Viscosity and water content of rhyolite glass

摘要: We determined the viscosity of rhyolite glass at temperatures between 350° and 850°C, water pressures zero 68.9 bars, content 0.1 3 weight per cent. Our technique was to construct a compaction rate curve for under known conditions temperature, pressure, load. A similar set curves constructed Corning Pyrex 7740 temperature load (but pressure). Since we knew as function could assign each curves. comparison with those allowed us determine associated our The viscosities range from log η = 9.5 14.5. 850°C bars. ranged less than 3.0 percent.