Identification of chemical species in air dust by powder diffractometry

R, Voigt; Lieser, Κ. H.; Baumgärtner, B.

doi:10.1007/bf00410748

Cited by 8 publications

(2 citation statements)

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“…Many authors, generally using X‐ray diffractometry, have reported the atmospheric occurrence of simple salts like (NH 4 ) 2 SO 4 , NaNO 3 , CaSO 4 ·2H 2 O, and mixtures of these salts, and mixed salts like Na 2 Mg(SO 4 ) 2 ·4H 2 O (bloedite), (NH 4 ) 2 Mg(SO 4 ) 2 ·6H 2 O (boussingaultite), (NH 4 ) 2 Ca(SO 4 ) 2 ·H 2 O (koktaite), (NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2 O (mohrite), and others . Obviously, in the atmospheric system, where many different inorganic compounds coexist, the formation of mixtures of two or more salts is expected.…”

Section: Introductionmentioning

confidence: 99%

“…[7,8] Many authors, generally using X-ray diffractometry, have reported the atmospheric occurrence of simple salts like (NH 4 ) 2 SO 4 , NaNO 3 , CaSO 4 Á2H 2 O, and mixtures of these salts, and mixed salts like Na 2 Mg(SO 4 ) 2 Á4H 2 O (bloedite), (NH 4 ) 2 Mg(SO 4 ) 2 Á6H 2 O (boussingaultite), (NH 4 ) 2 Ca(SO 4 ) 2 ÁH 2 O (koktaite), (NH 4 ) 2 Fe(SO 4 ) 2 Á6H 2 O (mohrite), and others. [9][10][11] Obviously, in the atmospheric system, where many different inorganic compounds coexist, the formation of mixtures of two or more salts is expected. The presence of sulfates and nitrates in atmosphere are due to oxidative processes; both SO 2 and NH 3 tend to be oxidized to sulfates and nitrates, respectively, and afterwards to be removed from the atmosphere by deposition processes.…”

Section: Introductionmentioning

confidence: 99%

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Origin of salt mixtures and mixed salts in atmospheric particulate matter

Jentzsch

Ciobotă

Kampe

et al. 2011

J Raman Spectroscopy

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The atmospheric particulate matter contains components of natural and anthropogenic origin, some of them are sulphates and nitrates. Considering the usual occurrence of many ions in the atmosphere and the presence of water, the generation of salt mixtures and mixed salts is possible as a consequence of dissolution–precipitation processes within water droplets, e.g., in fog or haze. This contribution presents the Raman spectroscopic study of the sodium–potassium nitrate system, which generates a salt mixture of both compounds. A phase transition of a KNO3 crystal within a single solution droplet was observed. Additionally, we postulate the atmospheric generation of the mixed salt Na3(NO3)(SO4)·H2O (darapskite) by dissolution–precipitation processes, because Na+, SO42–, and NO3– can be usually found in the atmosphere. The polarized Raman spectra of synthetic darapskite are reported. Copyright © 2011 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%