<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31373585</termId><termName>smectite</termName><termType>PT</termType><termNote><![CDATA[ Any of a group of expanding-lattice clay minerals, the chief constituent of bentonite and fuller's earth. ]]></termNote><termCreatedDate>2026-03-30 20:40:45</termCreatedDate><relation><relationType>BT</relationType><termId>31344537</termId><termName>clay mineral</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31343249</termId><termName>silicates</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31410804</termId><termName>montmorillonite</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31374837</termId><termName>fuller&apos;s earth</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31411931</termId><termName>bentonite</termName><termType>PT</termType></relation></term>  </Zthes>