya T.; Nagai T.; Yamanaka T. (2001)

In order to elucidate high-pressure transformations of high-P clinopyroxene (C2/c) at kinetically low temperature where atoms are not thermally activated, the transformation processes of FeGeO3 clinopyroxene (C2/c) have ...

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