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Table 4.14.- Chemical Composition And Strengths Of Fibers From Basalts Obtained From Various Locations
Sample number, rock flow, source	X-6, Lolo Flow, Whitman County, WA	RC-11. Imnaha, Rocky Canyon, ID	K-9068, Elephant Mt., Saddle Mt., WA	K-9064, Middle Yakima, Saddle Mt., WA	O-2, Sweet Home, OR	K9048, Pomona, Saddle Mt., WA	RC-3, Imnaha, Rocky Canyon, ID	K-9017, Lower Yakima, Saddle Mt., WA	BCR-P, Yakima Flow	E-glass Owens-Corning
Analysis, %
SiO₂	49.10	49.41	50.02	50.49	50.50	50.86	51.41	53.61	54.50	52.20
Al₂O₃	13.80	17.92	13.29	13.62	16.00	15.18	15.14	15.14	13.69	14.80
TiO₂	3.16	2.41	3.48	3.06	2.17	1.69	2.22	1.84	2.20	.00
Fe₂O₃	2.00	2.00	2.00	2.00	-	2.00	2.00	2.00	2.00	.30
FeO	11.98	9.66	13.27	12.62	13.80	9.21	11.32	9.60	10.50	.00
MnO	.21	.17	.21	.22	-	.19	.21	.18	.18	.00
CaO	9.43	9.06	8.59	8.48	10.00	10.62	9.33	8.43	6.92	18.70
MgO	5.25	5.64	4.28	4.45	4.30	6.49	5.05	4.98	3.46	3.30
K₂O	1.26	.81	1.35	1.54	.35	.80	.68	1.14	1.70	.00
Na₂O	3.09	2.57	2.95	2.93	3.20	2.62	2.28	2.73	3.27	.30
P₂O₅	.68	.35	.55	.58	-	.33	.36	.35	.36	.20
B₂O₈	.00	.00	.00	.00	.00	.00	.00	.00	.00	10.20
Temperature of drawing, °C	1325	1300^a	1250	1250	1250	1250	1250	1250	1360^a	1250^a
Speed of drum, rpm	515	250	370	515	370	250	370	515	250	250
Number of samples	40	29	30	18	25	20	20	20	31	23
Average diameter of fiber, u	13.0	12.2	13.5	9.0	11.4	11.8	11.3	10.2	12.1	12.2
Average tensile strength,
GPa	1.97	1.99	2.13	2.23	2.08	2.08	2.25	2.45	1.97	2.52
psi	286,000	288,000	309,000	323,000	302,000	301,000	326,000	355,000	285,000	365,000
Young's Modulus,
GPa	82.76	77.93	77.93	87.59	90.34	82.76	87.59	87.59	71.03	81.38
Millions psi	12.0	11.3	11.3	12.7	13.1	12.0	12.7	12.7	10.3	11.8

^aAir jet used.
(Subramanian et al, 1976)