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1996•JOURNAL OF MINERALOGY PETROLOGY AND ECONOMIC GEOLOGYOpen access

Synthesis of high-TiO2 pyrope-grossular garnet at 10 GPa.

Kimiyasu Sato, Kosuke Onuma, Eiji Ohtani, Takumi Kato

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Abstract

A high-titanium containing garnet, SiO2(40.6), TiO2(6.3), Al2O3(18.8), MgO(14.3), CaO(20.21), (wt%) has been synthesized at 10 GPa and 1500°C. Unit cell parameter of this synthetic garnet is determined to be 11.812 Å by micro-focused X-ray diffractmetry and this value is intermediate between those of pyrope and grossular. These results indicate that pyrope-grossular garnet potentially can accommodate TiO2 up to 6.3 wt% at the high of 10 GPa.

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A high-titanium containing garnet, SiO2(40.6), TiO2(6.3), Al2O3(18.8), MgO(14.3), CaO(20.21), (wt%) has been synthesized at 10 GPa and 1500°C. Unit cell parameter of this synthetic garnet is determined to be 11.812 Å by micro-focused X-ray diffractmetry and this value is intermediate between those of pyrope and grossular. These results indicate that pyrope-grossular garnet potentially can accommodate TiO2 up to 6.3 wt% at the high of 10 GPa.

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Available abstract

A high-titanium containing garnet, SiO2(40.6), TiO2(6.3), Al2O3(18.8), MgO(14.3), CaO(20.21), (wt%) has been synthesized at 10 GPa and 1500°C. Unit cell parameter of this synthetic garnet is determined to be 11.812 Å by micro-focused X-ray diffractmetry and this value is intermediate between those of pyrope and grossular. These results indicate that pyrope-grossular garnet potentially can accommodate TiO2 up to 6.3 wt% at the high of 10 GPa.

Key concepts: Pyrope, Grossular, Almandine, Geology, Mineralogy, Materials science, Geochemistry, Metamorphic rock

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