High-pressure compressibility and phase stability of Mn-dolomite (kutnohorite)

被引：4

作者：

Palaich, Sarah E. M. ^{[1
]}

Heffern, Robert A. ^{[1
]}

Watenphul, Anke ^{[1
]}

Knight, Jason ^{[2
]}

Kavner, Abby ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

来源：

AMERICAN MINERALOGIST | 2015年 / 100卷 / 10期

关键词：

Carbonate; high-pressure; X-ray diffraction; dolomite; compressibility;

D O I：

10.2138/am-2015-5095

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We measured the bulk modulus and phase stability of a natural Mn-dolomite, kutnohorite, to 19 GPa. At room temperature, kutnohorite is stable in the rhombohedral dolomite phase up to 19 GPa, with an isothermal bulk modulus of 85(6) GPa (K' = 4). The compressibility of kutnohorite is found to match well with both single and double carbonate trends with respect to bulk modulus and unit-cell volume. The thermoelastic properties measured in this study show that the Mn dolomite end-member fits well with the systematic of all the rhombohedral carbonates, both calcite (single carbonate) and dolomite (double carbonate) type.

引用

页码：2242 / 2245

页数：4

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