New silicate perovskites
New silicate perovskites
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新型硅酸盐钙钛矿
DOI：
10.1029/gl014i011p01079
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发表时间：
1987
影响因子：
5.2
通讯作者：
Lin‐gun Liu
中科院分区：
文献类型：
--
作者：
Lin‐gun Liu
The previously reported non-quenchable phases of the compositions of diopside and omphacite, or the diopside-II phase, have been observed to crystallize in the cubic perovskite structure at pressures greater than ∼230 kbar and at ∼1000°C by in situ experiments using a gasketed diamond-anvil cell coupled with laser heating. The lattice parameter for the perovskite phase of (Ca0.5Mg0.5)SiO3 is a = 3.437 ± 0.004A and that of ½ (0.75CaMgSi2O6·0.25NaAlSi2O6) a = 3.492 ± 0.004A at pressure range 230-245 kbar and room temperature. Diopside-II is the most likely host of both Ca and Na, and probably the second most abundant mineral phase, in the lower mantle.
