Инд. авторы:	Shatskiy A., Borzdov Y.M., Litasov K.D., Ohtani E., Khokhryakov A.F., Pal'Yanov Y.N., Katsura T.
Заглавие:	Pressless split-sphere apparatus equipped with scaled-up Kawai-cell for mineralogical studies at 10-20 GPa
Библ. ссылка:	Shatskiy A., Borzdov Y.M., Litasov K.D., Ohtani E., Khokhryakov A.F., Pal'Yanov Y.N., Katsura T. Pressless split-sphere apparatus equipped with scaled-up Kawai-cell for mineralogical studies at 10-20 GPa // American Mineralogist. - 2011. - Vol.96. - Iss. 4. - P.541-548. - ISSN 0003-004X. - EISSN 1945-3027.
Внешние системы:	DOI: 10.2138/am.2011.3643; SCOPUS: 2-s2.0-79955084888;
Реферат:	eng: Pressless split-sphere apparatus (BARS) equipped with an 8-6 type multi-anvil system is used extensively for large (6 carats) gem quality diamond crystal growth and various mineralogical and geochemical studies at shallow mantle conditions (P ≤ 7.5 GPa). In this study, we extend the pressure range for this apparatus to the conditions of the Earth's transition zone (P = 20 GPa) using a 6-8 multi-anvil system. A scaled-up Kawai-cell consisting of 47 mm WC cubic anvils with 10 mm truncation and 18 mm MgO pressure medium was employed for the experiments. A 300 mm spherical multi-anvil block compressed by a hydraulic system with 2500 atm capacity was used to compress the Kawai-cell. A pressure of 15.5 GPa was successfully generated at the oil pressure of 1875 atm. The comparison of the BARS apparatus calibrations with those obtained using a uniaxial split-sphere press USSA-5000 suggests that pressure up to 17 and 20 GPa in compressed cell/sample volumes of 1200/60 and 400/18 mm3, respectively, can be generated using a combination of the BARS apparatus and the scaled-up Kawai-cell. This cell volume is much larger than that in conventional multi-anvil systems, which does not exceed 80 mm3 at the same conditions.
Ключевые слова:	mineralogy; mantle structure; high pressure system; experimental apparatus; diamond anvil cell; calibration; Scaled-up Kawai cell; transition zone; Multi-anvil; Kawai-type apparatus; High-pressure apparatus; Earth's mantle; BARS; 6-8 type; Pressless split-sphere apparatus;
Издано:	2011
Физ. характеристика:	с.541-548