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A new approach to kinetics study of the anhydrite crystallization at 373 K using a diamond anvil cell with Raman spectroscopy
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10.1063/1.4798645
/content/aip/journal/rsi/84/4/10.1063/1.4798645
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/4/10.1063/1.4798645

Figures

Image of FIG. 1.
FIG. 1.

Schematic drawing (a) and picture (b) of the hydrothermal diamond anvil cell (HDAC) we used in this work.

Image of FIG. 2.
FIG. 2.

Photograph of the Reinshaw 1000 Raman spectrometer located in Peking University.

Image of FIG. 3.
FIG. 3.

Interface of the PeakFit V4.04 software.

Image of FIG. 4.
FIG. 4.

A typical sequence of Raman patterns as a function of time (1322 MPa and 373 K).

Image of FIG. 5.
FIG. 5.

Transformed volume fraction X(t) of CaSO4 as a function of time at (a) 896 MPa, 373 K, (b) 984 MPa, 373 K, (c) 1076 MPa, 373 K, (d) 1322 MPa, 373 K. The experimental data (solid squares) are fitted by the Avrami equation.

Image of FIG. 6.
FIG. 6.

(a)–(d) Plots of lnln[1/(1−X(t))] versus ln(t) corresponding to the experimental data from Figs. 5(a)–5(d) , respectively.

Image of FIG. 7.
FIG. 7.

Plot of −RTlnk versus P using the obtained four values of the rate constant k at 373 K. The fitted straight line yields a volume change (ΔV m ) of −1.82 × 10−5 m3/mol.

Tables

Generic image for table
Table I.

Observed n-values and calculated rate constant k at various P-T conditions.

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/content/aip/journal/rsi/84/4/10.1063/1.4798645
2013-04-05
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A new approach to kinetics study of the anhydrite crystallization at 373 K using a diamond anvil cell with Raman spectroscopy
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/4/10.1063/1.4798645
10.1063/1.4798645
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