<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31344637</termId><termName>cementite</termName><termType>PT</termType><termNote><![CDATA[ Extremely hard carbide of iron, a synthetic phase in technical iron alloys; in its naturally occurring form it is known as cohenite. ]]></termNote><termCreatedDate>2026-03-30 20:32:57</termCreatedDate><relation><relationType>BT</relationType><termId>31320469</termId><termName>mineral</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31343510</termId><termName>iron</termName><termType>PT</termType></relation></term>  </Zthes>