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Click Here for Larger Letovicite Image in a New Browser Window Images: ... Comments: Pearly opaque white crystalline letovicite on matrix. ...
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Pearly opaque white crystalline letovicite on matrix. Kladno, Stredocesky, Czech Republic.
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Letovicite H(NH4)3(SO4)2; c 2001-2005 Mineral Data Publishing, version 1; Crystal Data: Triclinic, pseudohexagonal. Point Group: 1 or 1. Crystals are platy, pseudohexagonal, flattened on {001}, corroded or skeletal, to 0.05 mm;
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Classification of Letovicite ... Type Occurrence of Letovicite ... Physical Properties of Letovicite...
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The improper ferroelastic phase letovicite (NH4)3H(SO4)2 has been studied by 1H MAS NMR as well as by static 14N NMR experiments in the temperature range of ...
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The improper ferroelastic phase transition of synthetic letovicite has been studied using optical birefringence, hard mode Raman spectroscopy and X-ra...
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Synthetic letovicite (NH4)3H(SO4)2 has been investigated using 1H static, low-speed MAS, and 15N MAS NMR spectroscopy. Experiments were carried out in the temperature range of 215–425 K. The 1H MAS NMR spectra show three different resonances.
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The observed solid phase is mostly letovicite [(NH4)3H(SO4)2] and sometimes ammonium sulfate [(NH4)2SO4], whereas ammonium bisulfate [(NH4)HSO4] does not nucleate at ... This underlines the atmospheric importance of letovicite, which has been ignored in most previous studies concentrating on ammonium sulfate.
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The deliquescence phase transitions of populations of internally mixed particles of solid ammonium bisulfate and letovicite, having overall extents of neutralization between .60 and .75 and diameters between 15 and 60 nm, were studied using a hygroscopic tandem nano-differential mobility analyzer (HTnDMA).
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; Publications (science and non-science): ... "Fast Size-Resolved Aerosol Composition Measurements In Mexico City With An Aerosol Mass Spectrometer", Jimenez et al., Abstracts for AAAR conference, (2004) ... Heterogeneous nucleation of ice by mineral dust inclusions in ammonium sulfate particles,
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