25535
Immediately following the synthesis , carbonate - substituted ( B - type ) hydroxyapatite particles are mechanochemically synthesized by wet milling dicalcium phosphate dihydrate and calcium carbonate in a dispersed suspension of magnetite nanoparticles , during which the magnetite nanoparticles are incorporated into the hydroxyapatite matrix .
 Chemical: carbonate; Chemical: hydroxyapatite; Chemical: dicalcium phosphate dihydrate; Chemical: calcium carbonate; Chemical: magnetite; Chemical: magnetite; Chemical: hydroxyapatite
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: carbonate; Chemical: hydroxyapatite; Chemical: dicalcium phosphate dihydrate; Chemical: calcium carbonate; Chemical: magnetite; Chemical: magnetite; Chemical: hydroxyapatite