Three preparations of the compounds Na4TiO4 and Na2ZrO3 are described and their formulae confirmed by thermogravimetric analysis. The X-ray diffraction pattern of Na4TiO4 is indexed as orthorhombic with cell dimensions a= 11·607, b= 13·610, and c= 9·693 Å, and the compound appears to be one member of an isostructural series of compounds.
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Barker et al. (1972) studied this question.