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
收藏
页码：2242 / 2245
页数：4
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