<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31344482</termId><termName>magnetite</termName><termType>PT</termType><termNote><![CDATA[ Black opaque mineral composed of ferro-ferric oxide that is strongly magnetic; a common mineral in large deposits in Sweden, Norway, the Urals, Italy, Switzerland, Australia, Brazil, United States, and Canada. Magnetite is brittle and fractures unevenly. When it possess a polarity, magnetite is called lodestone. Magnetite was used in antiquity for jewelry, amulet beads, seals and as a substitute for black pearls. It is also used as a black pigment in paints, linoleum, ceramic glazes, and glass.  ]]></termNote><termCreatedDate>2026-03-30 20:32:54</termCreatedDate><relation><relationType>UF</relationType><termId>31344483</termId><termName>iron ore, magnetic</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31344484</termId><termName>magnetic iron ore</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31344485</termId><termName>ore, magnetic iron</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31320469</termId><termName>mineral</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31375339</termId><termName>lodestone</termName><termType>PT</termType></relation></term>  </Zthes>