熔成燐肥の硝子構造と肥効との関連に関する研究(第1報) : 硝子構造と溶解性との関係に就て

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Phosphorus, silicon, aluminum contained in the vitreous fused phosphate (Ca-Mg-phosphate) can be considered respectively as glassformer elements similar to those in ordinary glass. Calculating its chemical composition, a rule of oxide comosition in grass is also applicable to the vitreous fused phosphate. And so a mol ratio of all oxygen contained in the phosphate to the sum of glass-former elements, or P, Si and Al, is easily calculated by its chemical composition. This ratio, or (ΣO)/(P+Si+Al), is tentatively named the oxygen mol ratio of the vitreous fused phosphate, which is thoguht to indicate strength of its chemical durability. The solubility of vitreous fused phosphate in carbondioxide saturated water is generally proportional to the oxygen mol ratio, and the phosphate which has the ratio larger than 3.0 is more soluble than the other.
社団法人日本土壌肥料学会の論文
1953-10-01