SEM-EDX data on respirable dust from 25 US coal mines

This database contains particle-level information (i.e., size, normalized elemental % values, estimated volume and mass, inferred mineralogy class) on 171 respirable dust samples collected in 25 underground mines in the United States. The data was obtained using two different computer controlled SEM-EDX routines to analyze submicron ("sub") and supramicron ("supra") particles. Information on the mines and underground sampling locations is available in: E. Sarver, C. Keles, S, Ghaychi Afrouz, Particle size and mineralogy distributions in respirable dust samples from 25 US underground coal mines, Int. J. Coal Geol. 247 (2021) 103851. https://doi.org/10.1016/j.coal.2021.103851

Following is a list of definitions for the table headers:
ParticleID = strings the SEM-EDX routine (sub or supra)_sample number_analysis frame number_ particle number
ExcelRow = Row number in original spreadsheet (internal reference only)
SubOrSupra = Analysis routine (submicron analysis or supramicron analysis)
SampleNo = Sample number
SampleName = strings the mine region, sample number, sampling location, and filter number (internal reference only)
Region = Mine Region
Mine = Sampled Mine
Location = Sampling Location
SubCount = total number of particles analyzed by the submicron routine
SupraCount = total number of particles analyzed by the supramicron routine
SubArea = total area analyzed (square microns) by the submicron routine
SupraArea = total area analyzed (square microns) by the supramicron routine
SubPLD = particles per analyzed area (#/square micron) for the submicron routine
SupraPLD = particles per analyzed area (#/square micron) for the supramicron routine
SubPercent = % of particles in the submicron range
SupraPercent = % of particles in the supramicron range
Particle = Particle Number
Field = Frame Number
Area = projected area of particle (square microns)
Length = the longest dimension of particle (microns)
Width = dimension of particle perpendicular to length (microns)
O = normalized % of oxygen in particle
Al = normalized % of aluminum in particle
Si = normalized % of silicon in particle
C = normalized % of carbon in particle
Mg = normalized % of magnesium in particle
Ca = normalized % of calcium in particle
Ti = normalized % of titanium in particle
Fe = normalized % of iron in particle
PAD = projected area diameter (nanometers)
Volume = estimated particle volume (cubic microns)
Mass = estimated particle mass (micrograms)
Class = Mineralogy class (C = carbonaceous; MC = mixed carbonaceous; ASK = kaolinite-like aluminosilicates; ASO = other silicates; SLO = other silicates ; S = silica; M = heavy minerals; CB = carbonates; O = other