<?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">strontium isotopes</topic></authority><related type="broader"><topic>strontium, strontium isotopes, compounds, alloys</topic></related><related type="broader"><topic>isotopes</topic></related><variant type="other"><topic>isotopes, strontium</topic></variant><variant type="other"><topic>strontium isotope</topic></variant> <note xml:lang="en"><![CDATA[ In an archaeological context, analysis of stable strontium isotopes in ancient objects and materials can supply information about date and provenance.  Strontium in its isotopic form. ]]></note></mads>