European Journal of Mineralogy; June 2001; v. 13; no. 3;
p. 507-519; DOI: 10.1127/0935-1221/2001/0013-0507
© 2001 E. Schweizerbart'sche Verlagsbuchhandlung Science Publishers
Raman spectra and lattice-dynamical calculations of natrolite
Sergei V. GORYAINOV1,* and
Mikhail B. Smirnov2
1 Institute of Mineralogy and Petrography, pr. Ak.Koptyuga, 3, Novosibirsk, 630090, Russia
2 Institute for Silicate Chemistry, ul. Odoevskogo, 24, korp.2, St. Petersburg, 199155, Russia

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Fig. 1. Raman spectra of single-crystal natrolite using various scattering geometries. The dots mark the remnant bands from other geometry of scattering. The small intensity laser line at 38.4 cm1 is marked by the A sign.
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Fig. 2. Vibration form for the strong Raman band of natrolite at 443 cm1, calculated in the valence force field M-1 model.
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Fig. 3. Vibration form for the strongest Raman band of natrolite at 534 cm1, calculated in the valence force field M-1 model.
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Fig. 4. Phonon dispersion curves for natrolite along k(00 ), calculated using the valence force field M-1 model.
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Fig. 5. Pressure dependence of the unit-cell volume of natrolite compressed in SF6. Experimental values (Kholdeev et al., 1987) obtained by X-ray measurements in DAC are shown by solid circles. The calculated curve corresponds to a polynomial fit to experimental points by least squares (up to the third power in P); from this interpolation the bulk modulus K0 = 47 ± 6 GPa and its derivative K0 = 5.8 ± 0.8 were obtained.
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