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Table 3 Particle size and specific surface area results for select volcanic ash samples

From: Assessment of the potential respiratory hazard of volcanic ash from future Icelandic eruptions: a study of archived basaltic to rhyolitic ash samples

Composition Sample < 1 μm < 2.5 μm < 4 μm < 10 μm < 100 μm SSA
Basalt Katla-1755 0.05 0.55 0.99 2.63 33.00 0.41
Laki-SnVII 0.65 3.00 5.07 11.40 60.74 1.00
Laki-SnV 0.35 1.22 1.90 4.72 54.12  
Reyk-1227 0.00 0.13 0.27 1.13 27.32  
Veid-1477 0.00 0.00 0.00 0.00 70.44  
Basaltic-Andesite Hekla-1980 0.00 0.27 0.54 1.80 55.87 0.45
Dacite Askja-59b 0.21 1.38 2.59 7.39 54.97 0.60
Askja-55d 0.17 1.28 2.47 7.36 46.05  
Askja-56a 0.21 1.39 2.64 7.85 49.93  
Rhyolite Orae-s1 0.39 2.12 3.86 10.51 62.03 0.90
Orae-s13 0.26 1.51 2.74 7.66 55.61  
Hekla-4 1.28 6.59 11.26 26.91 77.01 1.64
  1. Particle size data are presented as cumulative volume % (of 2 mm) for health-relevant fractions. Specific surface area (SSA) data are m2 g−1. Samples are ordered according to increasing SiO2 content. All data are averages of three discrete analyses