<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31373529</termId><termName>geopolymers</termName><termType>PT</termType><termNote><![CDATA[ Any of a class of synthetic aluminosilicate materials, chains or networks of mineral molecules linked with covalent bonds, used in concrete-polymer composites as an alternative to Portland cement; in resins and binders; and as a decorative cast stone-like material. ]]></termNote><termCreatedDate>2026-03-30 20:40:44</termCreatedDate><relation><relationType>UF</relationType><termId>31373530</termId><termName>geopolymer</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31343235</termId><termName>polymers</termName><termType>PT</termType></relation></term>  </Zthes>