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Proton multiple-quantum (MQ) spin-counting experiment has been employed to study arrangement of hydrogen atoms in 9Å/11Å natural/synthetic tobermorites. Even though all tobermorite samples give similar characterless, broad static-powder 1 H NMR spectra, their MQ spin-counting spectra are markedly different; higher quanta in 11Å tobermorite do not grow with the MQ excitation time, while those...
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