science-softCon uv/vis+ spectra data base;	 	www.uv-spectra.de, (C) science-softCon 2010

Substance: thionyl fluoride	 			Other Names: sulfur difluoride oxide

Formula: SOF2					CAS-No.: 7783-42-8

Study: uv absorption coefficients


Authors: C. Pradayrol, A. Casanovas, I. Deharo, J. Guelfucci, J. Casanovas

Title: Absorption Coefficients of SF6, SF4, SOF2 and SO2F2 in the Vacuum Ultraviolet

Journal/Source: Journal de Physique III 6, 5,603-612, (1996) ; DOI: 10.1051/jp3:1996143


Data: (diagram, table, disk): diagram

Wavelength/Energy range: 120 - 200 nm

Resolution: 0.1 nm

Temperature: 298 K

Temperature dependence: 

Pressure/Concentration): 10-100 Pa (120-145 nm wavelength range); 50-700 Pa (140-195 nm)

Phase (gas, liquid, solid): gas

pH:


Comments: Absorption coefficients k0(m-1 100 kPa-1) of SF6 and of its main gaseous by-products SF4, SOF2 and SO2F2 were 
measured in the VUV region. The experiments were carried out at a temperature of 298 K and a spectral resolution of 0.1 nm over 
the wavelength range 115-180 nm for SF6, 115-220 nm for SF4, 120-195 nm for SOF2 and 120-210 nm for SO2F2.
SOF2 presents a very strong absorption between 135 and 200 nm with two maxima at 138 nm ( ~ 2.26 x 10^-4 m-1) and at 180.6 nm
(~ 5.1 x 10^3 m-1). Between 120 and 135 nm SOF2 presents a third absorption peak at 129.4 nm (k0 = 4.5 x 10^4 m-1). There is a minimum
of absorption at around 123.6 nm.

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