High-pressure and high-temperature stability of MgCO3 magnesite was investigated using a lever and spring type of diamond anvil cell up to 55GPa at about 1300°C. No phase transformation was observed in magnesite at the pressures investigated. Magnesite would be a dominant carbon-reservoir in the lower mantle. The volume of magnesite at 55GPa is 77% of that at the atmospheric pressure. The compressibility in the c-axis is 8% larger than that in the a-axis.
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机译：使用杠杆和弹簧类型的金刚石砧座电池在约1300℃下进行研究，研究了MGCO 3 菱镁矿的高压和高温稳定性。在调查的压力下，在菱镁矿中没有观察到相变化。菱镁矿将是下部地幔中的主要碳储层。在55gPa处的菱镁矿体积为大气压的77％。 c -XIS中的可压缩性比 A -XIS中的压缩性为8％。
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