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Q.

Which sulfur has needle shaped crystals?j

Tags: health, education, science
Asked by anantharaman, 23 Sep '12 08:08 pm
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Answers (8)

 
1.

In the solid state sulfur can exist in two different crystalline allotropes rhombic and monoclinic. At temperatures below 95.5C the rhombic form is stable, and any needle-shaped crystals of monoclinic sulfur which cool below this temperature will be gradually converted into the rhombic form. Conversely, the monoclinic form is stable between 95.5C and the melting point (119.25C), and when maintained at a temperature in this range the rhombic form slowly changes into monoclinic. However, if rhombic sulfur is heated rapidly it will melt at 112.8C to yield an amber-colored liquid. Rhombic and monoclinic sulfur are said to be enantiotropic allotropes, since one form is stable below a certain definite temperature or transition point while the second form is stable above this temperature. As the names of these two allotropes imply, the principal difference between them is in their crystalline structures. .
Answered by jakir hussain, 23 Sep '12 08:13 pm

 
  
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2.

Rhombic and monoclinic sulfur
Answered by saranathan Narasimhan, 24 Sep '12 04:07 pm

 
  
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3.

Prismatic
Answered by anil garg, 24 Sep '12 02:12 am

 
  
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4.

Monoclinic Sulphur.
Answered by Quest, 23 Sep '12 09:29 pm

 
  
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5.

Monoclinic Sulphur.
Answered by amitava duttamajumdar, 23 Sep '12 08:39 pm

 
  
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6.

Its monoclinic sulphur the crystals of it are needle shaped and are dark yellow in color............:-)
Answered by Bhuvana, 23 Sep '12 08:28 pm

 
  
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7.

Prismatic
Answered by Prince Deva, 23 Sep '12 08:28 pm

 
  
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8.

Monoclinic sulphur also known as rhombic sulfur
Answered by Rajiv Upendra Kamat, 23 Sep '12 08:27 pm

 
  
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