arctite

{{Short description|Colourless mineral found in the Kola Peninsula northern Russia}}

{{Infobox mineral

| name = Arctite

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| image = Arctite.jpg

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| caption = Arctite crystals

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| formula = (Na₂Ca₄(PO₄)₃F)

| IMAsymbol = Arc

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| color = Colorless

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| mohs = 5

| luster = Vitreous, Sub-Vitreous, Pearly

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| gravity = 3.13

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Arctite (Na₂Ca₄(PO₄)₃F) is a colourless mineral found in the Kola Peninsula northern Russia.[http://rruff.geo.arizona.edu/doclib/hom/arctite.pdf Mineral Handbook] Its IMA symbol is Arc.{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA-CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}} It has a Mohs hardness of 5 and has a specific gravity of 3.13. Arctite is transparent with a vitreous lustre. Arctite has a perfect cleavage and a trigonal crystal system.[http://www.mindat.org/min-316.html Mindat.org] It is also a naturally occurring antiperovskite.[https://www.mindat.org/min-53194.html Arctite Supergroup on Mindat]

Common associates of arctite include aegirine, natisite, lomonosovite, umbite and thenardite.