<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31412203</termId><termName>sanidine</termName><termType>PT</termType><termNote><![CDATA[ Glassy form of orthoclase in which sodium may replace up to half of the potassium. ]]></termNote><termCreatedDate>2026-03-30 20:50:50</termCreatedDate><relation><relationType>UF</relationType><termId>31412204</termId><termName>feldspar, glassy</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31412205</termId><termName>glassy feldspar</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31375330</termId><termName>alkali feldspar</termName><termType>PT</termType></relation></term>  </Zthes>