Spatial structure in low-temperature amorphous phases of water
โ Scribed by I.M. Svishchev; P.G. Kusalik
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 317 KB
- Volume
- 239
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
The spatial (local) structure in liquid water at ambient conditions has been recently determined in computer simulation and neutron diffraction studies using the spatial distribution functions between atoms. The spatial distribution functions of oxygen atoms are analyzed for the low-temperature amorphous phases of water obtained in MD simulations with the TIP4P potential. These structural data reveal the important role played by the nontetrahedral, interstitial coordination of H20 molecules in phase transitions of low-temperature water.
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Differential scanning calorimety (DSC) was used to investigate the properties of gel pore water in hardened cement paste (hop). By comparing heating and cooling thermograms using a step scanning procedure evidence was found for new phase transitions due to structured water. The new tran.~itions occu