8046
The materials are classified into three distinctly different groups depending on the degree of recrystallization : ( i ) coated mesoporous zeolites ( RZEO - 1 ) ; ( ii ) micro - mesoporous nanocomposites ( RZEO - 2 ) ; and ( iii ) mesoporous materials with zeolitic fragments in the walls ( RZEO - 3 ) .
 zeolites
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 zeolites