“powder diffraction camera”的概念、定义、翻译、参考文献-科学参考

单词	powder diffraction camera
释义	powder diffraction camera [`pau̇d·ǝr di`frak·shǝn ´kam·rǝ] ^{CRYSTALLOGRAPHY} A metal cylinder having a window through which an x-ray beam of known wavelength is sent by an x-ray tube to strike a finely ground powder sample mounted in the center of the cylinder; crystal planes in this powder sample diffract the x-ray beam at different angles to expose a photographic film that lines the inside of the cylinder; used to study crystal structure. Also known as x-ray powder diffractometer.
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