Equations of state of Plagioclase Feldspars |
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Authors: | Email author" target="_blank">R?J?AngelEmail author |
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Institution: | (1) Crystallography Laboratory, Dept. GeoSciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA |
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Abstract: | The volume variation with pressure of seven intermediate plagioclase feldspars has been determined by high-pressure single-crystal X-ray diffraction. The bulk moduli of plagioclases for a 3rd-order Birch-Murnaghan EoS can be described by the following pair of equations:
with
for plagioclase with X
An
<20 and
for X
An
>35. These parameters can also be used in a Murnaghan EoS to describe the volume variation of plagioclase feldspars up to pressures of 3 GPa. For a Murnaghan EoS with
, the values of the bulk moduli can be described by a single equation,
, with a small loss in the accuracy of the predicted volumes up to pressures of 3 GPa.Editorial responsibility: T.L. GroveAn erratum to this article can be found at |
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Keywords: | |
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