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rapidly, monoclinic crystals can form above 95.5 °C. Furthermore, the conversion from monoclinic to rhombic sulphur will require some time and one can therefore assume that due to the rapid cooling the crystals are predominantly “frozen” into their monoclinic form. This assumption appears to be confirmed when studying a recipe for preparing rhombic sulphur crystals4. Powdered sulphur was dissolved in carbon disulphide and recrystallization occurred at room temperature i.e. the solution was not heated. In that respect it will be interesting to store these slides for a prolonged period of time and check whether the conversion from monoclinic to rhombic sulphur will continue on the slide itself. 6 LITERATURE 1. Beat Meyer; ‘Elemental Sulphur’; Chemical Reviews; 1976 3 76; p. 367-388. 2. Ruud Herold; "Zwavelkristallen"; Microwereld; April 2014; Nr 76; p. 10-13. 3. RSC; “Classic Chemistry Demonstrations”; 1995; ISBN 1870343387; p.191-195. 4. Charles H. Stone; “Preparation of rhombic sulfur crystals”; Journal of Chemical Education; 1932 5 9; p. 941. Ruud Herold, Hoofddorp, The Netherlands, April-May 2018 8PDF Image | Sulphur crystals
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