The Ternary System Na2O-B2O3-SiO2

JSGT 1951 V35T270-T283

In this study of the phase-equilibrium relations in the system Na₂O–B₂O₃–SiO₂ the fields of the compounds have been outlined, and isotherms determined. Portions of the system are exceedingly difficult to crystallise, and no mixture in the binary system B₂O₃–SiO₂ has been crystallised. A new compound, Na₂O.B₂O₃.2SiO₂, has been obtained, the conditions for its preparation and its melting point determined, but its field and the relation of it to the field of the other compounds has not been determined.

George W. Morey