Phase Transitions and Second-Harmonic Generation in Sodium Monothiophosphate
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- 作者：Nathan J. Takas and Jennifer A. Aitken
- 刊名：Inorganic Chemistry
- 出版年：2006
- 出版时间：April 3, 2006
- 年：2006
- 卷：45
- 期：7
- 页码：2779 - 2781
- 全文大小：79K
- 年卷期：v.45,no.7(April 3, 2006)
- ISSN：1520-510X
文摘
Oxythiophosphate compounds, which contain anions comprisedof oxidized phosphorus bound to oxygen and sulfur, are scarceand, in general, poorly characterized. Although 
-Na3PO3S hasbeen known for over 60 years, little has been revealed about thiscompound. Here we present thermal analysis and second-harmonic-generation (SHG) efficiency of -Na3PO3S. Details aboutits transformation to the high-temperature 
phase are discussed.Under vacuum, -Na3PO3S undergoes one endothermic event at553 
C upon heating and two exothermic events at 504 and 467C upon cooling. -Na3PO3S can be trapped upon quenchingNa3PO3S from high temperature. We have observed that the phase converts back to the phase at room temperature.Interestingly, relative humidity has been determined to catalyzethis phase transformation. -Na3PO3S oxidizes at 315 C in air toproduce Na4P2O7 and Na2SO4. Upon exposure to 1064-nm incidentradiation, noncentrosymmetric -Na3PO3S produces an SHGefficiency 200 times that of -quartz and is nonphase-matchable(type 1).
-Na3PO3S hasbeen known for over 60 years, little has been revealed about thiscompound. Here we present thermal analysis and second-harmonic-generation (SHG) efficiency of -Na3PO3S. Details aboutits transformation to the high-temperature phase are discussed.Under vacuum, -Na3PO3S undergoes one endothermic event at553 C upon heating and two exothermic events at 504 and 467C upon cooling. -Na3PO3S can be trapped upon quenchingNa3PO3S from high temperature. We have observed that the phase converts back to the phase at room temperature.Interestingly, relative humidity has been determined to catalyzethis phase transformation. -Na3PO3S oxidizes at 315 C in air toproduce Na4P2O7 and Na2SO4. Upon exposure to 1064-nm incidentradiation, noncentrosymmetric -Na3PO3S produces an SHGefficiency 200 times that of -quartz and is nonphase-matchable(type 1).