Canadian Journal of Research/Canadian journal of research · 1929 · 19 citations · 1 references
Natural SciencesChemistryMaterials ScienceCrystal StructureInorganic ChemistryPhysical ChemistryAluminum OxidesCrystal ChemistryHydrate FormationHydrationHydration EffectsAlumina Crystal StructureAluminum Oxide HydrationCrystalline StructureDiffraction PatternsHydrate CharacterizationPressure Effects On Hydrate FormationTemperature Effects On Hydrate FormationX-ray Diffraction Analysis
Further studies on the isometric form of hydrated tricalcium aluminate are reported. These include methods of preparation, crystalline forms, X-ray diffraction pattern, and determinations of solubility and density. The products formed when the hexagonal form of hydrated tricalcium aluminate is dehydrated at definite vapor pressures of Water at 21 °C., were studied. The density, refractive indices, heats of solution in HCl.200 H 2 O, and the X-ray diffraction patterns of several probable hydrates were determined. The experimental evidence given indicates that hydrates of 3CaO.Al 2 O 3 having 6, 8, 91/2, 101/2, and 12 moles of water are formed, but that the water in excess of 8 moles is very loosely held and that its removal does not materially affect the crystal structure. The exact composition of some of the higher hydrates requires confirmation.
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