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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy >
Vol.XXIII, No.3 >
An Experimental Study of SiO2 Solubility in Hausmannite
| Title: | An Experimental Study of SiO2 Solubility in Hausmannite |
| Authors: | Kikuchi, Takeshi Browse this author | | Sato, Hiroaki Browse this author | | Miura, Hiroyuki Browse this author →KAKEN DB |
| Issue Date: | Mar-1994 |
| Publisher: | 北海道大学 |
| Journal Title: | 北海道大学理学部紀要 |
| Journal Title(alt): | Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy |
| Volume: | 23 |
| Issue: | 3 |
| Start Page: | 321 |
| End Page: | 328 |
| Abstract: | Solid solubility of SiO2 component in hausmannite has been experimentally determined. The solid solubility of hausmannite coexisting with rhodonite in air at 1200℃ determined by microprobe analyses is the atomic ratio Si/(Mn+Si) of 0.015(2). Reaction between hausmannite and quartz at 900℃ under hematite-magnetite buffer was not attained in equilibrium. Metastable Mn3O4-SiO2 solid solutions have been synthesized in air at 60℃ by a coprecipitation method. The atomic ratio Si/(Mn+Si) is achieved to about 0.025 by this way. It is indicated that the increase of Si content in hausmannite decreases the lattice parameter c and increases a slightly. Concentrations of constituent ions and cation vacancy in hausmannite have been calculated as a function of Po2 and temperature by using a defect chemical equilibrium relations. Possibility to finding the natural hausmannite which is supersaturated with SiO2 is suggested. |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/36786 |
| Appears in Collections: | Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy > Vol.XXIII, No.3
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