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Condensation of s i l i c a from b r i n e s supersaturated i n s i l i c i c a c i d w a s s t u d i e d over a range of pH (4.5-6. S), temperature (75O-l05OC), s a l i n i t y , and s i l i c i c a c i d concentration (700 t o 1200 ppm as Si02). technique involved analyses f o r molybdate-reactive s i l i c i c a c i d as a function of t i m e a f t e r a supersaturated s o l u t i o n of Si(OH)4 was prepared by mixing a l i q u o t s of a s t o c k s i l i c a t e s o l u t i o n with buffered b r i n e .

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