{{Short description|Group of hydrous strontium carbonate minerals}} {{Infobox mineral | name = Ancylite | image = Nenadkevichite-Ancylite-20236.jpg | alt = | caption = Nenadkevichite with ancylite crystals on the side | category = Carbonate mineral | formula = {{chem2|Sr(Ce,La)(CO3)2(OH)*H2O}} |IMAsymbol=Anc<ref>{{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}}</ref> | molweight = | strunz = 5.DC.05 | dana = 16b.1.1.1 | system = Orthorhombic | class = Dipyramidal (mmm) <br/>H-M symbol: (2/m 2/m 2/m) | symmetry = ''Pmcn'' | unit cell = | color = Light yellow, orange-yellow, yellow-brown, grey | colour = | habit = | twinning = | cleavage = None | fracture = Splintery | tenacity = Brittle | mohs = 4–4.5 | luster = Dull | streak = White | diaphaneity = Translucent | gravity = | density = 3.95 g/cm<sup>3</sup> | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = }}
'''Ancylite''' is a group of hydrous strontium carbonate minerals containing cerium, lanthanum and minor amounts of other rare-earth elements. The chemical formula is {{chem2|Sr(Ce,La)(CO3)2(OH)*H2O}} with ancylite-Ce enriched in cerium and ancylite-La in lanthanum.<ref name=Webmin>http://webmineral.com/data/Ancylite-(Ce).shtml Webmineral data Ancylite-Ce.</ref><ref name=Handbook>http://www.handbookofmineralogy.org/pdfs/ancylitela.pdf{{dead link|date=October 2016 |bot=InternetArchiveBot |fix-attempted=yes }} Handbook of Mineralogy.</ref>
Ancylite was first described in 1899 for an occurrence in the Narsarsuk pegmatite in west Greenland and named from the {{langx|grc|ἀγκύλος}} for ''curved'' in reference to its rounded or distorted crystal form.<ref name=Webmin/><ref name=Mindat>http://www.mindat.org/min-216.html Mindat.</ref>
==References== {{Reflist}}
Category:Carbonate minerals Category:Strontium minerals Category:Lanthanide minerals Category:Orthorhombic minerals Category:Minerals in space group 62 Category:Hydroxide minerals Category:Monohydrate minerals Category:Minerals described in 1899
{{carbonate-mineral-stub}}