<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31344647</termId><termName>sylvite</termName><termType>PT</termType><termNote><![CDATA[ A colorless or white mineral consisting of potassium chloride, occurring typically as cubic crystals. It is rarer than halite (sodium chloride) and occurs as soft, bitter-tasting, white or grayish, glassy cubes or as masses with halite and gypsum in evaporite deposits in Germany, New Mexico, and Mount Vesuvius. ]]></termNote><termCreatedDate>2026-03-30 20:32:57</termCreatedDate><relation><relationType>UF</relationType><termId>31344648</termId><termName>sylvine</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31320469</termId><termName>mineral</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31373745</termId><termName>potassium chloride</termName><termType>PT</termType></relation></term>  </Zthes>