Editing Feldspar (section)

==Etymology==
The name ''feldspar'' derives from the [[German language|German]] {{Lang|de|Feldspat}}, a compound of the words ''{{Lang|de|Feld}}'' ("field") and {{Lang|de|Spat}} ("flake"). {{Lang|de|Spat}} had long been used as the word for "a [[Rock (geology)|rock]] easily cleaved into flakes"; {{Lang|de|Feldspat}} was introduced in the 18th century as a more specific term, referring perhaps to its common occurrence in rocks found in fields (Urban Brückmann, 1783) or to its occurrence as "fields" within granite and other minerals (René-Just Haüy, 1804).<ref name="Lüschen">{{citation| author= Hans Lüschen | title= Die Namen der Steine. Das Mineralreich im Spiegel der Sprache | edition= 2nd| publisher= Ott Verlag | place= Thun | year= 1979 | page=215 | isbn= 3-7225-6265-1}}</ref>
The change from {{Lang|de|Spat}} to ''-spar'' was influenced by the English word [[Spar (mineralogy)|''spar'']],<ref>{{OEtymD|feldspar|accessdate=2008-02-08}}</ref> meaning a non-opaque mineral with good cleavage.<ref name="OED1">{{cite web | url=https://en.oxforddictionaries.com/definition/spar#spar_Noun_300 | archive-url=https://web.archive.org/web/20160926020824/https://en.oxforddictionaries.com/definition/spar#spar_Noun_300 | url-status=dead | archive-date=September 26, 2016 | title=spar | publisher=Oxford Dictionaries | work=Oxford English Dictionary | access-date=13 January 2018}}</ref> ''Feldspathic'' refers to materials that contain feldspar. The alternate spelling, ''felspar'', has fallen out of use. The term "felsic", meaning light coloured minerals such as quartz and feldspars, is an acronymic word derived from ''fel''dspar and ''si''lica, unrelated to the obsolete spelling "felspar".