Synthesis of a non-stoichiometric pyroxene under ambient pressure

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概要

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• Crystallization experiments were carried out on powdered glasses having the composition Di23Es53An24 at temperatures of 1250, 1275, 1300, 1325 and 1350°C. The resulting crystalline phases are clinopyroxenes and a trace of unknown oxide crystals. The pyroxenes grown at 1325 and 1350°C are stoichiometric clinopyroxenes rich in Al and Fe. Those grown at the lower three temperatures are non-stoichiometric clinopyroxenes which are extremely rich in Al and contain only negligibly small amounts of Mg. Non-stoichiometric clinopyroxenes are shown not to be characteristic products of high pressure conditions.

著者

• 奥井 眞人

  SES

• OKUI Masato

  Department of Geosystem Sciences, Nihon University

• MARUMO Fumiyuki

  Department of Geosystem Sciences, Nihon University

• Marumo Fumiyuki

  Department F Geosystem Sciences Nihon University

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