14882
The compound thermally decomposes starting at ~ 250 degrees C and higher temperatures , depending on the particle sizes , owing to the loss of the weakly coordinated Cu ( I ) cations from the structure and a concurrent disproportionation reaction at its surfaces .
 Chemical: Cu ( I )
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: Cu ( I )