6643
By using extremely rough , chemically etched microstructured aluminium foils , anodization in phosphoric acid under very harsh conditions , e . g . , 10 wt % phosphoric acid and room temperature , can be repeatedly accomplished without suffering from breakdown .
 Chemical: aluminium; Chemical: phosphoric acid; Chemical: phosphoric acid
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: aluminium; Chemical: phosphoric acid; Chemical: phosphoric acid