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Preparation of rhombic and monoclinic sulphur

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Preparation of rhombic and monoclinic sulphur
  • 1 answers

Yogita Ingle 4 years ago

1) Rhombic Sulphur

  • We find them as yellow and translucent crystals.
  • Rhombic Sulphur has a melting point of 114C.
  • The density of rhombic Sulphur is 2.08 g/cm3
  • It is stable at temperatures below 96oC.

2) Monoclinic Sulphur

  • These are transparent and amber crystals.
  • They have a melting point of 119oC.
  • The density of monoclinic sulphur is 1.98 gcm3
  • It is unstable at temperatures below 96oC and changes into rhombic form.
  • We must remember that at a temperature of 96oC or above, rhombic sulphur changes to kaleidoscopic or prismatic sulphur. At 96oC or beneath, kaleidoscopic or prismatic sulphur changes to rhombic sulphur.
  • These allotropes that alter their configuration from one form to another by a change in the temperature are Enantiotropic Allotropes.
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