Compressibility of phase A, Mg7Si2H6O14 up to 11.2 GPa
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Accession number;04A0260213
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| Title;Compressibility of phase A, Mg7Si2H6O14 up to 11.2 GPa |
| Author;
KURIBAYASHI T
(Tohoku Univ., Sendai, Jpn)
KUDOH Y
(Tohoku Univ., Sendai, Jpn)
KAGI H
(Univ. Tokyo, Jpn)
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Journal Title;J Mineral Petrol Sci
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Journal Code:G0150B
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ISSN:1345-6296
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VOL.98;NO.6;PAGE.215-234(2003)
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| Figure&Table&Reference;FIG.6, TBL.9, REF.33 |
| Pub. Country;Japan |
| Language;English |
| Abstract;A single crystal high-pressure X-ray diffraction study of phase A was performed using a diamond anvil cell up to 11.2 GPa at ambient temperature. The chemical formula of this sample, determined by EPMA from an average of 18 data points, was Mg6.99Si1.99H6.06O14. Axial linear compressibilities of phase A were .BETA.a=2.92(2) and .BETA.c=2.17(3) (*10-3/GPa). The isothermal bulk modulus, calculated using the Birch-Mumaghan equation of state, was KTO=105(4) GPa with a pressure derivative K'=3.9(8) and V0=512.2(6) .ANGS.3. The bulk modulus correlates with the summation of the filling factor of the tetrahedral site and the octahedral site, as shown for the minerals on the forsterite-brucite join in the system MgO-SiO2-H2O. (author abst.) |
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