<?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">alkali feldspar</topic></authority><related type="narrower"><topic>microcline</topic></related><related type="narrower"><topic>orthoclase</topic></related><related type="narrower"><topic>sanidine</topic></related><related type="narrower"><topic>anorthoclase</topic></related><related type="broader"><topic>feldspar</topic></related><variant type="other"><topic>feldspar, alkali</topic></variant> <note xml:lang="en"><![CDATA[ Feldspar used in the manufacture of ceramics and glass, as well as gemstones. ]]></note></mads>