@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix mi: <https://taxonomy.materialinstruments.com/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://taxonomy.materialinstruments.com/id/material/feldspar>
  a skos:Concept ;
  skos:inScheme <https://taxonomy.materialinstruments.com/id/axis/material> ;
  skos:prefLabel "Feldspar"@en ;
  skos:definition "A group of rock-forming aluminosilicate minerals containing potassium, sodium or calcium, among the most abundant mineral groups in the Earth's crust."@en ;
  skos:broader <https://taxonomy.materialinstruments.com/id/material/mineral> ;
  skos:closeMatch <http://www.wikidata.org/entity/Q170258> ;
  mi:searchedWithout [ dcterms:date "2026-10-21" ; mi:query "Feldspar" ; mi:scheme "uniclass" ; mi:via "https://uniclass.thenbs.com/search?query=Feldspar&filter=status%3ACurrent" ] ;
  mi:sourceBasis "authored" ;
  dcterms:source "composition dictionary in a materials-retrieval system (src-05); in-house definition" ;
  mi:status "active" .