| CPC C04B 28/06 (2013.01) [C04B 14/06 (2013.01); C04B 22/062 (2013.01); C04B 22/165 (2013.01); C04B 24/42 (2013.01); C04B 28/26 (2013.01); C04B 40/0071 (2013.01); C04B 2111/00181 (2013.01); C04B 2111/00482 (2013.01); C04B 2111/00525 (2013.01); C04B 2111/00637 (2013.01)] | 4 Claims |

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1. A solid formed with Si, Al, Ca, O and at least one of Na and K,
wherein in comparing the 27Al-MAS-NMR spectrum of the solid to the 27Al-MAS-NMR spectrum of calcium aluminate, an additional signal is present in the 27Al-MAS-NMR spectrum of the solid, wherein the additional signal has a chemical shift which lies between that of the main peak of calcium aluminate and that peak of calcium aluminate which is closest to the main peak in the higher field,
wherein on the basis of the signal areas of the three signals attributed to calcium aluminate signal and the additional signal in the 27Al-MAS-NMR spectrum of the solid, the Si/Al-ratio is determined to be less than 1 and greater than 0.1,
wherein a calcium aluminate signal is also present in the 27Al-MAS NMR spectrum of the solid, at a chemical shift around 78 ppm, the calcium aluminate signal being at least 3σ (sigma) above the noise,
wherein the 27Al-MAS-NMR spectrum of the solid has the additional signal and a calcium aluminate signal at a chemical shift around 78 ppm, and
wherein said solid is hydrophobic throughout the volume.
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