Assertion: berkelium's structure | /r/CapableOf | use x-ray diffraction
Facets:
value: over a period
type: TEMPORAL
Source sentences:
text: An important phenomenon for radioactive solids has been studied for these two crystal forms: the structures of fresh and aged 249BkBr 3 samples were studied using X-ray diffraction over a period longer than 3 years, so that various fractions of 249Bk had beta decayed to 249Cf.