Simons, J. H.; Pearlson, W. H.; Brice, T. J.; Wilson, W. A.; Dresdner, R. D.
Journal of the Electrochemical Society, 1949 , vol. 95, p. 59 - 64
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Gmelin Handbook: F: SVol.1, 60, page 221 - 224
Simons, J. H.; Francis, H. T.; Hogg, J. A.
Journal of the Electrochemical Society, 1949 , vol. 95, p. 53 - 55
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Gmelin Handbook: F: SVol.1, 60, page 221 - 224
Varshavskii, Ya. M.; Shatenstein, A. I.
Doklady Akademii Nauk SSSR, 1954 , vol. 95, p. 297 - 299
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Gmelin Handbook: F: SVol.3, 2.1.1.4, page 18 - 19
in neat (no solvent)
detailed description of apparatus given; introduction of HF to cooled S4N4/CuO mixture (cooling mixture); heating (2h/100°C); cooled (liquid air or CO2/alc.);; frationation;;