<?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">physical chemistry</topic></authority><related type="narrower"><topic>photochemistry</topic></related><related type="narrower"><topic>crystallography</topic></related><related type="broader"><topic>chemistry</topic></related><variant type="other"><topic>chemical-physical</topic></variant><variant type="other"><topic>chemistry, physical</topic></variant><variant type="other"><topic>physico-chemical</topic></variant><variant type="other"><topic>physicochemical</topic></variant><variant type="other"><topic>physiochemical</topic></variant> <note xml:lang="en"><![CDATA[ Study of the relationship between the physical properties of substances and their chemical properties. ]]></note></mads>