<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31482068</termId><termName>phenakite</termName><termType>PT</termType><termNote><![CDATA[ Phenakite or phenacite is a fairly rare nesosilicate mineral consisting of beryllium orthosilicate (Be2SiO4), and occurring as colourless or white scales and prisms, and occasionally used as a gemstone in jewelry. Its name comes from Ancient Greek: phénax, meaning "deceiver" due to its close visual similarity to quartz, named by Nils Gustaf Nordenskiöld in 1833. ]]></termNote><termCreatedDate>2026-03-30 20:32:58</termCreatedDate><relation><relationType>UF</relationType><termId>31482069</termId><termName>phenacite</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31320469</termId><termName>mineral</termName><termType>PT</termType></relation></term>  </Zthes>