Compression of calcite to 40 KB
Compression of calcite to 40 KB
复制标题
将方解石压缩至 40 KB
DOI：
10.1029/jb079i017p02615
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发表时间：
1974
影响因子：
--
通讯作者：
G. Kennedy
中科院分区：
文献类型：
--
作者：
A. Singh;G. Kennedy
本文用活塞-圆筒装置重新测定了方解石的压缩系数。发现方解石1在14.5kbar下以0.00483cm3/g的体积变化转变为方解石2，并且发现方解石2在17.4kbar下以0.01291cm3/g的体积变化转变为方解石3。三个阶段的体积压缩数据由以下二次关系描述：
方解石1
- （ΔV/V0）=-14.07 10 -4P+5.107×10-6P2
方解石2
- （ΔV/V0）=0.0382-67.80×10-4P+1.291×10-4P2
方解石3
- （ΔV/V0）=-0.0476-19.33×10-4P+17.34×10-6P2
其中P是压强，单位为帕。方解石1和方解石3的压缩数据与文献中的数据吻合良好。首次报道了显示方解石2异常高压缩的数据。方解石2的压缩数据已被用来定量解释在方解石中观察到的超声波声速在15千巴附近的异常下降。
The compressibility of calcite to 40 kbar has been remeasured by using a piston-cylinder apparatus. Calcite 1 is found to transform to calcite 2 at 14.5 kbar with a volume change of 0.00483 cm3/g, and calcite 2 is found to change to calcite 3 at 17.4 kbar with a volume change of 0.01291 cm3/g. The volume compression data for the three phases are described by the following quadratic relations:
Calcite 1
-(ΔV/V0)=-14.07×10-4P+5.107×10-6P2
Calcite 2
-(ΔV/V0)=0.0382-67.80×10-4P+1.291×10-4P2
Calcite 3
-(ΔV/V0)=-0.0476-19.33×10-4P+17.34×10-6P2
where P is pressure in kilobars. The compression data for calcite 1 and calcite 3 are in good agreement with those available in the literature. The data exhibiting an abnormally high compression of calcite 2 have been reported for the first time. The compression data for calcite 2 have been used to explain quantitatively the abnormal drop near 15 kbar observed in the ultrasonic sound velocity in calcite.