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Determining the equation of state of amorphous solids at high pressure using optical microscopy
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10.1063/1.3688656
/content/aip/journal/rsi/83/3/10.1063/1.3688656
http://aip.metastore.ingenta.com/content/aip/journal/rsi/83/3/10.1063/1.3688656
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Images of amorphous red phosphorus taken at 1 GPa and 9.7 GPa. Images are overlaid to highlight the change in observed area due to isotropic compression, resulting in ΔA = 47 250 pixels.

Image of FIG. 2.
FIG. 2.

Equation of state measurements of cubic crystals: (a) cesium iodide and (b) sodium iodide. Black data points designate measurements in a diamond anvil cell using the microscopic technique described in this work. The red line represents data from Bridgman using a large volume press.3

Image of FIG. 3.
FIG. 3.

Equation of state of As2O3 glass up to 6.5 GPa. A 3rd order Birch-Murnaghan equation of state is fitted to the data to give K0 = 11.3 and K0 = 6.7. Inlay: Picture of gold coated As2O3 glass. A thin layer of sputter coated gold helps enhance the contrast between the glass and pressure medium when their refractive index and transparency are similar.

Image of FIG. 4.
FIG. 4.

Compression (circles) and decompression (squares) of GeSe2 glass up to 7.3 GPa. A 3rd order Birch-Murnaghan equation of state is fitted to the data to give K0 = 14.2 and K0 = 2.6.

Image of FIG. 5.
FIG. 5.

Equation of state of red (amorphous) phosphorus measured using the technique described in this work. Multiple compression/decompression cycles were performed up to 10 GPa at 298 K. The black lines represent a 3rd order Birch-Murnaghan fit. The discontinuity around 8 GPa is a result of the phase transition from red to black phosphorus. A large hysteresis is noticed for both forms upon decompression.

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/content/aip/journal/rsi/83/3/10.1063/1.3688656
2012-03-06
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Determining the equation of state of amorphous solids at high pressure using optical microscopy
http://aip.metastore.ingenta.com/content/aip/journal/rsi/83/3/10.1063/1.3688656
10.1063/1.3688656
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