Raman spectrum of Na2SO4 (phases I and II)
β Scribed by Byoung-Koo Choi; D.J. Lockwood
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 354 KB
- Volume
- 76
- Category
- Article
- ISSN
- 0038-1098
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π SIMILAR VOLUMES
The formation of double salts in the system Na,SO,-CaSO,-H,O has been investigated by solid-gas reactions. The hydration processes of the quenched phases 2Na,SO,. CaSO, and (Na, ,Ca,,,),SO, have been monitored by thermogravimetry and X-ray diffraction in the presence of a definite water vapour press
Single crystals of Na 1.75 Yb 0.08 SO 4 , Na 1.82 Y 0.06 SO 4 , and Na 1.70 Ln 0.10 SO 4 (Ln 3Ψ β«Ψβ¬La, Yb), were grown at 1300 K by the Czochralski method. The Yb 3Ψ and Y 3Ψ substituted crystals transform upon cooling to a monoclinic phase intergrown in a twin relationship. However, the high-temper
IR and Raman spectra have been obtained of NazSOa and KzSO4 molecules, present over the heated crystalline sulphates, in argon and nitrogen matrices at 12 K. t+d symmetry is indicated for these molecules. Evidence of agregation on warming \*the matrix has been observed. Sublimation of Na2S04 was acc