Characterisation of chemically related asbestos amphiboles of actinolite: proposal for a specific differentiation in the diagram (Si apfu versus Mg/Mg+Fe2+) | International Journal of Metrology and Quality Engineering (IJMQE)

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Table 3

Chemical analysis of asbestos actinolite analysed in six samples of amphibolite with EMP-WDS and TEM-EDS from the same deposit of the outer Alps.

		EMP-WDS results w%						TEM-EDS results w%
		A	B	C	D	E	F	A	B	C	D	E	F
Na₂O		0.21	0.50	0.08	0.17	0.11	0.15	1.67	1.34	0.54	0.69	0.73	0.10
MgO		15.61	14.79	17.96	17.55	18.80	17.66	15.86	19.49	16.23	15.26	20.98	16.20
Al₂O₃		1.30	3.47	0.81	1.11	0.77	1.06	1.57	1.23	0.79	3.16	1.75	1.48
SiO₂		54.69	50.65	56.13	56.35	56.93	55.19	57.31	55.47	57.47	58.04	57.35	57.28
K₂O		0.04	0.07	0.03	0.03	0.02	0.03	0.00	0.00	0.00	0.00	0.00	0.00
CaO		12.79	12.06	12.95	13.09	13.30	12.95	11.31	12.72	15.10	12.86	13.40	17.46
TiO₂		0.01	0.11	0.04	0.05	0.03	0.04	0.00	0.00	0.00	0.00	0.00	0.00
MnO		0.36	0.24	0.26	0.32	0.24	0.28	0.00	0.00	0.00	0.00	0.00	0.00
FeO		12.77	11.84	9.01	9.81	7.64	8.94	11.65	9.76	9.87	9.99	5.80	7.47
Total		97.78	93.73	97.28	98.48	97.86	96.31	99.36	100.01	100.00	100.00	100.01	99.99
	EMP-WDS results (apfu)							TEM-EDS results (apfu)
Si		7.86	7.59	7.96	7.93	7.97	7.92	7.98	7.69	7.99	7.98	7.81	7.92
Mg/Mg+Fe²⁺		0.69	0.7	0.78	0.76	0.81	0.78	0.71	0.81	0.75	0.73	0.87	0.79

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