<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">x-ray powder diffraction</topic></authority><related type="broader"><topic>x-ray diffraction</topic></related><variant type="other"><topic>XRPD</topic></variant><variant type="other"><topic>diffraction, x-ray powder</topic></variant><variant type="other"><topic>powder x-ray diffraction</topic></variant> <note xml:lang="en"><![CDATA[ Technique applying x-ray diffraction to crystalline or powder samples in order to ascertain their structure. ]]></note></mads>