Editing Perlite (section)

{{short description|Amorphous volcanic glass}}
{{for|the two-phased structure in steel|pearlite}}
[[File:Schultz Horticultural Perlite.jpg|thumb|upright=1.3|Expanded horticultural perlite]]
'''Perlite''' is an [[amorphous]] [[volcanic glass]] that has a relatively high [[water]] content, typically formed by the [[Hydrate|hydration]] of [[obsidian]]. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently. It is an [[industrial minerals|industrial mineral]], suitable "as ceramic flux to lower the [[sintering]] temperature", and a commercial product useful for its low density after processing.<ref name=reka19>{{cite journal |last1=Reka |first1=Arianit A. |last2=Pavlovski |first2=Blagoj |last3=Lisichkov |first3=Kiril |last4=Jashari |first4=Ahmed |last5=Boev |first5=Blažo |last6=Boev |first6=Ivan |last7=Lazarova |first7=Maja |last8=Eskizeybek |first8=Volkan |last9=Oral |first9=Ayhan |last10=Makreski |first10=Petre |title=Chemical, mineralogical and structural features of native and expanded perlite from Macedonia |journal=Geologia Croatica |date=24 October 2019 |volume=72 |issue=3 |pages=215–221–215–221 |doi=10.4154/gc.2019.18 |url=http://www.geologia-croatica.hr/index.php/GC/article/view/gc.2019.18 |access-date=4 January 2020 |language=en |issn=1333-4875|doi-access=free }}</ref>