siliceous rockとは 意味・読み方・使い方

Further, by a method where the value obtained by deducting the content of silica in an insoluble component of aqua resia from the total silica content in rock phosphate is regarded as the content of active silica, the amount of a fluorine-based compound to be added, and further the amount of siliceous material such as diatomaceous earth is correctly estimated.例文帳に追加

また、リン鉱石中の「トータルシリカ」から「王水不溶分中のシリカ」分を差し引いた値を「活性シリカ」とする方法により、フッ素系化合物の添加量、更には、珪藻土等のシリカ質の添加量を正確に予想する方法。 - 特許庁