letovicite

Letovicite () is an ammonium sulfate mineral with composition (NH4)3H(SO4)2 (IUPAC: triammonium sulfate hydrogensulfate, Nickel–Strunz classification 07.AD.20).

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IMA Mineral Symbol: Let
chemical formula: (NH₄)₃H(SO₄)₂
Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 7.AD.20
Nickel-Strunz 9th edition (updated 2009): 7.AD.20
Commons category: Letovicite
Strunz 8th edition (series ID, updated): VI/A.04

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{{Infobox mineral | name = Letovicite | category = Sulfate mineral | image = Letovicite.jpg | imagesize = | alt = | caption = White crystals of ammonium sulfate mineral letovicite from the Anna 2 Mine, Aachen, North Rhine – Westphalia, Germany. | formula = (NH4)3H(SO4)2 | IMAsymbol = Let | molweight = | strunz = 07.AD.20 | dana = 28.1.3.1 | system = Monoclinic | class = Prismatic (2/m) | symmetry = C2/c (no. 15) | unit cell = | color = Colorless, white | habit = Tiny pseudo-hexagonal plates, granular | twinning = Lamellar twinning | cleavage = Distinct on {001} | fracture = Uneven | tenacity = | mohs = 1–2 | luster = | refractive = | opticalprop = Biaxial (−), colorless (transmitted light) | birefringence = | 2V = 75° (calc.) | pleochroism = | streak = | gravity = 1.83 | density = | melt = | fusibility = | diagnostic = | solubility = Soluble in water | diaphaneity = Transparent | other = | references = }}

Letovicite () is an ammonium sulfate mineral with composition (NH4)3H(SO4)2 (IUPAC: triammonium sulfate hydrogensulfate, Nickel–Strunz classification 07.AD.20).