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surrounding NH 4 + and Al 3 + in NH 4 Al ( SO 4 ) 2 $ 12 H 2 O by 1 H MAS NMR , 14 N NMR , and 27 Al NMR
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2017 |
| Abstract | In order to understand the thermodynamic properties and structural geometry of NH4Al(SO4)2$12H2O, we studied the magic angle spinning nuclear magnetic resonance (MAS NMR) and static NMR as a function of temperature. The changes of the chemical shifts, linewidths, resonance frequencies, and spin–lattice relaxation times for H, N, and Al nuclei near Td (1⁄4335 K), which is interpreted as the onset of partial thermal decomposition, are due to the structural phase transition. The changes near Td are related to the loss of H2O, which probably disrupts the forms of the octahedra of water molecules surrounding NH4 + |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2017/ra/c7ra09488d |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
