TY - RPRT TI - Certification of Standard Reference Material® 640g: Line Position and Line Shape Standard for Powder Diffraction (Silicon Powder) AU - Cline, James P PY - 2024 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 260-245 DO - 10.6028/NIST.SP.260-245 ER -