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Onuma, Kosuke, Yagi, Kenzo (1971) The join CaMgSi2O6-Ca2MgSi2O7-CaTiAl2O6 in the system CaO-MgO-Al2O3-TiO2-SiO2 and its bearing on titanpyroxenes. Mineralogical Magazine, 38 (296) 471-480 doi:10.1180/minmag.1971.038.296.09

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Reference TypeJournal (article/letter/editorial)
TitleThe join CaMgSi2O6-Ca2MgSi2O7-CaTiAl2O6 in the system CaO-MgO-Al2O3-TiO2-SiO2 and its bearing on titanpyroxenes
JournalMineralogical Magazine
AuthorsOnuma, KosukeAuthor
Yagi, KenzoAuthor
Year1971 (December)Volume38
Issue296
PublisherMineralogical Society
Download URLhttps://rruff.info/doclib/MinMag/Volume_38/38-296-471.pdf
DOIdoi:10.1180/minmag.1971.038.296.09Search in ResearchGate
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Mindat Ref. ID6505Long-form Identifiermindat:1:5:6505:8
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Full ReferenceOnuma, Kosuke, Yagi, Kenzo (1971) The join CaMgSi2O6-Ca2MgSi2O7-CaTiAl2O6 in the system CaO-MgO-Al2O3-TiO2-SiO2 and its bearing on titanpyroxenes. Mineralogical Magazine, 38 (296) 471-480 doi:10.1180/minmag.1971.038.296.09
Plain TextOnuma, Kosuke, Yagi, Kenzo (1971) The join CaMgSi2O6-Ca2MgSi2O7-CaTiAl2O6 in the system CaO-MgO-Al2O3-TiO2-SiO2 and its bearing on titanpyroxenes. Mineralogical Magazine, 38 (296) 471-480 doi:10.1180/minmag.1971.038.296.09
In(1971, December) Mineralogical Magazine Vol. 38 (296) Mineralogical Society
Abstract/NotesSummaryThe phase equilibrium diagrams of CaMgSi2O6-CaTiAl2O6 with 10, 20, and 30 wt % Ca2MgSi2O7 in the join CaMgSi2O6-Ca2MgSi2O7-CaTiAl2O6 were determined. Six three-phase assemblages, six four-phase assemblages, and two five-phase assemblages (isobaric trivariant, divariant, and univariant) were confirmed. The univariant assemblages are diopsidess+forsterite+åkermanitess + perovskite + liquid and diopsidess+åkermanitess+perovskite+spinel + liquid. Because of the complex solid solutions of diopside and åkermanite the crystallization ceases before invariant assemblages are reached and the final phase assemblage in the diopside-rich region is diopsidess+åkermanitess+perovskite, in the diopside-poor region diopsidess+åkermanitess+perovskite + spinel. Two invariant points, diopsidess+forsterite+åkermanitess+perovskite+spinel+liquid and diopsidess+åkermanitess+anorthite+perovskite+spinel+liquid in the silica-poor region of the system CaO-MgO-Al2O3-TiO2-SiO2 are estimated. The diopside solid solution in this join is discussed with its bearing on the natural titanpyroxenes from alkalic rocks including melilite.

See Also

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Onuma, Kosuke, Akasaka, Masahide (1980) Clinopyroxene with Si < AlIV in the join CaFeAISiO6-CaTiAl2O6. Mineralogical Magazine, 43 (331) 851-856 doi:10.1180/minmag.1980.043.331.05
Akasaka, Masahide, Onuma, Kosuke (1980) The join CaMgSi2O6-CaFeAlSiO6-CaTiAl2O6 and its bearing on the Ti-rich fassaitic pyroxenes. Contributions to Mineralogy and Petrology, 71 (3) 301-312 doi:10.1007/bf00371672
Biggar, G. M., O'Hara, M. J. (1972) Melilite crystallization in the system CaO-MgO-Al2O3-SiO2. Mineralogical Magazine, 38 (300) 918-925 doi:10.1180/minmag.1972.038.300.02
Onuma, Kosuke, Akasaka, Masahide, Yagi, Kenzo (1981) The bearing of the system CaMgSi2O6î—¸CaAl2SiO6î—¸CaFeAlSiO6 on fassaitic pyroxene. Lithos, 14 (3) 173-182 doi:10.1016/0024-4937(81)90039-6
Wyllie, Peter J. (1960) The system CaO-MgO-FeO-SiO2 and its bearing on the origin of ultrabasic and basic rocks. Mineralogical Magazine and Journal of the Mineralogical Society, 32 (249) 459-470 doi:10.1180/minmag.1960.032.249.05
Biggar, G. M. (1985) Calcium-poor pyroxenes: phase relations in the system CaO MgO-Al2O3-SiO2. Mineralogical Magazine, 49 (350) 49-58 doi:10.1180/minmag.1985.049.350.06
Davies, A. (1994) The Thermodynamics of Mineral-Melt Equilibria in the System CaO-MgO-Al2O3-SiO2. Mineralogical Magazine, 58 (1) 213-214 doi:10.1180/minmag.1994.58a.1.113
Matsui, M. (1994) A Transferable Interatomic Potential Model for Crystals and Melts in the System CaO-MgO-Al2O3-SiO2. Mineralogical Magazine, 58 (2) 571-572 doi:10.1180/minmag.1994.58a.2.34
Biggar, G. M., Humphries, D. J. (1981) The plagioclase, forsterite, diopside, liquid equilibrium in the system CaO-Na2O-MgO-Al2O3-SiO2. Mineralogical Magazine, 44 (335) 309-314 doi:10.1180/minmag.1981.044.335.11
Konzett, J. (1994) Phase Relations and Chemistry of Richteritic Amphiboles in the System K2O-Na2O-CaO-MgO-Al2O3-SiO2-H2O (KNCMASH) Mineralogical Magazine, 58 (1) 491-492 doi:10.1180/minmag.1994.58a.1.255
de Vekey, R. C., Majumdar, A. J. (1970) Nucleation and crystallization studies of some glasses in the CaO-MgO-Al2O3-SiO2 system. Mineralogical Magazine, 37 (291) 771-779 doi:10.1180/minmag.1970.037.291.03
 
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