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Title: Extraction of Plutonium-Containing Microcrystals from Hanford Soil using a Focused Ion Beam for Single-Crystal X-ray Diffraction Analysis

Journal Article · · Journal of Applied Crystallography

Herein we report the successful use of a focused ion beam/scanning electron microscope (FIB/SEM) to prepare microsamples of radioactive single-crystals for X-ray diffraction analysis. This technique was used to extract and analyze crystalline Pu-containing particles as small as 28 µm3 from Hanford soil taken from the 216-Z-9 waste crib which were then crystallographically characterized using single-crystal X-ray diffraction (SCXRD) to confirm the cubic structure of PuO2. As a systematic proof of concept, the technique was first tested using UO2 crystals milled into cubic shapes with approximate volumes 4620, 1331, 125, 8 and 1 µm3, respectively, in order to empirically determine the crystal size limits for characterization by a laboratory-based diffractometer with a sealed tube Mo or Ag anode X-ray source and a charge-coupled device (CCD) detector.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1577981
Report Number(s):
PNNL-SA-143576
Journal Information:
Journal of Applied Crystallography, Vol. 52, Issue Part 6
Country of Publication:
United States
Language:
English

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