Samples were collected with a slat plate type sampler (Waza et al., 2019) in the suburbs of Dushanbe, Tajikistan, between 28 August 2016 and 07 September 2016. The geographical coordinates are N 38.5594°, E 68.8561°, height is approximately 870 m above sea level.Samples were subject to automated scanning electron microscopy with coupled X-ray analysis (Kandler et al., 2018).Each data file is one sample (approximately diurnal collection), an overview with meta data is given in the sample list file. Please refer to the description files for more details.