The Synthesis of a Silicalcyanide and of a Felspar . Ultimate oxidation of this to albite probably would not make any materialchange in the relations of the principal elements, and the constitution of thatmineral may similarly be represented as under— o o It is probable that the free molecule of albite should be represented by two 48 The Synthesis of a Siliealcyanide and of a Felspar. such groups linked up by the residual valence of aluminium. Grthoelase,KSisAlOg, may be similar in structure. The . synthesis of albite from the oxides of its component elements iswell known to be attended
The Synthesis of a Silicalcyanide and of a Felspar . Ultimate oxidation of this to albite probably would not make any materialchange in the relations of the principal elements, and the constitution of thatmineral may similarly be represented as under— o o It is probable that the free molecule of albite should be represented by two 48 The Synthesis of a Siliealcyanide and of a Felspar. such groups linked up by the residual valence of aluminium. Grthoelase,KSisAlOg, may be similar in structure. The . synthesis of albite from the oxides of its component elements iswell known to be attended with difficulty; but the synthesis of the corre-sponding silicide is still more difficult,* owing to the volatility of sodium,and heating under pressure in presence of a considerable excess of sodiumis necessary. When the requisite materials were heated in a strong irontube, closed by a tightly screwed cap, some combination was effected. Thistube and its contents, placed in an inclined position in a powerful mufflefurnace, was heated to the highest attainable temperature for nearly twohours, and then allowed to cool in sand; when quite cold it was cut intofour pieces of nearly equal length. The upper part was lined by somecondensed sodium; the next
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Keywords: ., bookcentury1900, bookdecade1910, bookidphiltrans049, bookyear1913
