<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31344461</termId><termName>calcite</termName><termType>PT</termType><termNote><![CDATA[ A common rock-forming mineral, usually white or gray, it is the chief constituent of limestone and most marble. ]]></termNote><termCreatedDate>2026-03-30 20:32:54</termCreatedDate><relation><relationType>BT</relationType><termId>31320469</termId><termName>mineral</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31437784</termId><termName>calcium carbonate white pigment</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31375319</termId><termName>Iceland spar</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31375456</termId><termName>lapis lazuli</termName><termType>PT</termType></relation></term>  </Zthes>