24683
For the Ar19Kr n Xe19 , Ar19Kr19Xe n , and Ar n Kr19Xe19 ( n = 0 - 17 ) clusters investigated , the results show that only two minimum energy configurations exist , i . e . , polytetrahedron and six - fold pancake .
 Chemical: Ar19Kr n Xe19; Chemical: Ar19Kr19Xe n; Chemical: Ar n Kr19Xe19
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: Ar19Kr n Xe19; Chemical: Ar19Kr19Xe n; Chemical: Ar n Kr19Xe19