X-ray powder diffractometer

例句：

1. 1.This instrument is used to analyze the crystal structure of materials.
   这个仪器用于分析材料晶体结构。
2. 2. The X-ray powder diffractometer was used to identify the mineral composition of the sample.
   X射线粉末衍射仪被用来鉴定样品的矿物组成。
3. 3. The X-ray powder diffractometer was used to study the crystallization process of the material.
   X射线粉末衍射仪被用来研究材料的结晶过程。