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The results of X-ray diffraction ( XRD ) , showed that sample-2 possessed CuAl2 with different crystal structure whereas sample-1 did not .
 process characterization: X-ray diffraction; process characterization: XRD; machanical property: crystal structure
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 process characterization: X-ray diffraction; process characterization: XRD; machanical property: crystal structure