motukoreaite

{{Infobox mineral | name = Motukoreaite | category = Sulfate and Carbonate mineral | boxwidth = | boxbgcolor = | image = Motukoreaite-Phillipsite-91264.jpg | imagesize = 260px | caption = Yellow-white balls of motukoreaite held together by phillipsite | formula = Mg6Al3(OH)18[Na(H2O)6](SO4)2·6H2O (possibly more than one species) | IMAsymbol = Mtu | molweight = | strunz = 7.DD.35 | dana = 17.1.7.1 | system = Trigonal | class = Hexagonal scalenohedral (m) H-M symbol: ( 2/m) | symmetry = Rm | unit cell = a = 9.172(2) Å, c = 33.51(1) Å, Z = 3 | color = Colorless, white, pale yellow, pale yellow-green | habit = | twinning = | cleavage = Good on {0001}, perhaps a parting | fracture = | tenacity = Sectile, flexible | mohs = 1–1.5 | luster = Dull | polish = | refractive = nα = 1.510, nβ = 1.510 | opticalprop = Uniaxial (+) | birefringence = δ = 0.012 | 2V = | dispersion = | pleochroism = | fluorescence= | absorption = | streak = White | gravity = 1.43–1.53 | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Semitransparent | other = | references = }}

Motukoreaite is a mineral with formula Mg6Al3(OH)18[Na(H2O)6](SO4)2·6H2O (possibly more than one species). The mineral is named for Motukorea, the island in New Zealand where it was discovered. Motukoreaite was first noted in 1941 and officially described in 1977.