tamarugite

{{Infobox mineral | name = Tamarugite | category = Sulfate mineral | image = Tamarugite.jpg | imagesize = 260 | alt = | caption = | formula = NaAl(SO4)2 · 6H2O | IMAsymbol = Tmr | molweight = | strunz = 7.CC.10 | dana = 29.5.3.1 | system = Monoclinic | class = Prismatic (2/m) | symmetry = P21/a (no. 14) | unit cell = | color = Colorless | habit = Prismatic, tabular | twinning = Polysynthetic | cleavage = {010} perfect | fracture = | tenacity = | mohs = 3 | luster = Vitreous | refractive = | opticalprop = Biaxial (+), colorless (transmitted light) | birefringence = | 2V = 60° (measured), 48° (calculated) | pleochroism = | streak = | gravity = 2.07 | density = 2.07 (measured) | melt = | fusibility = | diagnostic = | solubility = Soluble in water | diaphaneity = Transparent | other = Slightly astringent and sweet taste | references = }}

Tamarugite (NaAl(SO4)2·6H2O) is a colorless monoclinic sulfate mineral.