<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31319758</termId><termName>crystal</termName><termType>PT</termType><termNote><![CDATA[ A solid body having a characteristic internal structure and enclosed by systematically arranged plane surfaces. ]]></termNote><termCreatedDate>2026-03-30 20:26:10</termCreatedDate><relation><relationType>BT</relationType><termId>31305825</termId><termName>materials by physical form</termName><termType>PT</termType></relation></term>  </Zthes>