lecontite
Sign in to saveLecontite (sodium ammonium sulfate dihydrate, with potassium substituting for some ammonium, typically about a fourth) is a sulfate mineral with the formula (NH4,K)NaSO4·2H2O. It was found by John Lawrence LeConte in Las Piedras Cave in Honduras as a breakdown product of bat guano, including crystals up to an inch long and identified as a separate mineral by W.J. Taylor in 1858. As of 1963 most natural specimens came from the same cave.
Wikidata facts
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- Nickel-Strunz 9th edition (updated 2009)
- 7.CD.15
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 7.CD.15
- IMA Mineral Symbol
- Lcn
- chemical formula
- (NH₄,K)NaSO₄ * 2H₂O
- Strunz 8th edition (series ID, updated)
- VI/C.15
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{{Infobox mineral | name = Lecontite | category = Sulfate mineral | boxwidth = | boxbgcolor = | image = | imagesize = | caption = | formula = (NH4,K)NaSO4·2H2O | IMAsymbol = Lcn | molweight = | strunz = 7.CD.15 | system = Orthorhombic | class = | symmetry = | color = Colorless | habit = | twinning = | cleavage = {011} Distinct | fracture = | mohs = 2–2.5 | luster = Vitreous to dull | refractive = nα = 1.440 nβ = 1.454 nγ = 1.455 | opticalprop = | birefringence = δ = 0.015 | pleochroism = | streak = White | gravity = 1.745 g/cc | density = 1.745 g/cc | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Transparent to translucent | other = | references = }}
Lecontite (sodium ammonium sulfate dihydrate, with potassium substituting for some ammonium, typically about a fourth) is a sulfate mineral with the formula (NH4,K)NaSO4·2H2O. It was found by John Lawrence LeConte in Las Piedras Cave in Honduras as a breakdown product of bat guano, including crystals up to an inch long and identified as a separate mineral by W.J. Taylor in 1858. As of 1963 most natural specimens came from the same cave.