21. The metal aluminate CaAl 2 O 4 is used in the cement industry as a hydraulic material. 22. In the bulky borates and aluminates , the negative charge is symmetrically distributed over many electronegative atoms. 23. Brasseler's EndoSequence bioceramic sealers are tricalcium silicate-based materials without any calcium aluminate phase. 24. The initial reaction ( 1 ) consumes sodium hydroxide and produces both hydrogen gas and an aluminate byproduct. 25. Georges Friedel also synthesised calcium aluminate in 1903 in the framework of his work on the macles theory. 26. Before storage, the catalyst can be washed with distilled water at ambient temperature to remove remaining sodium aluminate . 27. Sodium beta alumina is a non-stoichiometric sodium aluminate known for its rapid transport of Na + ions. 28. It is an important phase in calcium aluminate cements and is an intermediate in the manufacture of Portland cement. 29. Off-white clinker has a calculated C 3 A ( tricalcium aluminate ) of 7-9 %. 30. It bonds covalently in most of its compounds; has an amphoteric oxide; and can form anionic aluminates .
