{{Infobox mineral | name = Apjohnite | boxwidth = | boxbgcolor = | image = Ilesite & Apjohnite.jpg | imagesize = | alt = | caption = Apjohnite (white) found with ilesite | struct image = | struct caption = | struct imagesize = | struct2 image = | struct2 caption = | struct2 imagesize= | SMILES = | Jmol = | category = | formula = Mn{{sup|2+}}Al{{sub|2}}(SO{{sub|4}}){{sub|4}}·22H{{sub|2}}O | IMAsymbol = API | molweight = | strunz = | dana = | system = | class = | symmetry = | unit cell = | color = Colourless, white, light pink, light yellow, light green | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | toughness = | mohs = 1.5-2 | luster = Silky | streak = White | diaphaneity = Transparent, Translucent | gravity = 1.78 - 1.81 | density = 1.78 - 1.81 g/cm3 (Measured)<br/>1.836 g/cm3 (Calculated) | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | Curie temp = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = | var1 = | var1text = | var2 = | var2text = | var3 = | var3text = | var4 = | var4text = | var5 = | var5text = | var6 = | var6text = }} '''Apjohnite''' (IMA symbol: Apj<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>) is a manganese aluminium sulfate mineral with the chemical formula Mn{{sup|2+}}Al{{sub|2}}(SO{{sub|4}}){{sub|4}}·22H{{sub|2}}O. It was named after Trinity College Dublin professor James Apjohn. Its type locality is Maputo Province, Mozambique.<ref>[https://mindat.org/min-281.html Apjohnite] {{Webarchive|url=https://web.archive.org/web/20190326150903/https://www.mindat.org/min-281.html |date=2019-03-26 }} on mindat.org</ref>
== References ==
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== External links ==
* [http://webmineral.com/data/Apjohnite.shtml Apjohnite data sheet on Webmineral] * [http://handbookofmineralogy.com/pdfs/apjohnite.pdf Apjohnite] on the ''Handbook of Mineralogy''
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Category:Manganese(II) minerals Category:Aluminium minerals Category:Sulfate minerals