8631
Characterizations of sulfided samples ( using XRD , TEM and electron diffraction ) have shown the formation of oriented polycrystalline ZnS nanoparticles with a predominant hexagonal form ( wurtzite phase ) .
 ZnS, wurtzite
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ZnS, wurtzite