The iron-catalysed surface reactivity and health-pertinent physical characteristics of explosive volcanic ash from Mt. Etna, Italy

Table 3 Whole-rock XRF data for Etna ash samples (oxide weight %)

Sample #	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	SO₃	LOI	Total
INGV_1	48.82	1.61	17.72	10.30	0.171	4.66	9.43	4.16	2.049	0.599	0.045	−0.09	99.48
INGV_2	46.74	1.79	16.96	11.59	0.177	5.16	10.50	3.45	2.039	0.558	0.047	0.03	99.05
INGV_3	47.73	1.78	17.20	11.51	0.169	5.67	10.38	3.28	1.866	0.536	0.080	−0.19	100.00
INGV_4	47.37	1.72	16.84	11.44	0.177	5.68	10.16	3.41	1.928	0.560	0.020	0.09	99.40
INGV_5	46.76	1.81	16.63	11.79	0.181	5.64	10.50	3.52	1.925	0.557	0.123	−0.10	99.34
INGV_6	46.69	1.82	16.72	11.87	0.177	5.41	10.64	3.41	1.931	0.542	0.061	−0.23	99.04
INGV_7	46.59	1.78	16.93	11.86	0.177	5.77	10.48	3.39	1.915	0.527	0.067	−0.24	99.26
INGV_8	47.91	1.69	17.61	10.86	0.172	4.80	10.10	3.71	2.142	0.577	0.060	0.00	99.62
CdF_1	49.28	1.44	19.84	9.10	0.151	3.12	8.98	4.14	1.593	0.620	0.017	0.95	99.22
CdF_2	49.01	1.41	19.52	9.19	0.150	3.43	9.09	4.09	1.540	0.602	0.023	0.70	98.74
CdF_3	48.41	1.46	19.96	9.41	0.154	3.33	8.84	3.83	1.465	0.624	0.038	1.71	99.23
CdF_4	45.21	1.69	19.48	10.56	0.199	3.35	7.66	3.09	1.246	0.711	0.026	5.92	99.15
CdF_5	47.81	1.51	19.80	9.61	0.161	3.39	8.35	3.74	1.441	0.621	0.035	3.13	99.60
CdF_6	48.09	1.59	18.77	8.95	0.122	2.64	6.96	3.74	1.796	0.746	0.240	5.71	99.36
CdF_7	48.57	1.58	18.77	8.64	0.134	2.74	7.37	3.79	1.720	0.715	0.220	4.94	99.19
CdF_8	49.04	1.48	19.67	9.34	0.155	3.41	9.79	4.09	1.545	0.553	0.036	0.24	99.36
ETNA4/11/02	47.46	1.73	16.72	11.56	0.17	5.72	10.10	3.84	2.10	0.61	-	−0.18	99.84

ISSN: 2191-5040