{{Short description|Hydrated basic magnesium carbonate mineral}}{{Infobox mineral | name = Artinite | image = Artinite - Atlas mine1, San Benito, California, USA.jpg | imagesize = 280px | alt = Artinite – Atlas mine, San Benito, California, US | caption = Artinite from New Idria District, California | category = Carbonate mineral | formula = {{chem2|Mg2(CO3)(OH)2*3H2O}} | IMAsymbol = Art<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.DA.10 | dana = | system = Monoclinic | class = Prismatic (2/m) <br/><small>(same H-M symbol)</small> | symmetry = ''C2/m'' | unit cell = a = 16.56, b = 3.15 <br/>c = 6.22&nbsp;[Å]; β = 99.15°; Z&nbsp;=&nbsp;2 | color = White | colour = | habit = Acicular crystals, fibrous veinlets, botryoidal crusts, and spherical aggregates | twinning = | cleavage = On {100} perfect; on {001} good. | fracture = | tenacity = | mohs = 2.5 | luster = Vitreous, silky | streak = White | diaphaneity = Transparent | gravity = 2.01 – 2.03 | density = | polish = | opticalprop = Biaxial (−) | refractive = nα = 1.488 – 1.489 nβ = 1.533 – 1.534 nγ = 1.556 – 1.557 | birefringence = δ = 0.068 | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | references = <ref name=HBM>[http://rruff.geo.arizona.edu/doclib/hom/artinite.pdf Handbook of Mineralogy]</ref><ref name=Mindat>[http://www.mindat.org/min-377.html Artinite on Mindat.org]</ref><ref name=Webmin>[http://www.webmineral.com/data/Artinite.shtml Artinite on Webmineral]</ref> }}

'''Artinite''' is a hydrated basic magnesium carbonate mineral with formula: {{chem2|Mg2(CO3)(OH)2*3H2O}}. It forms white silky monoclinic prismatic crystals that are often in radial arrays or encrustations. It has a Mohs hardness of 2.5 and a specific gravity of 2.

It occurs in low-temperature hydrothermal veins and in serpentinized ultramafic rocks. Associated minerals include brucite, hydromagnesite, pyroaurite, chrysotile, aragonite, calcite, dolomite and magnesite.<ref name=HBM/>

It was first reported in 1902 in Lombardy, Italy. It was named for Italian mineralogist, Ettore Artini (1866–1928).<ref name=Mindat/> [[File:Artinite-148070.jpg|thumb|left|Artinite sometimes forms balls of radiating, fibrous crystals. Specimen from New Idria district, California US. Size: 9.2 x 5.2 x 1.5 cm.]] {{clear left}}

==References== {{Reflist}}

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Category:Magnesium minerals Category:Carbonate minerals Category:Hydroxide minerals Category:Trihydrate minerals Category:Monoclinic minerals Category:Minerals in space group 12 Category:Minerals described in 1902

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