<?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">mixtures</topic></authority><related type="narrower"><topic>formulations</topic></related><related type="other"><topic>compounds</topic></related><related type="broader"><topic>materials by physical form</topic></related><variant type="other"><topic>mixture</topic></variant> <note xml:lang="en"><![CDATA[ Mechanical combinations of two or more substances in no definite proportions, within which the constituent substances retain their individual properties and are separable by ordinary physical means. For complex pure substances made up of two or more elements in definite proportions which lose their individual properties and are held together by chemical bonds, use "compounds." ]]></note></mads>