8322
The high sphericity of the PF ( 6 ) ( - ) ion is hypothesized to play an important role in the decoupling of its rotational dynamics that appear to be practically independent of the averaged cation - anion interaction .
 Chemical: PF ( 6 ) ( - )
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: PF ( 6 ) ( - )