TY  - JOUR
A1  - Fei,Hongzhan
A1  - Druzhbin,Dmitry
A1  - Katsura,Tomoo
T1  - The Effect of Water on Ionic Conductivity in Olivine
Y1  - 2020
VL  - 125
IS  - 3
JF  - Journal of Geophysical Research: Solid Earth
DO  - 10.1029/2019JB019313
DO  - 10.23689/fidgeo-5146
N2  - High-temperature ionic conductivity in olivine single crystals has been measured in the [100], [010], and [001] crystallographic orientations as a function of pressure from 2 to 10 GPa, temperature from 1450 to 2180 K, and H2O content from 20 to 580 wt. ppm using multianvil presses with in situ impedance analyses. The experimental results yield an activation energy, activation volume, and H2O content exponent of 250–405 kJ/mol, 3.2–5.3 cm3/mol, and 1.3 ± 0.2, respectively, for the high-temperature ionic conduction regime. Olivine ionic conductivity has negative pressure and positive temperature dependences and is significantly enhanced by H2O incorporation. The [001] direction is more conductive than the [100] and [010] directions. The H2O-enhanced ionic conductivity may contribute significantly to the electrical conductivity profile in the asthenosphere, especially in the regions under relatively high-temperature and low-pressure conditions.
UR  - http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9492
ER  -