Article

Compressibility of nanocrystalline forsterite

Physics and Chemistry of Minerals (impact factor: 1.73). 04/2012; 37(6):343-351. DOI:10.1007/s00269-009-0337-8 pp.343-351

ABSTRACT We established an equation of state for nanocrystalline forsterite using multi-anvil press and diamond anvil cell. Comparative
high-pressure and high-temperature experiments have been performed up to 9.6GPa and 1,300°C. We found that nanocrystalline
forsterite is more compressible than macro-powder forsterite. The bulk modulus of nanocrystalline forsterite is equal to 123.3
(±3.4) GPa whereas the bulk modulus of macro-powder forsterite is equal to 129.6 (±3.2) GPa. This difference is attributed
to a weakening of the elastic properties of grain boundary and triple junction and their significant contribution in nanocrystalline
sample compare to the bulk counterpart. The bulk modulus at zero pressure of forsterite grain boundary was determined to be
83.5GPa.

KeywordsEquation of state-Nanocrystalline mineral-High-pressure high-temperature experiments-Subducting slab

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Keywords

bulk counterpart
 
bulk modulus
 
compressible
 
diamond anvil cell
 
elastic properties
 
forsterite grain boundary
 
grain boundary
 
high-temperature experiments
 
KeywordsEquation
 
macro-powder forsterite
 
nanocrystalline forsterite
 
significant contribution
 
state-Nanocrystalline mineral-High-pressure high-temperature experiments-Subducting slab
 
triple junction